Gimp Version 2.8 User manual

GNU Image Manipulation Program

User Manual

September 29, 2016

GNU Image Manipulation Program

GIMP Documentation Team

Legal Notice

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free

Documentation License, Version 1.2 or any later version published by the Free Software Foundation;

with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is

included in the section enphrased GNU Free Documentation License.

ii

Contents

I Getting Started 1

1 Introduction 3

1.1 WelcometoGIMP.......................................... 3

1.1.1 Authors ........................................... 3

1.1.2 TheGIMPHelpsystem .................................. 3

1.1.3 FeaturesandCapabilities ................................. 3

1.2 What’sNewinGIMP2.8? ..................................... 4

2 Fire up the GIMP 11

2.1 RunningGIMP ........................................... 11

2.1.1 KnownPlatforms...................................... 11

2.1.2 Language .......................................... 11

2.1.3 CommandLineArguments................................ 12

2.2 StartingGIMPthefirsttime .................................... 13

2.2.1 Finally... ......................................... 13

3 First Steps with Wilber 15

3.1 BasicConcepts............................................ 15

3.2 MainWindows ........................................... 17

3.2.1 TheToolbox......................................... 20

3.2.2 ImageWindow ....................................... 22

3.2.3 DialogsandDocking.................................... 25

3.3 Undoing ............................................... 31

3.3.1 Things That Cannot be Undone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

3.4 CommonTasks ........................................... 32

3.4.1 Intention........................................... 32

3.4.2 Change the Size of an Image for the screen . . . . . . . . . . . . . . . . . . . . . . . 32

3.4.3 Change the Size of an Image for print . . . . . . . . . . . . . . . . . . . . . . . . . . 34

3.4.4 CompressingImages.................................... 35

3.4.5 CropAnImage ....................................... 38

3.4.6 FindInfoAboutYourImage ............................... 39

3.4.7 ChangetheMode...................................... 40

3.4.8 FlipAnImage........................................ 42

3.4.9 RotateAnImage ...................................... 44

3.4.10 Separating an Object From Its Background . . . . . . . . . . . . . . . . . . . . . . . 45

3.5 HowtoDrawStraightLines.................................... 47

3.5.1 Intention........................................... 47

3.5.2 Examples .......................................... 50

4 Getting Unstuck 53

4.1 GettingUnstuck........................................... 53

4.1.1 Stuck!............................................. 53

4.1.2 Common Causes of GIMP Non-Responsiveness . . . . . . . . . . . . . . . . . . . . 53

II How do I Become a GIMP Wizard? 57

5 Getting Images into GIMP 59

5.1 ImageTypes............................................. 59

5.2 CreatingnewFiles ......................................... 61

5.3 OpeningFiles ............................................ 61

5.3.1 OpenFile .......................................... 61

iii

CONTENTS

5.3.2 OpenLocation ....................................... 62

5.3.3 OpenRecent......................................... 63

5.3.4 UsingExternalPrograms ................................. 63

5.3.5 FileManager ........................................ 63

5.3.6 DragandDrop ....................................... 63

5.3.7 CopyandPaste....................................... 64

5.3.8 ImageBrowser ....................................... 64

6 Getting Images out of GIMP 65

6.1 Files.................................................. 65

6.1.1 Save/ExportImages ................................... 65

6.1.2 FileFormats......................................... 65

6.2 Preparing your Images for the Web . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

6.2.1 Images with an Optimal Size/Quality Ratio . . . . . . . . . . . . . . . . . . . . . . 72

6.2.2 Reducing the File Size Even More . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

6.2.3 Saving Images with Transparency . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

7 Painting with GIMP 77

7.1 TheSelection............................................. 77

7.1.1 Feathering.......................................... 78

7.1.2 Making a Selection Partially Transparent . . . . . . . . . . . . . . . . . . . . . . . . 79

7.2 CreatingandUsingSelections................................... 79

7.2.1 MovingaSelection..................................... 79

7.2.2 Adding or subtracting selections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

7.3 TheQuickMask ........................................... 81

7.3.1 Overview .......................................... 82

7.3.2 Properties .......................................... 82

7.4 UsingQuickMaskMode ...................................... 83

7.5 Paths................................................. 83

7.5.1 PathCreation ........................................ 83

7.5.2 PathProperties ....................................... 84

7.5.3 PathsandSelections .................................... 85

7.5.4 TransformingPaths .................................... 85

7.5.5 StrokingaPath ....................................... 85

7.5.6 PathsandText ....................................... 86

7.5.7 PathsandSVGfiles..................................... 86

7.6 Brushes................................................ 87

7.7 AddingNewBrushes........................................ 89

7.8 TheGIHDialogBox ........................................ 90

7.9 Varyingbrushsize ......................................... 94

7.9.1 How to vary the height of a brush . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

7.9.2 Creatingabrushquickly.................................. 95

7.10Gradients............................................... 96

7.11Patterns................................................ 98

7.12Palettes................................................ 101

7.12.1 Colormap .......................................... 102

7.13Presets ................................................ 103

7.14DrawingSimpleObjects ...................................... 103

7.14.1 DrawingaStraightLine.................................. 103

7.14.2 CreatingaBasicShape................................... 105

8 Combining Images 107

8.1 IntroductiontoLayers ....................................... 107

