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Module Documentation
Details and documentation about a specific module, including version and documentation (if available). Note that while links to perldoc.com and search.cpan.org are provided, the module may be part of a larger distribution. If you reach a File Not Found page on either site, please try the parent module.

Image::ExifTool::JPEGDigest

Name Image::ExifTool::JPEGDigest
Version 1.06
Located at /usr/share/perl5
File /usr/share/perl5/Image/ExifTool/JPEGDigest.pm
Is Core No
Search CPAN for this module Image::ExifTool::JPEGDigest
Documentation Image::ExifTool::JPEGDigest
Module Details Image::ExifTool::JPEGDigest

NAME

Image::ExifTool::JPEGDigest - Calculate JPEGDigest and JPEGQualityEstimate

SYNOPSIS

This module is used by Image::ExifTool

DESCRIPTION

This module contains a lookup for values of the JPEG DQT digest, allowing some image identification from JPEG data alone. It also calculates an estimated JPEG quality if requested.

AUTHOR

Copyright 2003-2022, Phil Harvey (philharvey66 at gmail.com)

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

REFERENCES

https://github.com/ImageMagick/ImageMagick/blob/master/coders/jpeg.c

ACKNOWLEDGEMENTS

Thanks to Jens Duttke for most of the work that went into this module, and to Franz Buchinger for the values he added.

SEE ALSO

JPEG Tags in the Image::ExifTool::TagNames manpage, Image::ExifTool(3pm)

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