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AM-800GE / AB-800GE
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11.10. Shading Correction
This function compensates for shading caused by the lens or the light source used.
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 128 pixels(H) x 128 pixels(V) and the complementary process is
applied to produce the compensation data with less error.
Fig. 59 FFC compensation concept drawing
Color shading correction (For AB-800GE 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.
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)
11.11. Bayer color interpolation (Only for AB-800GE)
This function is available only for AB-800CL. The AB-800CL uses a CCD with an RGB
Bayer pattern. If the Bayer color interpolation is not used, the following RAW data
can be output.
Gr
R
Gr
R
B
Gb
B
Gb
Gr
R
Gr
R
Gr
R
B
Gb
Gr
R
B
Gb
B
Gb
B
Gb
B
Gb
Gr
R
B
Gb
Gr
R
B
Gb
Gr
R
B
Gb
Gr
R
Fig. 60 Bayer pattern
Adjustable range
Less 30%
Summary of Contents for AB-800GE
Page 97: ...AM 800GE AB 800GE 94 b Image Format Control c Acquisition Control d Digital IO Control...
Page 98: ...AM 800GE AB 800GE 95 e Counter And Timer Control f Event Control...
Page 99: ...AM 800GE AB 800GE 96...
Page 100: ...AM 800GE AB 800GE 97 g Analog Control h LUT Control i Transport Layer Control...
Page 101: ...AM 800GE AB 800GE 98 j User Set Control k Action Control l JAI Custom Control...
Page 102: ...AM 800GE AB 800GE 99...