8.1.1 LayerProperties ...................................... 107

8.2 LayerModes............................................. 111

8.3 CreatingNewLayers........................................ 126

8.4 LayerGroups ............................................ 126

iv

CONTENTS

9 Text Management 129

9.1 TextManagement.......................................... 129

9.1.1 TextArea .......................................... 129

9.1.2 ManagingTextLayer.................................... 130

9.1.3 TextToolbox ........................................ 131

9.1.4 TextContextMenu..................................... 132

9.2 Text.................................................. 134

9.2.1 EmbellishingText ..................................... 134

9.2.2 AddingFonts ........................................ 134

9.2.3 FontProblems........................................ 136

10 Enhancing Photographs 137

10.1 Working with Digital Camera Photos . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

10.1.1 Introduction......................................... 137

10.1.2 ImprovingComposition.................................. 137

10.1.3 ImprovingColors...................................... 138

10.1.4 AdjustingSharpness.................................... 140

10.1.5 Removing Unwanted Objects from an Image . . . . . . . . . . . . . . . . . . . . . . 141

10.1.6 SavingYourResults .................................... 142

11 Color Management with GIMP 145

11.1ColorManagementinGIMP.................................... 145

11.1.1 Problems of a non Color Managed Workflow . . . . . . . . . . . . . . . . . . . . . . 145

11.1.2 Introduction to a Color Managed Workflow . . . . . . . . . . . . . . . . . . . . . . 146

12 Enrich my GIMP 149

12.1PreferencesDialog ......................................... 149

12.1.1 Introduction......................................... 149

12.1.2 Environment ........................................ 150

12.1.3 Interface........................................... 151

12.1.4 Theme ............................................ 152

12.1.5 HelpSystem......................................... 153

12.1.6 ToolOptions ........................................ 154

12.1.7 Toolbox ........................................... 155

12.1.8 DefaultImagePreferences................................. 156

12.1.9 DefaultImageGrid..................................... 157

12.1.10ImageWindows ...................................... 158

12.1.11ImageWindowAppearance................................ 159

12.1.12 Image Window Title and Statusbar . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160

12.1.13Display............................................ 161

12.1.14ColorManagement..................................... 162

12.1.15InputDevices........................................ 165

12.1.16InputControllers...................................... 166

12.1.17WindowManagement................................... 168

12.1.18Folders............................................ 169

12.1.19DataFolders......................................... 170

12.2GridsandGuides.......................................... 171

12.2.1 TheImageGrid....................................... 171

12.2.2 Guides............................................ 172

12.3RenderingaGrid .......................................... 173

12.4HowtoSetYourTileCache .................................... 173

12.5 Creating Shortcuts to Menu Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174

12.6CustomizeSplash-Screen...................................... 176

v

CONTENTS

13 Scripting 177

13.1Plugins................................................ 177

13.1.1 Introduction......................................... 177

13.1.2 UsingPlugins........................................ 178

13.1.3 InstallingNewPlugins................................... 178

13.1.4 WritingPlugins....................................... 179

13.2UsingScript-FuScripts....................................... 180

13.2.1 Script-Fu? .......................................... 180

13.2.2 InstallingScript-Fus .................................... 180

13.2.3 Do’sandDon’ts....................................... 180

13.2.4 Different Kinds Of Script-Fus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180

13.2.5 StandaloneScripts ..................................... 182

13.2.6 Image-DependentScripts ................................. 183

13.3AScript-FuTutorial......................................... 183

13.3.1 Getting Acquainted With Scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183

13.3.2 VariablesAndFunctions.................................. 185

13.3.3 Lists,ListsAndMoreLists ................................ 187

13.3.4 YourFirstScript-FuScript................................. 190

13.3.5 Giving Our Script Some Guts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196

13.3.6 Extending The Text Box Script . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198

13.3.7 Yourscriptanditsworking................................ 200

III Function Reference 203

14 Tools 205

14.1TheToolbox ............................................. 205

14.1.1 Introduction......................................... 205

14.1.2 ToolIcons .......................................... 206

14.1.3 ColorandIndicatorArea ................................. 206

14.1.4 ToolOptions ........................................ 208

14.2SelectionTools............................................ 209

14.2.1 CommonFeatures ..................................... 209

14.2.2 RectangleSelection..................................... 211

14.2.3 EllipseSelection....................................... 215

14.2.4 FreeSelection(Lasso) ................................... 218

14.2.5 Fuzzy selection (Magic wand) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220

14.2.6 SelectByColor ....................................... 222

14.2.7 IntelligentScissors ..................................... 224

14.2.8 ForegroundSelect ..................................... 226

14.3PaintTools.............................................. 230

14.3.1 CommonFeatures ..................................... 230

14.3.2 Dynamics .......................................... 235

14.3.3 Brush Tools (Pencil, Paintbrush, Airbrush) . . . . . . . . . . . . . . . . . . . . . . . 243

14.3.4 BucketFill.......................................... 243

14.3.5 Blend............................................. 246

14.3.6 Pencil............................................. 249

14.3.7 Paintbrush.......................................... 251

14.3.8 Eraser ............................................ 252

