blitzDrt
Tool to correct perspective distortion
- Does not correct verticals (column separators, table lines) yet.
- Uses Blitz++ and ImageMagick++ library.
- "drt" comes from "discrete radon transformation", the intermediate result when rotating the image by -x° to x° to find optimal deskewing angle for top and bottom of the page.
Installation
Requires ImageMagick++, libfft3, blitz and boost_program_options.
ImageMagick++, libfftw3 and boost_program_options can be installed with make deps-ubuntu.
If blitz is not available in your distro, you can build from source with make install-blitz (might require make install-cmake first for an up-to-date CMake).
Run make install to build and install the tool, it will be available as productiveDrt in your $PATH.
Uninstall with make uninstall
Usage
Example: ./productiveDrt --if input.png --of output.png --doTrans
Help: ./productiveDrt --help
Tries to detect if text is on page - to prevent deskewing of e. g. architectural plans or hatchings.
Warning: output files are not suitable for archival. Metadata could be lost (imagemagick).