Smartek UCC User Manual page 134

Gamma curves are defined by the following formula, where x is the percentage input luminance, y the
percentage output luminance, a the darkest percentage brightness value (ideally 0), b the digital gain and c
the gamma.
Further x can be determined based on the bit depth n by the following formula:
The appropriate gamma curve can be determined by capturing an image of a calibrated gray scale showing
a linear progression over a brightness of 0% to 100%.
Gamma Correction in CameraSuite SDK
In the CameraSuite SDK the ImageProcAPI provides the programming interface for setting and executing
the gamma correction algorithm. The bit depth and image types supported are shown in Table 57. For a
detailed description on how to use the digital offset, gain and gamma correction feature please refer to the
CameraSuite API Help located in the doc folder of the CameraSuite SDK installation directory.
Supported image input
Table 57: Gamma Correction - supported bit depth and image type
Monochrome
Raw Bayer
Color RGB
c
y = a + bx
pixelvalue
x =
n
2
−1
Supported bit depth
8 bit per channel
128
User Manual - twentynine
16 bit per channel
SMARTEK Vision | User Manual - twentynine | Doc. v1.0.2