14.3.9 Airbrush........................................... 254

14.3.10Ink .............................................. 256

14.3.11Clone............................................. 257

14.3.12Heal ............................................. 261

14.3.13PerspectiveClone...................................... 263

14.3.14Blur/Sharpen........................................ 265

14.3.15Smudge ........................................... 267

14.3.16Dodge/Burn ........................................ 268

14.4TransformTools........................................... 270

14.4.1 CommonFeatures ..................................... 270

vi

CONTENTS

14.4.2 Align............................................. 273

14.4.3 Move............................................. 276

14.4.4 Crop ............................................. 278

14.4.5 Rotate ............................................ 281

14.4.6 Scale ............................................. 283

14.4.7 Shear............................................. 285

14.4.8 Perspective ......................................... 287

14.4.9 Flip.............................................. 289

14.4.10TheCageTool........................................ 290

14.5ColorTools.............................................. 292

14.5.1 Overview .......................................... 292

14.5.2 ColorBalance........................................ 293

14.5.3 Hue-Saturation ....................................... 295

14.5.4 Colorize ........................................... 297

14.5.5 Brightness-Contrast .................................... 298

14.5.6 Threshold .......................................... 299

14.5.7 Levels ............................................ 303

14.5.8 Curves............................................ 308

14.5.9 Posterize........................................... 312

14.5.10Desaturate.......................................... 313

14.6Other ................................................. 314

14.6.1 Overview .......................................... 314

14.6.2 Paths............................................. 315

14.6.3 ColorPicker......................................... 318

14.6.4 Zoom............................................. 320

14.6.5 Measure ........................................... 321

14.6.6 Text.............................................. 322

14.6.7 GEGLOperation ...................................... 325

15 Dialogs 329

15.1DialogIntroduction......................................... 329

15.2 Image Structure Related Dialogs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 329

15.2.1 LayersDialog........................................ 329

15.2.2 ChannelsDialog ...................................... 334

15.2.3 PathsDialog......................................... 340

15.2.4 ColormapDialog...................................... 344

15.2.5 Histogramdialog...................................... 346

15.2.6 NavigationDialog ..................................... 349

15.2.7 UndoHistoryDialog.................................... 350

15.3 Image-content Related Dialogs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 352

15.3.1 FG/BGColorDialog.................................... 352

15.3.2 BrushesDialog ....................................... 355

15.3.3 PatternsDialog ....................................... 359

15.3.4 GradientsDialog ...................................... 362

15.3.5 PalettesDialog ....................................... 369

15.3.6 Tagging ........................................... 376

15.3.7 FontsDialog......................................... 377

15.4 Image Management Related Dialogs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 379

15.4.1 BuffersDialog........................................ 379

15.4.2 ImagesDialog........................................ 381

15.4.3 DocumentHistoryDialog................................. 382

15.4.4 TemplatesDialog...................................... 383

15.5Misc.Dialogs ............................................ 386

15.5.1 ToolPresetsDialog..................................... 386

15.5.2 ToolPresetEditor...................................... 388

15.5.3 DeviceStatusDialog.................................... 388

15.5.4 ErrorConsole........................................ 389

15.5.5 SaveFile........................................... 390

15.5.6 ExportFile.......................................... 391

vii

CONTENTS

15.5.7 SamplePointsDialog ................................... 393

15.5.8 PointerDialog........................................ 395

16 Menus 397

16.1IntroductiontoMenus ....................................... 397

16.1.1 TheImageMenuBar.................................... 397

16.1.2 ContextMenus ....................................... 397

16.1.3 Tear-offmenus ....................................... 397

16.1.4 Tabmenus.......................................... 398

16.2The“File”Menu........................................... 399

16.2.1 Overview .......................................... 399

16.2.2 New…............................................ 399

16.2.3 Create ............................................ 402

16.2.4 Open…............................................ 404

16.2.5 OpenasLayers…...................................... 406

16.2.6 OpenLocation… ...................................... 406

16.2.7 OpenRecent......................................... 407

16.2.8 Save ............................................. 407

16.2.9 Saveas…........................................... 407

16.2.10SaveaCopy…........................................ 409

16.2.11Revert ............................................ 409

16.2.12Export…........................................... 410

16.2.13ExportAs…......................................... 410

16.2.14CreateTemplate… ..................................... 410

16.2.15Print ............................................. 411

16.2.16Close............................................. 411

16.2.17Closeall ........................................... 412

16.2.18Quit ............................................. 412

16.3The“Edit”Menu .......................................... 413

16.3.1 “Edit”MenuEntries .................................... 413

16.3.2 Undo............................................. 413

16.3.3 Redo ............................................. 414

16.3.4 Fade ............................................. 414

16.3.5 UndoHistory........................................ 414

16.3.6 Cut.............................................. 415

16.3.7 Copy............................................. 415

16.3.8 CopyVisible......................................... 415

16.3.9 Paste ............................................. 416

16.3.10PasteInto .......................................... 416

16.3.11Pasteas ........................................... 416

16.3.12Buffer ............................................ 418

16.3.13Clear............................................. 418

16.3.14FillwithFGColor ..................................... 419

16.3.15FillwithBGColor ..................................... 419

16.3.16FillwithPattern....................................... 420

16.3.17StrokeSelection....................................... 420

16.3.18StrokePath ......................................... 421

16.3.19 The “Preferences” Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 423

16.3.20KeyboardShortcuts .................................... 423

16.3.21Modules........................................... 423

16.3.22Units............................................. 424

16.4The“Select”Menu ......................................... 425

16.4.1 Introduction to the “Select” Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . 425

16.4.2 SelectAll........................................... 426

16.4.3 None............................................. 426

16.4.4 Invert............................................. 426

16.4.5 Float ............................................. 427

16.4.6 ByColor........................................... 428

16.4.7 FromPath.......................................... 428

viii

CONTENTS

16.4.8 SelectionEditor....................................... 428

16.4.9 Feather............................................ 431

16.4.10Sharpen ........................................... 432

16.4.11Shrink ............................................ 432

16.4.12Grow............................................. 433

16.4.13Border ............................................ 434

16.4.14Distort ............................................ 435

16.4.15RoundedRectangle..................................... 436

16.4.16ToggleQuickMask..................................... 437

16.4.17SavetoChannel....................................... 437

16.4.18ToPath............................................ 437

16.5The“View”Menu.......................................... 438

16.5.1 Introduction to the “View” Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . 438

16.5.2 NewView.......................................... 438

16.5.3 DotforDot ......................................... 439

16.5.4 Zoom............................................. 439

16.5.5 ShrinkWrap......................................... 441

16.5.6 FullScreen.......................................... 441

16.5.7 NavigationWindow .................................... 442

16.5.8 DisplayFilters........................................ 442

16.5.9 ShowSelection ....................................... 447

16.5.10ShowLayerBoundary................................... 447

16.5.11ShowGuides ........................................ 448

16.5.12ShowGrid.......................................... 448

16.5.13ShowSamplePoints .................................... 448

16.5.14SnaptoGuides ....................................... 448

16.5.15SnaptoGrid......................................... 448

16.5.16SnaptoCanvas ....................................... 449

16.5.17SnaptoActivePath..................................... 449

16.5.18PaddingColor........................................ 449

16.5.19ShowMenubar ....................................... 450

16.5.20ShowRulers......................................... 450

16.5.21ShowScrollbars....................................... 450

16.5.22ShowStatusbar....................................... 450

16.6The“Image”Menu ......................................... 451

16.6.1 Overview .......................................... 451

16.6.2 Duplicate .......................................... 451

16.6.3 Mode............................................. 452

16.6.4 RGBmode.......................................... 452

16.6.5 Grayscalemode....................................... 452

16.6.6 Indexedmode........................................ 452

16.6.7 Transform.......................................... 454

16.6.8 Flip Horizontally; Flip Vertically . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 455

16.6.9 Rotation ........................................... 455

16.6.10Guillotine .......................................... 455

16.6.11CanvasSize ......................................... 455

16.6.12FitCanvastoLayers .................................... 459

16.6.13FitCanvastoSelection................................... 459

16.6.14PrintSize........................................... 459

16.6.15ScaleImage ......................................... 460

16.6.16CroptoSelection ...................................... 461

16.6.17AutocropImage....................................... 462

16.6.18ZealousCrop ........................................ 462

16.6.19MergeVisibleLayers.................................... 463

16.6.20FlattenImage ........................................ 464

16.6.21AlignVisibleLayers…................................... 465

16.6.22Guides............................................ 468

16.6.23NewGuide ......................................... 468

16.6.24NewGuide(byPercent).................................. 469

ix

CONTENTS

16.6.25NewGuidesfromSelection................................ 470

16.6.26Removeallguides ..................................... 470

16.6.27ConfigureGrid…...................................... 470

16.6.28ImageProperties ...................................... 471

16.7The“Layer”Menu ......................................... 474

16.7.1 Introduction to the “Layer” Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . 474

16.7.2 NewLayer.......................................... 475

16.7.3 NewLayerGroup ..................................... 475

16.7.4 NewFromVisible ..................................... 476

16.7.5 Duplicatelayer ....................................... 476

16.7.6 Anchorlayer ........................................ 476

16.7.7 MergeDown ........................................ 477

16.7.8 DeleteLayer......................................... 477

16.7.9 The Text Commands of the Layer Menu . . . . . . . . . . . . . . . . . . . . . . . . . 477

16.7.10DiscardTextInformation ................................. 478

16.7.11“Stack”Submenu...................................... 478

16.7.12SelectPreviousLayer.................................... 479

