unpaper扫描图片纠偏去黑边linux

unpaper - post-processing scanned and photocopied book pages

Licensed under the GNU General Public License (GPL). This software comes with no warranty.
Written by Jens Gulden 2005-2007 - [e-mail].

Overview
Download
Usage
Options
User Documentation
Examples
Donation
Related Links

Overview

unpaper is a post-processing tool for scanned sheets of paper, especially for book pages that have been scanned from previously created photocopies. The main purpose is to make scanned book pages better readable on screen after conversion to PDF. Additionally, unpaper might be useful to enhance the quality of scanned pages before performing optical character recognition (OCR). unpaper tries to clean scanned images by removing dark edges that appeared through scanning or copying on areas outside the actual page content (e.g. dark areas between the left-hand-side and the right-hand-side of a double- sided book-page scan). The program also tries to detect disaligned centering and rotation of pages and will automatically straighten each page by rotating it to the correct angle. This process is called "deskewing". Note that the automatic processing will sometimes fail. It is always a good idea to manually control the results of unpaper and adjust the parameter settings according to the requirements of the input. Each processing step can also be disabled individually for each sheet. Input and output files can be in either .pbm , .pgm or .ppm format, thus generally in .pnm format, as also used by the Linux scanning tools scanimage and scanadf. Conversion to PDF can e.g. be achieved with the Linux tools pgm2tiff, tiffcp and tiff2pdf.

Download

unpaper is available for download at http://download./unpaper/unpaper-bin-0.3 .tar.gz.

Source-only versions and older releases are available in the distribution archive of the project development site.

You may also want to browse the source-code online in the CVS archive.

Usage

Usage: unpaper [options] <input-file(s)> <output-file(s)>

Filenames may contain a formatting placeholder starting with '%' to insert a page counter for multi-page processing. E.g.: 'scan%03d.pbm' to process files scan001.pbm, scan002.pbm, scan003.pbm etc.

Read more http://unpaper.