This is original deskew plug-in for GIMP written by Karl Chen back in 2007. The plugin's homepage has been offline for a very long time, and the plug-in needed some fixes. So I went ahead and saved it from http://ccux-linux.de/pdb/index.php?pdetail=6271 where an src.rpm still had the original tarball. Below goes slightly adjusted original contents of README. GIMP Deskew Plug-In =================== Copyright (C) 2007 Karl Chen <quarl@cs.berkeley.edu> http://www.cubewano.org/gimp-deskew-plugin/ Distributed under GPL v2+ (see COPYING). Uses Radon skew detection algorithm and code from the PageTools project (http://sourceforge.net/projects/pagetools). kale4@users.sourceforge.net, yet@users.sourceforge.net. Usage ===== Click Layer => Transform => Deskew. Gimp will auto-straighten ("deskew") the image. Installation ============ Building/installation procedure depends on where you got the source code from. If you got source code from Git repository, ./autogen.sh make make install If you got a tarball with a version, ./configure make make install For both ./autogen.sh and ./configure you can use --prefix=INSTALL_PATH, where a typical installation path is /usr. By default /usr/local is used.