16.7.13SelectNextLayer...................................... 479

16.7.14SelectTopLayer ...................................... 480

16.7.15SelectBottomLayer .................................... 480

16.7.16RaiseLayer ......................................... 481

16.7.17LowerLayer......................................... 481

16.7.18LayertoTop......................................... 481

16.7.19LayertoBottom....................................... 481

16.7.20 The “Reverse Layer Order” command . . . . . . . . . . . . . . . . . . . . . . . . . . 481

16.7.21The“Mask”Submenu ................................... 482

16.7.22AddLayerMask ...................................... 482

16.7.23ApplyLayerMask .................................... 483

16.7.24DeleteLayerMask ..................................... 484

16.7.25ShowLayerMask...................................... 484

16.7.26EditLayerMask ...................................... 484

16.7.27DisableLayerMask .................................... 484

16.7.28MasktoSelection...................................... 485

16.7.29 Add Layer Mask to Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 485

16.7.30 Subtract Layer Mask from Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . 486

16.7.31 Intersect Layer Mask with Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . 486

16.7.32 The “Transparency” Submenu of the “Layer” menu . . . . . . . . . . . . . . . . . 487

16.7.33AddAlphaChannel .................................... 487

16.7.34RemoveAlphaChannel .................................. 488

16.7.35ColortoAlpha ....................................... 488

16.7.36Semi-flatten ......................................... 488

16.7.37ThresholdAlpha ...................................... 488

16.7.38AlphatoSelection ..................................... 489

16.7.39 Add Alpha channel to Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 490

16.7.40SubtractfromSelection .................................. 491

16.7.41 Intersect Alpha channel with Selection . . . . . . . . . . . . . . . . . . . . . . . . . 491

16.7.42The“Transform”Submenu ................................ 492

16.7.43FlipHorizontally...................................... 492

16.7.44FlipVertically........................................ 493

16.7.45Rotate90°clockwise .................................... 493

16.7.46 Rotate 90° counter-clockwise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 494

16.7.47Rotate180°.......................................... 494

16.7.48ArbitraryRotation ..................................... 495

16.7.49Offset............................................. 495

16.7.50LayerBoundarySize.................................... 497

16.7.51LayertoImageSize..................................... 499

16.7.52ScaleLayer ......................................... 499

16.7.53CroptoSelection ...................................... 500

16.7.54AutocropLayer....................................... 500

x

CONTENTS

16.8The“Colors”Menu......................................... 501

16.8.1 Introduction to the “Colors” Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . 501

16.8.2 ColorsTools......................................... 502

16.8.3 Invert............................................. 502

16.8.4 ValueInvert......................................... 503

16.8.5 UseGEGL.......................................... 503

16.8.6 The“Auto”Submenu ................................... 504

16.8.7 Equalize ........................................... 506

16.8.8 WhiteBalance........................................ 506

16.8.9 ColorEnhance ....................................... 507

16.8.10Normalize.......................................... 508

16.8.11StretchContrast....................................... 508

16.8.12StretchHSV......................................... 509

16.8.13 The “Components” Submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 509

16.8.14ChannelMixer ....................................... 510

16.8.15Compose........................................... 513

16.8.16Decompose......................................... 515

16.8.17Recompose ......................................... 517

16.8.18The“Map”Submenu.................................... 517

16.8.19RearrangeColormap.................................... 519

16.8.20SetColormap ........................................ 520

16.8.21AlienMap.......................................... 521

16.8.22ColorExchange....................................... 522

16.8.23GradientMap........................................ 524

16.8.24PaletteMap ......................................... 524

16.8.25RotateColors ........................................ 525

16.8.26SampleColorize ...................................... 528

16.8.27The“Info”Submenu.................................... 530

16.8.28Histogram.......................................... 531

16.8.29BorderAverage....................................... 531

16.8.30ColorcubeAnalysis..................................... 532

16.8.31SmoothPalette ....................................... 533

16.8.32TheColorFilters ...................................... 533

16.8.33Colorify….......................................... 534

16.8.34ColortoAlpha… ...................................... 535

16.8.35FilterPack…......................................... 536

16.8.36Hot…............................................. 538

16.8.37MaximumRGB…...................................... 539

16.8.38Retinex............................................ 540

16.9The“Tools”Menu ......................................... 542

16.9.1 Introduction to the “Tools” Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . 542

16.10The“Filters”Menu ......................................... 542

16.10.1 Introduction to the “Filters” Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . 542

16.10.2RepeatLast ......................................... 543

16.10.3Re-showLast ........................................ 543

16.10.4ResetAllFilters....................................... 544

16.10.5The“Python-Fu”Submenu ................................ 544

16.10.6The“Script-Fu”Submenu................................. 546

16.11“Windows”Menu.......................................... 548

16.12The“Help”Menu.......................................... 549

16.12.1 Introduction to the “Help” Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 549

16.12.2Help ............................................. 550

16.12.3ContextHelp ........................................ 550

16.12.4TipoftheDay........................................ 550

