Dalsa CALIBIR 640 GigE, Руководство пользователя

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Calibir 640 GigE IR Camera User's Manual Features and Configuration Options • 41
The following examples show the effect of varying contrast settings. The histograms reflect that
with larger contrast values, pixel values are stretched to the lower and upper limits (0 and 255,
respectively), with increasing saturation.
Note that the recommended settings (between 60 and 100) provide the greatest dynamic
range while minimizing saturation (as seen in the histograms below for contrast settings
of 50 and 100).
Table 7: Image Range Compression Contrast Examples
Image
8-bit image histogram
Contrast = 1; Limit = 1
Average value = 127.09; Standard Deviation = 29.27
Contrast = 50; Limit = 1
Average value = 127.08; Standard Deviation = 36.50
Contrast = 100; Limit = 1
Average value = 126.92; Standard Deviation = 47.61