In this mode, after OM source-detection has been performed on a mosaiced sky-image, omqualitymap will set the quality flags of each source in the detection source-list using information from the QUALITY image stored in the sky-image file.
The program loops through each source and sets a particular bit of the quality flag if any of the 9 QUALITY-image pixels within a box centred on the source have that bit set.
It will then either create a new source-list file, or modify the input source-list file, depending on whether the parameter outset is the same as the input parameter srclistset or not.