16.12.5About ............................................ 551

16.12.6Plug-InBrowser....................................... 552

16.12.7TheProcedureBrowser .................................. 553

16.12.8GIMPonline......................................... 554

xi

CONTENTS

17 Filters 555

17.1Introduction............................................. 555

17.1.1 Preview ........................................... 555

17.2BlurFilters.............................................. 556

17.2.1 Introduction......................................... 556

17.2.2 Blur.............................................. 558

17.2.3 GaussianBlur........................................ 558

17.2.4 SelectiveGaussianBlur .................................. 560

17.2.5 MotionBlur......................................... 561

17.2.6 Pixelise............................................ 563

17.2.7 TileableBlur......................................... 564

17.3EnhanceFilters ........................................... 566

17.3.1 Introduction......................................... 566

17.3.2 Antialias........................................... 566

17.3.3 Deinterlace ......................................... 567

17.3.4 Despeckle .......................................... 568

17.3.5 Destripe ........................................... 569

17.3.6 NLFilter........................................... 570

17.3.7 RedEyeRemoval...................................... 572

17.3.8 Sharpen ........................................... 573

17.3.9 UnsharpMask ....................................... 574

17.4DistortFilters ............................................ 577

17.4.1 Introduction......................................... 577

17.4.2 Blinds ............................................ 577

17.4.3 CurveBend ......................................... 578

17.4.4 Emboss............................................ 580

17.4.5 Engrave ........................................... 581

17.4.6 EraseEveryOtherRow .................................. 583

17.4.7 IWarp ............................................ 584

17.4.8 LensDistortion ....................................... 586

17.4.9 Mosaic............................................ 588

17.4.10Newsprint.......................................... 590

17.4.11PageCurl .......................................... 592

17.4.12PolarCoords ........................................ 593

17.4.13Ripple ............................................ 595

17.4.14Shift ............................................. 597

17.4.15ValuePropagate ...................................... 598

17.4.16Video............................................. 601

17.4.17Waves ............................................ 602

17.4.18WhirlandPinch ...................................... 604

17.4.19Wind............................................. 605

17.4.20ApplyLens ......................................... 608

17.5LightandShadowFilters...................................... 609

17.5.1 Introduction......................................... 609

17.5.2 GradientFlare........................................ 609

17.5.3 LensFlare .......................................... 614

17.5.4 LightingEffects....................................... 616

17.5.5 Sparkle............................................ 620

17.5.6 Supernova.......................................... 622

17.5.7 DropShadow........................................ 624

17.5.8 Perspective ......................................... 625

17.5.9 Xach-Effect ......................................... 628

17.5.10GlassTile .......................................... 629

17.6NoiseFilters............................................. 630

17.6.1 Introduction......................................... 630

17.6.2 HSVNoise.......................................... 631

17.6.3 Hurl ............................................. 632

17.6.4 Pick.............................................. 634

17.6.5 RGBNoise.......................................... 635

xii

CONTENTS

17.6.6 Slur.............................................. 637

17.6.7 Spread ............................................ 638

17.7Edge-DetectFilters ......................................... 639

17.7.1 Introduction......................................... 639

17.7.2 DifferenceofGaussians .................................. 640

17.7.3 Edge ............................................. 642

17.7.4 Laplace............................................ 644

17.7.5 Neon............................................. 644

17.7.6 Sobel............................................. 645

17.8GenericFilters............................................ 646

17.8.1 Introduction......................................... 646

17.8.2 ConvolutionMatrix .................................... 646

17.8.3 Dilate............................................. 651

17.8.4 Erode............................................. 652

17.9CombineFilters ........................................... 652

17.9.1 Introduction......................................... 652

17.9.2 DepthMerge ........................................ 652

17.9.3 Filmstrip........................................... 655

17.10ArtisticFilters ............................................ 657

17.10.1Introduction......................................... 657

17.10.2ApplyCanvas........................................ 657

17.10.3Cartoon ........................................... 659

17.10.4Clothify ........................................... 660

17.10.5Cubism............................................ 661

17.10.6GIMPressionist ....................................... 663

17.10.7Oilify............................................. 672

17.10.8Photocopy.......................................... 674

17.10.9Predator ........................................... 676

17.10.10Softglow........................................... 678

17.10.11VanGogh(LIC)....................................... 679

17.10.12Weave ............................................ 682

17.11DecorFilters............................................. 683

17.11.1Introduction......................................... 683

17.11.2AddBevel.......................................... 684

17.11.3AddBorder ......................................... 685

17.11.4CoffeeStain ......................................... 686

17.11.5FuzzyBorder ........................................ 687

17.11.6OldPhoto .......................................... 689

17.11.7RoundCorners ....................................... 691

