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6 Vision functions User M anual HS-50 6.5 Teach Fiducial Software Version SR.501.xx 12/99 Issue U S 232 t I I t – On ce you hav e program med your trans formati on table you can qui t the optio n box by clic king on Acce…
User Manual HS-50 6 Vision functions
Software Version SR.501.xx 12/99 Issue US 6.5 Teach Fiducial
231
t IIt
Graphic presentation of Transform 5 6
In the diagram 6
– the abscissae (X axis) represent the input value range, subdivided into sections.
– the ordinates (Y axis) represent the output values with their color allocation.
Buttons 6
Å Accept
Click on the Accept button to save the settings. The option box will then close.
Å Cancel
With Cancel you can discard the settings. The option box will then close.
Å Help
With the Help button you can access explanatory material regarding the on-screen presenta-
tion.
Å Standard values
Click on the Standard values button if programming the transformation table fails. When you
select this option the transformation table will be preassigned default values. After this you can
start over with programming table 5.
Å Number input field
You can choose the number of sections
Å by entering the numerical value directly into the display field, or
Å by moving the scroll field in the scroll bar to the right or left using the mouse. In this way you
can run back and forth through the values range (1 - 5), or
Å by clicking on the left-hand or right-hand arrow on the scroll bar. In this way you can in-
crease or decrease the number of selections.
Programming the transformation table 6
– Specifying the output values
Position the mouse pointer over the ends of the transformation lines of each section. The ends
are marked with small horizontal lines. A vertical double arrow will then appear on the screen.
Click on the left-hand mouse key and move the arrow upwards or downwards. This will move
the selected end of the transformation line and the numerical value will be displayed at OUT
Begin or OUT End.
– Selecting the section limits
The graphical representation in Fig. 6.5 - 19
shows section limits with the ranges 0 - 126, 127 -
255 and so on. You can change these section limits if you wish. However limits 0 and 255 are
permanently allocated and cannot therefore be moved.
Position the mouse pointer on a section limit (but not 0 and 255). A horizontal double arrow will
appear on the screen. Hold down the lefthand mouse pointer and use it to drag the section limit
in the direction you want. The corresponding numerical value will be displayed at IN:.
6 Vision functions User Manual HS-50
6.5 Teach Fiducial Software Version SR.501.xx 12/99 Issue US
232
t IIt
– Once you have programmed your transformation table you can quit the option box by clicking
on Accept or Cancel. If you have not managed to obtain a satisfactory result, click on Default.
Notes on using the transformation tables to set the contrast sensitivity 6
– Select up to 3 sections.
– The range of values for the individual sections should be at least 75.
– Program the ranges so that no jumps occur at the range limits.
Set the contrast sensitivity so that the shape of the curve roughly corresponds to one of the
three following examples:
Setting the contrast sensitivity to suppress defective structures 6
Å Select the following settings for lighter PCBs or fiducials in order to suppress defective struc-
tures.
6
Fig. 6.5 - 20 Setting the contrast sensitivity to suppress defective structures
User Manual HS-50 6 Vision functions
Software Version SR.501.xx 12/99 Issue US 6.5 Teach Fiducial
233
t IIt
Setting the contrast sensitivity to intensify low-contrast fiducials 6
Å Select the following settings for low-contrast fiducials in order to intensify the contrast:
6
Fig. 6.5 - 21 Setting the contrast sensitivity to intensify low-contrast fiducials