Illumination with correct intensity and direction can help solving even very complicated inspection and measurement
problems by hiding unnecessary information and by enhancing the contrast where it is needed. The 'wave and look'
approach used widely in the vision industry requires knowledge about different illumination techniques and the
measurement problem. One illumination is not optimal for all tasks performed using one vision system and so even more
complex illumination combinations can be expected, particularly on small-batch production lines. We describe
approaches for producing flexible light sources for machine vision purposes. Our devices allow one to change the scene
illumination by software. Often only one programmable light source is needed per one vision system despite very
different illumination needs. We also describe an automated tuning approach that controls programmable light sources
on-line to correct the image seen by the sensor to maximize the illumination uniformness, contrasts, or even the part
measurement robustness. The paper also shows the results of test cases and discusses ways to further improve them.
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