[sane-devel] Scan Correction Program! :)

Ekkehard Morgenstern ekkehard at ekkehardmorgenstern.de
Sun May 11 12:02:28 UTC 2008

Hi guys,

today I wrote a small program to auto-correct color scans made by SANE.
It is especially useful for scanning paper.

Have a look at it here: 

The archive file contains ANSI C source code that works with libpng,
description (readme.txt) and BSD license (license.txt), as well as a
binary for OpenBSD 4.3 and a simple makefile. Size-reduced sample images
are also included to see how it works.

The program works like this:
- First, you scan a blank sheet of paper, using a SANE frontend, like  
  XSane (with default gamma correction!). This gives you a file that
  contains the data for a white sheet.
- Then, you scan the sheet of paper you want to correct, also with the
  default gamma correction.
- After that, you run the scancorrect program. It creates a new image
  based on the two input files.

It's a very simple idea, but the concept could be integrated into a SANE
driver, SANE itself, or a SANE frontend. :)



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