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Request #69797 Add phash metric for Imagick::compareImages
Submitted: 2015-06-11 12:08 UTC Modified: 2015-06-16 11:47 UTC
Votes:1
Avg. Score:5.0 ± 0.0
Reproduced:0 of 0 (0.0%)
From: ch1902a at gmail dot com Assigned: danack (profile)
Status: Closed Package: imagick (PECL)
PHP Version: 5.6.9 OS:
Private report: No CVE-ID: None
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 [2015-06-11 12:08 UTC] ch1902a at gmail dot com 
Description:
------------
ImageMagick 6.8.8.3 supports a perceptual hash metric for comparing images: http://www.imagemagick.org/discourse-server/viewtopic.php?t=24906 but there is no Imagick::METRIC_PHASH constant in PHP so I'm guessing it's not currently supported. Could you please add support for the perceptual hash metric to Imagick::compareImages() and any other missing metrics given by compare -list metric.

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 [2015-06-13 21:51 UTC] danack@php.net
-Assigned To: +Assigned To: danack
 [2015-06-13 21:56 UTC] danack@php.net 
I'll add it to the next version.

Because the constants are just numbers, which Imagick doesn't check before passing onto ImageMagick, you should be able to use it by just setting the appropriate value.

Which should be 9 as it's the 10th element (zero based counting) of the enum here:

https://github.com/ImageMagick/ImageMagick/blob/7922e0cc8b7e19b7d010161cdb6f7b12b9a05375/MagickCore/compare.h#L38
 [2015-06-16 11:47 UTC] danack@php.net
-Status: Assigned +Status: Closed
 [2015-06-16 11:47 UTC] danack@php.net 
It has been added and is available in master, and will be in the next release:
https://github.com/mkoppanen/imagick/blob/master/imagick_helpers.c#L1085
 
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