Image Rotation / Alignment

[ianders1]

I was thinking that maybe you could implement a feature that would allow one to rotate an image + or - 15?. I often find myself scanning film or large documents that are difficult to position precisely on the scanner and are off by a couple of degrees. Right now, I simply scan them in, and then free rotate them in PhotoShop, but this is a poor method, and results in some quality loss.

If there was a way to manually rotate an image (by degree) in the prescan window, that would really help.

If you got really crazy, maybe you could write some code that would find the corners and automatically align the image - I guess the same way its done for IT8 Calibration, where the image can be off by a few degrees. Then one could just press a button, and the image would automatically line up in the prescan window.

This would be a great time-saving and quality-enhancing feature for most of us out there.

-Ian A.

<font size=-1>[ This Message was edited by: ianders1 on 2001-11-08 19:26 ]</font>

[ilyons]

Ian,

Surely such a process would require that the software would need to recreate both the preview and scan using interpolation. Remember your scanner head/film moves in a straight line fashion. If the final image has been rotated by even 1 degree it has been interpolated. This will have an impact on both quality and scan time



Ian L

[ianders1]

Ian,

I appreciate that fact, but my thinking was that the image preview is lowres, so it would be easier to adjust there, than in PhotoShop. Also, if the interpolation was done within Silverfast/HDR, it could be accomplished in a High-Bit environment making it more accurate and less damaging. It would obviously take a lot more processing/time to do this, but I still think that it would be better than the current method of dealing with this. Besides it would be optional, in the way Descreening, and the (hopefully soon to be released) Film Grain Reduction feature are/will be.

-Ian A.