17.11.8Slide ............................................. 693

17.11.9StencilCarve ........................................ 694

17.11.10StencilChrome ....................................... 696

17.12MapFilters.............................................. 699

17.12.1Introduction......................................... 699

17.12.2BumpMap.......................................... 699

17.12.3Displace ........................................... 701

17.12.4FractalTrace......................................... 705

17.12.5Illusion............................................ 706

17.12.6MakeSeamless ....................................... 708

17.12.7MapObject ......................................... 708

17.12.8PaperTile .......................................... 712

17.12.9SmallTiles.......................................... 714

17.12.10Tile.............................................. 715

17.12.11Warp............................................. 716

17.13RenderingFilters .......................................... 719

17.13.1Introduction......................................... 719

17.13.2DifferenceClouds ..................................... 719

17.13.3Fog.............................................. 720

17.13.4Plasma............................................ 721

xiii

CONTENTS

17.13.5SolidNoise ......................................... 722

17.13.6Flame............................................. 723

17.13.7IFSFractal.......................................... 726

17.13.8Checkerboard........................................ 731

17.13.9CMLExplorer........................................ 732

17.13.10DiffractionPatterns..................................... 737

17.13.11Grid ............................................. 738

17.13.12Jigsaw ............................................ 740

17.13.13Maze............................................. 742

17.13.14Qbist............................................. 743

17.13.15Sinus............................................. 744

17.13.16Circuit ............................................ 746

17.13.17FractalExplorer....................................... 747

17.13.18Gfig.............................................. 752

17.13.19Lava ............................................. 754

17.13.20LineNova.......................................... 755

17.13.21SphereDesigner ...................................... 757

17.13.22Spyrogimp.......................................... 759

17.14WebFilters ............................................. 761

17.14.1Introduction......................................... 761

17.14.2ImageMap.......................................... 761

17.14.3Semi-Flatten......................................... 766

17.14.4Slice ............................................. 767

17.15AnimationFilters .......................................... 770

17.15.1Introduction......................................... 770

17.15.2Blend............................................. 770

17.15.3Burn-In............................................ 771

17.15.4Rippling........................................... 773

17.15.5SpinningGlobe....................................... 774

17.15.6Waves ............................................ 775

17.15.7Optimize........................................... 776

17.15.8Playback........................................... 777

17.16AlphatoLogoFilters........................................ 777

17.16.1Introduction......................................... 777

17.16.23DOutline.......................................... 778

17.16.3AlienGlow ......................................... 781

17.16.4AlienNeon ......................................... 782

17.16.5BasicI&II.......................................... 783

17.16.6Blended ........................................... 784

17.16.7Bovination.......................................... 785

17.16.8Chalk............................................. 786

17.16.9ChipAway ......................................... 788

17.16.10Chrome ........................................... 790

17.16.11ComicBook......................................... 791

17.16.12CoolMetal.......................................... 792

17.16.13Frosty ............................................ 793

17.16.14Glossy ............................................ 794

17.16.15GlowingHot ........................................ 796

17.16.16GradientBevel ....................................... 798

17.16.17Neon............................................. 799

17.16.18ParticleTrace ........................................ 800

17.16.19Textured........................................... 802

xiv

CONTENTS

18 Keys and Mouse Reference 805

18.1Help ................................................. 805

18.2Tools ................................................. 805

18.3File .................................................. 806

18.4Dialogs................................................ 807

18.5View ................................................. 808

18.6Edit.................................................. 809

18.7Layer ................................................. 809

18.8Select ................................................. 810

18.9Filters................................................. 810

18.10Zoomtool .............................................. 810

IV Glossary 811

V Bibliography 829

18.11Books................................................. 831

18.12Onlineresources .......................................... 831

VI GIMP History 835

.1 TheVeryBeginning......................................... 837

.2 TheEarlyDaysofGIMP ...................................... 837

.3 TheOnetoChangetheWorld................................... 838

.4 Version2.0.............................................. 838

.5 What’sNewinGIMP2.2? ..................................... 841

.6 What’sNewinGIMP2.4? ..................................... 842

.7 What’sNewinGIMP2.6? ..................................... 844

VII Reporting Bugs and Requesting Enhancements 849

.8 Makingsureit’saBug ....................................... 851

.8.1 FindaSpecificBug..................................... 852

.8.2 The Advanced Bug Search Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 852

.9 ReportingtheBug.......................................... 853

.10 What Happens to a Bug Report after you Submit it . . . . . . . . . . . . . . . . . . . . . . . 855

VIII GNU Free Documentation License 857

.11 PREAMBLE ............................................. 859

.12 APPLICABILITY AND DEFINITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 859

