Hi I have a snapscan 310, which has an optical resolution at 300dpi. > Thus the xsane button only proposes resolution up to 300dpi. But I > know that with a good interpolation, one can scan with this scanner > up to 1200dpi. Does anybody know how interpolation works? Is it a job > done by the scanner itself, or a soft post-prossessing that can be > done with gimp? Any comment welcome ! Alex
One case that I can imagine is that the scanners' CCD has a resolution of 300 dpi (=horizontal resolution), but can do motor steps with a higher resolution (=vertical resolution = e.g. 1200 dpi).(=vertical). In that case I can imagine that it makes sense to interpolate to 300x1200 dpi. Bertrik Thanks for answer bertrik Ok, I begin to anderstand. So the interpolation is vertical. The motor does smaller steps, and scans at 300dpi, but with the steps at 1200dpi, there is a soft post-processing to get an image at 300x1200dpi. Is there any way with sane to tell the motor of the scaner to do smaller steps? I should get then an image 4x longer then the normal one. Alex
