Optical Character Recognition Plugin for SpamAssasin
4.00
The master branch work with Tesseract versions 4. If you are on an older distributions (specifically Debian Jessie). Checkout 3.00 for systems with Tesseract 3.X.
Enable in your SpamAssassin config:
loadplugin Mail::SpamAssassin::Plugin::TesseractOcr
Override default settings:
ifplugin Mail::SpamAssassin::Plugin::TesseractOcr
tocr_setting_name value
endif
This plugin parses text from images within the body of an email and passes any content found back to the parent SpamAssassin process. This allows for the content to be tested against standard SpamAssasin rules.
tesseract-ocr => 4.00 opencv-dev => 2.00 spamassassin => 3.4.0 Time::HiRes => '1.9726' POSIX => '1.3803'
Debian: sudo apt-get install tesseract-ocr libopencv-dev // Time::HiRes and POSIX are included with Perl
pkg-config >= 0.28
Debian: sudo apt-get install pkg-config
git clone https://github.com/MailCleaner/TesseractOcr.git
cd TesseractOcr
perl Makefile.PL INSTALLSITEARCH=/proper/path/of/your/perl/libraries
make
sudo make install
spamassassin --siteconfigpath=/conf/dir/which/includes/TesseractOcr.cf/ -t --debug TesseractOcr < example_email.eml
tocr_enabled (0|1)
Whether to use TesseractOcr, if it is available.
tocr_preprocess (0|1)
Whether to do image preprocessing to improve accuracy, or just convert to TIF.
tocr_data_dir (string)
Tessdata language training directory ("--tessdata-dir " option).
tocr_langs (string)
Language data to use ("-l " option).
tocr_msg_timeout (int)
Timeout duration for an entire message.
tocr_img_timeout (int)
Timeout duration for a single image. Used once when converting the image and once when scanning the image.
tocr_skip_(jpg|png|gif|bmp|tif|pdf) (0|1)
Disable scanning of individual image types.
tocr_(min|max)_size (int)
Image size limit (bytes).
tocr_(min|max)_(x|y) (int)
Image height/width limit (pixels).
tocr_(min|max)_area (int)
Image area (x*y) limit (pixels).
John Mertz <john.mertz at mailcleaner.net>
Copyright 2020 Fastnet SA
This program is released under the Apache Software License, Version 2.0