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 2003-2016, Phil Harvey (phil at owl.phy.queensu.ca)
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
REFERENCES
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 Image::ExifTool::TagNames, Image::ExifTool(3pm)