SP-5000M-GE2 / SP-5000C-GE2
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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.
Adjustable range
Less 30%
Fig. 49 Flat shading correction concept drawing
Color shading correction (For SP-5000C-GE2 only):
In this case, R channel and B channel are adjusted to match with G channel characteristics.
The block grid for compensation is 20 blocks (H) x 16 blocks (V). Each block contains 128 x
128 pixels and the complementary process is applied to produce the compensation data
with less error.
Before adjustment After adjustment
Fig.50 Color shading correction concept drawing
