KAI-16070 Datasheet, PDF (19/48 Pages) ON Semiconductor – Interline CCD Image Sensor

KAI−16070
Example for major bright field defective pixels:
• Average value of all active pixels is found to be
924 mV
• Dark defect threshold: 924 mV * 15% = 138 mV
• Bright defect threshold: 924 mV * 15% = 138 mV
• Region of interest #1 selected. This region of interest is
pixels 13, 13 to pixels 147, 147.
♦ Median of this region of interest is found to be
918 mV.
♦ Any pixel in this region of interest that
is ≥ (918 + 138 mV) 1062 mV in intensity will be
marked defective.
♦ Any pixel in this region of interest that
is ≤ (918 − 138 mV) 780 mV in intensity will be
marked defective.
• All remaining sub regions of interest are analyzed for
defective pixels in the same manner. Any remaining
factor of pixels less than 135 pixels that are not covered
by this moving ROI is placed over the remaining pixels
at the active area boundary. A portion of pixels that
were tested in the previous ROI will be retested to keep
the test ROI at a full 135 by 135 pixels.
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