Debayering the images in kfitsviewer is not supported since the CCD for the DSI Color (ICX254AK) uses a complementary color filter array rather than the "standard" RGGB CFA. The CMYG CFA was used on some of these older cameras but is not really used anymore.

I don't have pixinsight, but a little searching seems to indicate that it can debayer these images.

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