The OM CCF component BadPix is read and the entries of bad pixels
falling into the specified area are extracted.
A value of zero is assigned to defect free pixels in the output map.
Bad pixels are marked in the output map by non-zero values.
The value assigned to a bad pixel encodes the type of defect.
The mapping between CCF description and the integer encoding used in the
output badpixel map is as following: