NAME¶
Ocrad - command line text recognition tool
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. 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.
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>
REPORTING BUGS¶
Report bugs to bug-ocrad@gnu.org
Ocrad home page:
http://www.gnu.org/software/ocrad/ocrad.html
General help using GNU software:
http://www.gnu.org/gethelp
COPYRIGHT¶
Copyright © 2012 Antonio Diaz Diaz. License GPLv3+: GNU GPL version 3 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.
SEE ALSO¶
The full documentation for
Ocrad is maintained as a Texinfo manual. If
the
info and
Ocrad programs are properly installed at your site,
the command
- info Ocrad
should give you access to the complete manual.