.13 VERBATIMCOPYING....................................... 860

.14 COPYINGINQUANTITY..................................... 860

.15 MODIFICATIONS ......................................... 861

.16 COMBININGDOCUMENTS ................................... 862

.17 COLLECTIONSOFDOCUMENTS................................ 862

.18 AGGREGATION WITH INDEPENDENT WORKS . . . . . . . . . . . . . . . . . . . . . . . 862

.19 TRANSLATION........................................... 862

.20 TERMINATION........................................... 863

.21 FUTURE REVISIONS OF THIS LICENSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 863

.22 ADDENDUM: How to use this License for your documents . . . . . . . . . . . . . . . . . 863

IX Eeek! There is Missing Help 865

Index 869

xv

List of Examples

16.1Cropmarks ............................................. 516

17.1 Simple “Slice” filter example output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 767

17.2Withseparateimagefolder .................................... 768

17.3Spacebetweentableelements................................... 768

17.4JavaScriptcodesnippet....................................... 769

17.5 Skipped animation for table caps (simplified HTML code) . . . . . . . . . . . . . . . . . . 769

xvii

Preface

GIMP User Manual Authors and Contributors

Content Writers Alex Muñoz (Spanish) , Alexandre Franke (French) , Alexandre Prokoudine (Russian) ,

Angelo Córdoba Inunza (Spanish) , Christian Kirbach (German) , Daniel Francis (Spanish) , Daniel

Mustieles (Spanish) , Daniel Winzen (German) , Delin Chang (Chinese) , Dimitris Spingos (Greek)

, Djavan Fagundes (Brasilian) , Enrico Nicoletto (Brasilian) , Felipe Ribeiro (Brasilian) , Guiu Ro-

cafort (Spanish) , Jiro Matsuzawa (Japanese) , Joe Hansen (Danish) , João S. O. Bueno (Brasilian)

, Julien Hardelin (French, English) , Kenneth Nielsen (Danish) , Kolbjørn Stuestøl (Norwegian)

, Marco Ciampa (Italian) , María Majadas (Spanish) , Milagros Infante Montero (Spanish) , Milo

Casagrande (Italian) , Piotr Drąg (Polish) , Rafael Ferreira (Brasilian) , Róman Joost (German, En-

glish) , Seong-ho Cho (Korean) , SimaMoto,RyōTa () (Japanese) , Sven Claussner (German, En-

glish) , Timo Jyrinki (Finnish) , Ulf-D. Ehlert (German) , Vitaly Lomov (Russian) , Willer Gomes

Junior (Brasilian) , Yuri Myasoedov (Russian)

Proof Reading Stéphane Poumaer (French) , Axel Wernicke (German, English) , Alessandro Falappa (Italian)

, Manuel Quiñones (Spanish) , Ignacio AntI (Spanish) , Choi Ji-Hui() (Korean) , Nickolay V.

Shmyrev (Russian) , Albin Bernharsson (Swedish) , Daniel Nylander (Swedish) , Patrycja Staw-

iarska (Polish) , Andrew Pitonyak (English) , Jakub Friedl (Czech, English) , Hans De Jonge (Dutch)

, Raymon Van Wanrooij (Dutch) , Semka Kuloviæ-Debals (Croatian) , Sally C. Barry (English) ,

Daniel Egger (English) , Sven Neumann (English, German) , Domingo Stephan (German) , Thomas

Lotze (German) , Thomas Güttler (German) , Zhong Yaotang (Chinese) , Calum Mackay (English)

, Thomas S Lendo (German) , Mel Boyce (syngin) (English) , Oliver Ellis (Red Haze) (English) ,

Markus Reinhardt (German) , Alexander Weiher (German) , Michael Hölzen (German) , Raymond

Ostertag (French) , Cédric Gémy (French) , Sébastien Barre (French) , Niklas Mattison (Swedish) ,

Daryl Lee (English) , William Skaggs (English) , Cai Qian () (Chinese) , Yang Hong () (Chinese)

, Xceals (Chinese) , Eric Lamarque (Chinese) , Robert van Drunen (Dutch) , Marco Marega (Italian) ,

Mike Vargas (Italian) , Andrea Zito (Italian) , Karine Delvare (French) , David ’Ilicz’ Klementa (Czech)

, Jan Smith (English) , Adolf Gerold (German) , Roxana Chernogolova (Russian) , Grigory Bakunov (Russian)

, Oleg Fritz (Russian) , Mick Curtis (English) , Vitaly Lomov (Russian) , Pierre PERRIER (French)

, Oliver Heesakke (Dutch) , Susanne Schmidt (English, German) , Ben (German) , Daniel Hor-

nung (English) , Sven Claussner (English, German)

Graphics, Stylesheets Jakub Steiner , Øyvind Kolås

Build System, Technical Contributions Kenneth Nielsen , Róman Joost , Axel Wernicke , Nickolay V.

Shmyrev , Daniel Egger , Sven Neumann , Michael Natterer (mitch) , Henrik Brix Andersen (brix)

, Thomas Schraitle , Chris Hübsch , Anne Schneider , Peter Volkov , Daniel Richard

xix

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Gimp Version 2.8 User manual

Gimp Version 2.8 User manual

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