following the advice by Fraser et al. (2005) I have assigned one of my scanner profiles created with Argyll to a GrangerRainbow image. The profile was for a Fuji slide using colprof with the options -qh -Zp -as -bn.
There is a sharply defined rectangular range at upper left, which should not be there (see attachment). It vanishes if I use the option -ax, where the Rainbow image looks as expected.
Is there an explanation where this sharp devision comes from?
Description: JPEG image