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SP-5000M-CXP2 / SP-5000C-CXP2
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8.4. Gamma
This command is used to set gamma between gamma 0.45 and gamma 1.0 (OFF) in 16 steps.
The gamma value is an approximate value.
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Fig. 32 Gamma compensation
8.4.1 Linear and Dark Compression
SP-5000-CXP2 has a dark compression circuit to improve the signal-to-noise ratio in the dark portion
of the image.
Dark Compression 0: Dark Compression
1: Linear (Default)
Dark Compression
Function
Linear(Factory default)
No compression, Gamma=1.0
Dark Compression
Compress the signal level in the dark portion. It can improve
the signal to noise ratio, but on the other hand, the linearity
will be deteriorated.
8.5. Shading Correction
This function compensates for shading (non-uniformity) caused by the lens or the light source used.
This compensation can be performed even if shading issues are not symmetrical in horizontal and/or
vertical directions.
There are two methods of correction.
Flat shading correction:
The method to compensate the shading is to measure the highest luminance level in the
image and use that data as the reference. Luminance levels of other areas are then
adjusted so that the level of the entire area is equal. Compensation is performed using a
block grid of 20 blocks (H) x 16 blocks (V). Each block contains 128 x 128 pixels. The
complementary process is applied to produce the compensation data with less error.