EL-2800M-PMCL / EL-2800C-PMCL
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8.4. Gamma
This command is used set gamma between gamma 0.45 and gamma 1.0 (OFF).
The gamma value is an approximate value.
Fig. 38 Gamma compensation
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. The block for compensation is 24
pixels (H) x 18 pixels (V) and the complementary process is applied to produce the
compensation data with less error.
Fig. 39 Flat shading correction concept drawing
Color shading correction (For EL-2800C only):
In this case, R channel and B channel are adjusted to match with G channel characteristics.
The block for compensation is 24 pixels (H) x 18 pixels (V) and the complementary process is
applied to produce the compensation data with less error.
Adjustable range
Less 30%