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https://travis-ci.org/dayflower/p5-Image-JPEG-EstimateQuality)
# NAME
Image::JPEG::EstimateQuality - Estimate quality of JPEG images.
# SYNOPSIS
use Image::JPEG::EstimateQuality;
jpeg_quality('filename.jpg'); # => 1..100 integer value
jpeg_quality(FILEHANDLE);
jpeg_quality(\$image_data);
# DESCRIPTION
Image::JPEG::EstimateQuality determines quality of JPEG file.
It's approximate value because the quality is not stored in the file explicitly.
This module calculates quality from luminance quantization table stored in the file.
# METHODS
- jpeg\_quality($stuff)
Returns quality (1-100) of JPEG file.
scalar: filename
scalarref: JPEG data itself
file-glob: file handle
# SCRIPT
A script `jpeg-quality` distributed with the module prints the quality of a JPEG specified on the command line:
jpeg-quality image.jpg
90
# LICENSE
Copyright (C) ITO Nobuaki.
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
# AUTHOR
ITO Nobuaki <
[email protected]>
