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6 Vision functions User Manual HS-50 6.5 Teach Fiducial Software-V ersion 5.01 E dition 01/99 226 – the teach com mand i s given , and – hea der and fo oter with color table option , fiduc ial numb er and the uniqu eness…
User Manual HS-50 6 Vision functions
Software-Version 5.01Edition 01/99 6.5 Teach Fiducial
225
To make it easier for you to assess the range of brightness or the contrast, these gray-scale values
have been converted with the help of transformation tables into color as is shown below:
NOTE
In order to achieve a good uniqueness value the contrast difference between the fiducial and its
surroundings should be at least 75. For example, if the background is green the fiducial should be
orange.
If the contrast is unsatisfactory you can select in the menu between five pre-programmed trans-
formation tables in order to obtain a color image which is capable of supplying the necessary in-
formation. In addition, you can also program a transformation table yourself.
NOTE
When the color presentation is changed the fiducial will be taught at the same time.
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When you select this options,
– the menu closes,
– the video image is displayed,
Gray scale Allocated color
0black
30 violet
50 blue
77 blue-green
100 green
127 brown
150 red
175 orange
200 yellow
255 white
Tab. 6.5.1
6 Vision functions User Manual HS-50
6.5 Teach Fiducial Software-Version 5.01 Edition 01/99
226
– the teach command is given, and
– header and footer with color table option, fiducial number and the uniqueness value are dis-
played.
Å Press (VF to quit this option.
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When this option is activated the &RQWUDVWVHQVLWLYLW\WUDQVIRUPoption box opens.
Fiducial No. = 8 Uniqueness = 70
Disp. with transform 2
User Manual HS-50 6 Vision functions
Software-Version 5.01Edition 01/99 6.5 Teach Fiducial
227
You can select the following parameters:
– Number of sections which the transformation table should have: a number between 1 and 5
– Choice of paired values: with 5 sections 10 value pairs are permitted.
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Numerical presentation of Transform 5
The numerical values are indicated in the upper part of the option box. These are:
Section: Number of sections
OUT Begin: OUT End: Ranges of values for the transformation of the individual sections
IN: Range limits of the individual sections
Graphic presentation of Transform 5
In the diagram
– the abscissae (x axis) represent the input value range, subdivided into sections.
– the ordinates (y axis) represent the output values with their color allocation.
Scroll field
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