Here are the sample images.
black background, greyscale - does not deskew:
http://www.dvdorganizer.com/pics/receip ... ckback.jpg
same image, but put 8.5/11 white paper behind it before scan, so white background, greyscale - deskews fine:
http://www.dvdorganizer.com/pics/receip ... teback.jpg
black background, B/W image, saved as png - deskews fine:
http://www.dvdorganizer.com/pics/receip ... ckback.png
black background, B/W image, saved as tif lzw - attempts to deskew, but does so incorrectly:
http://www.dvdorganizer.com/pics/receip ... ckback.tif
At first I thought it seemed that a white receipt scanned in greyscale with a black background causes your deskew alogorithmn to be off.
But then I tried a different sample image. In this case the black backgound causes no issues but the white does. I will upload these soon as well.
Ok, here are the other samples. Now in most cases hitting the deskew button does nothing. So perhaps, you can see if the skew angle returned by this function returns zero and perhaps adjust some parms to allow for it to work.
All these samples were also tried within PaperScan with its native aquire with same results. The files here are saved with photoshop without any scanner adjustments applied and when imported into PaperScan provide the same results.
sample1, white background, color image, will not deskew:
http://www.dvdorganizer.com/pics/sample ... teback.jpg
sample1, white background, greyscale image, will not deskew:
http://www.dvdorganizer.com/pics/sample ... teback.jpg
sample1, black background, color image, deskews fine:
http://www.dvdorganizer.com/pics/sample ... ckback.jpg
sample1, black background, greyscale image, deskews fine:
http://www.dvdorganizer.com/pics/sample ... ckback.jpg
BTW, I signed up for your beta testing of your PaperLight beta, perhaps you can put in a good word that I am a user that can provide good feedback as I would love to participate in the private beta.
I am unsure about purchasing the product with these issues since its priced at $150 which is a but high for just an average home user like myself using it for just receipts. But you do have this rotate angle rotation dialog which is a life saver, so I am still giving it some thought as I finish evaluating some other apps.