SYNOPSIS
ocrad [,options/] [,files/]DESCRIPTION
GNU Ocrad is an OCR (Optical Character Recognition) program based on a feature extraction method. It reads images in pbm (bitmap), pgm (greyscale) or ppm (color) formats and produces text in byte (8-bit) or UTF-8 formats. The pbm, pgm and ppm formats are collectively known as pnm.Ocrad includes a layout analyser able to separate the columns or blocks of text normally found on printed pages.
OPTIONS
- -h, --help
- display this help and exit
- -V, --version
- output version information and exit
- -a, --append
- append text to output file
- -c, --charset=<name>
- try '--charset=help' for a list of names
- -e, --filter=<name>
- try '--filter=help' for a list of names
- -f, --force
- force overwrite of output file
- -F, --format=<fmt>
- output format (byte, utf8)
- -i, --invert
- invert image levels (white on black)
- -l, --layout
- perform layout analysis
- -o, --output=<file>
- place the output into <file>
- -q, --quiet
- suppress all messages
- -s, --scale=,[-]/<n>
- scale input image by [1/]<n>
- -t, --transform=<name>
- try '--transform=help' for a list of names
- -T, --threshold=<n%>
- threshold for binarization (0-100%)
- -u, --cut=<l,t,w,h>
- cut input image by given rectangle
- -v, --verbose
- be verbose
- -x, --export=<file>
- export results in ORF format to <file>
If no files are specified, ocrad reads the image from standard input. If the -o option is not specified, ocrad sends text to standard output.
Exit status: 0 for a normal exit, 1 for environmental problems (file not found, invalid flags, I/O errors, etc), 2 to indicate a corrupt or invalid input file, 3 for an internal consistency error (eg, bug) which caused ocrad to panic.
REPORTING BUGS
Report bugs to [email protected]Ocrad home page: http://www.gnu.org/software/ocrad/ocrad.html
General help using GNU software: http://www.gnu.org/gethelp
COPYRIGHT
Copyright © 2014 Antonio Diaz Diaz. License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.