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 2003-2018, 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.
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)