Vision Sensor SBSI/SBSC-EN, 8062650 - 1607b - 13/09/2016
Page 109
Vision Sensor Manual
Fig. 100: Contour, application example, negative result
If now the same contour check is made at a position of the object where the metal contact is missing, the
according edges / contour is not found. The detector gives a negative result.
4.6.3.5 Contrast detector
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Contrast application (Page 111)
This detector determines the contrast in the selected search area. Therefore all pixels inside the search
area are evaluated with its grey value and the contrast value is calculated. If the contrast value is inside the
limits set in parameter threshold the result is positive. The position of the single bright or dark pixels
here is not relevant. The contrast is just depending on the bandwidth between darkest and brightest
pixels and their quantity. Highest contrast value with 50% grey value “0” (= black) AND 50% grey value
“255” (=white)
Summary of Contents for SBSC-EN
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