Hi Ernst,
The printing is done through Qimage. However cropping in Qimage is a pain. Does Qimage have a function to assign a profile automatically?
Print to file. Use the printer profiling route and select AdobeRGB there as the output profile. That's when you start from the original with the AdoberGB assigned and have the crop done + profile assigned in Qimage
If you want to assign AdobeRGB to the files you already cropped (and lost their colorspace, I hope your program didn't do more than stripping the profile) then you should set the Qimage colorspace assigning to AdobeRGB (default is sRGB) and the printer profile = output profile to AdobeRGB. Or both to Adobe 1998 if that difference matters.
On the cropping, if it has to be done per image in a different way then it isn't the fastest route. But in batch mode, the output ratio aspect set and either an auto crop or auto on length adaption etc and resolution set at 300 PPI for instance it should do well.
met vriendelijke groeten, Ernst Dinkla
New: Spectral plots of +180 inkjet papers:
http://www.pigment-print.com/spectralplots/spectrumviz_1.htm