Shading Correction - IAI SP-20000M-PMCL User Manual

SP-20000-PMCL User Manual (Ver. 3.1)

Shading Correction

Related Setting Items:
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 i.n horizontal and/or
vertical directions.
The following shading correction modes are available on the camera
Flat Shading
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 20 blocks (H) x 15 blocks (V) and each block
contains 256 x 256 pixels. The complementary process is applied to produce the compensation data
with less error.
Color Shading (Color model only)
R-channel and B-channel properties are adjusted by using the G-channel shading properties as a
reference.
Cautions:
Proper correction is not possible under the following conditions.
If there is some area in the image with a video level less than 70%
l
If part of the image or the entire image is saturated
l
If the highest video level in the image is less than 300LSB (at 10-bit output)
l
JAI Custom
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Main Functions