JAI EL-2800M-USB User Manual
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Contents
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EL-2800M-USB / EL-2800C-USB- 57 -Fig. 44 Flat shading correction concept drawingColor shading correction (For EL-2800C only):In this case, R channel and B channel are adjusted to match with G channel characteristics.The block grid for compensation is 15(H) x 12(V) blocks and the complementary process isapplied to produce the compensation data with less error.Before adjustment After adjustmentFig.45 Color shading correction concept drawingNote: 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)8.6. Blemish compensationThe EL-2800M-USB and EL-2800C-USB have a blemish compensation circuit. This functioncompensates blemishes on the CCD sensor (typically pixels with extremely high response orextremely low response). This applies to both monochrome and color versions. Pixels that fulfill theblemish criteria can be compensated by adjacent pixels in both columns and, in the case of theEL-2800C-USB, the defective pixels can be compensated by the same Bayer color pixels in bothadjacent columns. The number of pixels that can be compensated is up to 300 pixels.Adjustable rangeLess 30% |
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