OK, here is the latest dekeystoning program. At the bottom of the post is qrpc-1.0.zip. Unzip it, and follow the instructions in README.TXT, which are reproduced here.
Note that you will need Java version 6.
Print out the QR registration image.jpg file at 100%. The QR codes should be three inches (or about 76 mm) apart. Next, cut out, leaving about 1/2 inch (or about 20 mm) of space from the edges of the QR codes. Make sure you get the bottom edge straight. Finally, paste or tape the page to something reasonably flat. A pane of glass is ideal. Make sure the bottom edge of the page lines up with the bottom edge of your flat item.
Now, do it again for the other side of your platen. You should now have two registration plates.
Now, position your camera on your book, setting up the location, orientation, and zoom. Before you take first picture, place the registration plates on top of the platen, and look through the camera viewfinder to make sure all four QR codes are visible. Take an image.
Now remove the registration plates, and scan your book normally.
Whenever you change the position, orientation, or zoom of your camera, you will need to add the registration plates again before resuming scanning. Also, even if you did not change your camera setup, you might want to add the registration plates every 50 or 100 pages or so.
When you are done, place the left and right images in separate directories. Then point the QR Perspective Corrector at the left image directory, then at the right image directory:
java -jar <directory where qrpc.jar is>/qrpc.jar <directory where source images are>
You should end up with files in the same directory where the source images are, except that the registration images are prepended with "qr " while the corrected images are prepended with "dekey ".
Now you should be able to run your images through Scan Tailor.
For support, ask for it in the Software section of the diybookscanner.org forums.
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