GE Saba Quick start guide

Brand: GE

Model: Saba

Type: Quick start guide

GE Saba is an X-ray Character Recognition software that operates as a module within the SABA 3000 image evaluation system. It is designed to automatically recognize numeric characters from cast-on clear text information (e.g., mold numbers) in X-ray radioscopic images. The software ensures accurate character recognition by adhering to specific requirements, such as using the ISO Standard Type font, maintaining a minimum character height of 10mm, and ensuring a constant proportion between the type elevation and material thickness.

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SEIFERT SABA 3000 XCR

X-ray Character Recognition

XrayXray

GEIT-30068GB (6/04)

GEInspectionTechnologies.com

The SABA 3000 XCR software for X-ray Character Recognition acts as an additional

module within the SABA 3000 image evaluation system. It is designed for automatic

numeric character recognition.

The cast-on clear text information (e.g. mould numbers) is read from

the X-ray radioscopic image.

• Produced under ISO 9001 certified quality management system.

Application

Technical Data

Font ISO Standard Type in accordance with DIN 6776 B vertical, with the following deviation:

Space between numeric characters = three times the line width, user scalable,

starting from 10 mm height at 100 µm/pixel.

Font sample:

Allowable numeric characters: 0, 1, 2, 3, 4, 5, 6, 7, 8 ,9

Minimum values of numeric characters, based on an image resolution of 100 µm/pixel

and an X-ray tube current of 4 mA:

Height (nominal size) 10 mm

Width (at nominal size) 5 mm, the numeric character 1 having a 3 mm width

Line width 1 mm, (-0.1 mm, +0.4 mm)

Minimum distance between numeric characters 3 mm

Required type elevation (minimum values) with given material thickness

Material thickness [mm] 5 10 20 30

Type elevation [mm] 0.75 1 1.6 >2.4

Numeric character slant approximately 3°

Numeric character arrangement in the image rectangular relative to the image border (0°, 90°, 180°, 270°)

Deviation of the character string position from the nominal position ± 2 mm

Deviation of the rotation (within the string) from the nominal position ± 2 °

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Xray

In order to obtain accurate character rec-

ognition results the following prerequisites

have to be met:

• The font to be used is the ISO Stan-

dard Type for drawings in accordance

with DIN 6776 B vertical. This type is

characterized by high legibility.

• Each individual numeric character

must be distinct in shape to prevent

confusion with others.

• The distance between two numeric

characters must be three times the

line width (d).

• The numeric character height (h)

must be at least 10 mm (see

Figure 1).

• For serial inspection the numeric

characters in the image must always

appear in the same place.

• The arrangement of the numeric char-

acters in the image must be rectangu-

lar. A diagonal arrangement prevents

them from being recognized.

• The type must be highly contrastive.

The proportion of the type elevation

T1 to the material thickness T2 (see

Figure 2) must be constant through-

out the entire numeric character area

(see Figure 3) and be at least 1:10

given a numeric character height of

10 mm.

Example:

Given a 10 mm material thickness the

type elevation must be 1 mm (-0.2

mm, +0.8 mm).

• No further structures (e.g. cooling

ﬁns) must be in the numeric character

area as they will affect results.

• In the numeric character area the

material thickness must be constant.

• As the type elevation is limited for

reasons inherent in the casting pro-

cess, the numeric characters should

be placed in workpiece areas with the

least possible material thickness. This

is the only way to ensure a sufﬁciently

high contrast in the X-ray radioscopic

image.

Description

Figure 1 - Dimensions for 10 mm numeric character size

Figure 2 - Proportion T1/T2

Figure 3 - Numeric character area

The following points are important for X-ray character recognition on wheels:

• The strip must not contain any other information

except for the numeric characters.

• For all wheels of one type the strip must have the

same height position.

• The number of numeric characters (3 in the example

on the right) must be the same for all wheel types to

be inspected in one plant.

GE Saba Quick start guide

GE Saba Quick start guide

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