full featured:
USAGE: fitsiodemosaicbayer
-i input_image
-p pattern (available: RGGB, GRBG, GBRG, BGGR)
-q 0 for bilinear Interpolation
-q 1 for gradient Interpolation
-q 2 for PPG Interpolation
-q 3 for WACP Interpolation
-c 2.21 1.00 1.51 1.006 for bayerfilter RGBG colorbalance
-o 256 for Offsetcorrection before RGBG colorbalance
-m 2 for 1-5 times artifact filter 3x3 of crominannce
-d 1000 for despeckle above level 1000 filter 1x3 of crominannce
-l with export of Luminance CIELab
-t with generates RAW testimage: R=50 G=101[2] B=75
PURPOSE: Demosaics a bayer matrix fits image into
three monochrome fits images for RGB.