Shading Correction - JAI GO-5100MP-PGE User Manual

Shading Correction

The shading correction is a function that corrects non-uniformity (i.e., shading) in the amount
of light generated by the lens and lighting equipment. Using this function allows correction
even if top, bottom, left, and right shading is not symmetrical in relation to the center of the
screen (H, V).
The size of the correction block is 20 (H) × 17 (V) blocks and calculation errors in the
correction data are minimized due to the small interpolation block. Each block is 128 × 128
pixels.The total size of the blocks is 2560 (H) × 2176 (V), but the actual number of effective
pixels for the camera is 2464 (H) × 2056 (V). The ineffective peripheral areas will be deleted
internally on the camera automatically.
The following shading correction mode is available on the camera.
■ FlatShading
Correction is performed using the area of the screen with the highest brightness level as the
reference, and adjusting the brightness levels of the other areas to match this level.
Pre-correction
Caution
Proper correction is not possible under the following conditions.
• If an area with a brightness level that is more than 30% less than the reference level exists
within the screen
• If the brightness level is saturated in parts or all of the screen
• If the area in the screen with the highest brightness level is 300 LSB or less
(during 10-bit video output)
Post-correction
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GO-5100MP-PGE