After some days using hp4370 scanner, I've made necessary changes in hp3900 backend to scan images successfully. At least in resolutions lower than 1200 dpi. Calibration process is not completed and its implementation in hp4370 is different from hp3970 and hp4070 so image quality isn't as good as it should be.
Due to it's soon to release a new version yet because some code must be improved, HP4370 users can test backend downloading sources from SVN server. https://sourceforge.net/projects/hp3900-series/ Debian users can test stand-alone compiled version located at: http://jkdsoftware.dyndns.org/download.php?id=100 So, I think, next SANE release could support officially: HP ScanJet 3970 HP ScanJet 4070 Photosmart HP ScanJet 4370 Regards Jonathan Bravo Lopez
