Blemish Compensation - IAI SP-20000M-CXP2 User Manual

Before adjustment
Note: Under the following conditions, the shading correction circuit may not work properly.
If there is some area in the image with a video level less than 70%

If part of the image or the entire image is saturated

If the highest video level in the image is less than 300LSB (at 10-bit output)

Table – 60 Associated GenICam register information
GenICam Name
Shading Mode
(Color Model Only)
Perform Shading Correct
Shading Mode
8.6

Blemish compensation

The SP-20000-CXP2 has a blemish compensation circuit. This function compensates blemishes on the
CMOS sensor (typically pixels with extremely high response or extremely low response). This applies to
both monochrome and color versions. Pixels that fulfill the blemish criteria can be compensated by
averaging the data from pixels in both adjacent columns and, in the case of the SP-20000C-CXP2, the
defective pixels can be compensated by averaging the data from the same Bayer color pixels in adjacent
columns. The number of pixels that can be compensated is up to 1000 pixels.
If several defective pixels occur in series, 3 pixels in monochrome and 2 same color pixels in color can be
compensated.
SP-20000M-CXP2 / SP-20000C-CXP2
Fig. 42 Concept drawing of Color shadingcorrection
Access
R/W
R/W
Blemish Compensation Principle
B/W
Color
Fig. 43 Blemish compensation
After adjustment
Values
Flat Shading
Color Shading
WO True
Off
User1
User2
User3
Defective Pixel
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Category
JAI-Custom
JAI-Custom
JAI-Custom