Package: findimagedupes
Version: 2.18
Severity: wishlist
Tags: patch upstream
Hi all!
I want to offer the patch, significantly improves speed of image sampling.
It's very simple: near line 483 replace 'Modulate' call with 'Quantize'.
>From the manpage:
==============
3) Grayscale by reducing saturation.
==============
Original line:
> try $image->Modulate(saturation=>-100);
New line:
> try $image->Quantize(colorspace => 'gray');
'Quantize' works 2.5x times faster according to my benchmarks.
Patch against version 2.18 in attachment. Thanks.
-- System Information:
Debian Release: 7.6
APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)
Kernel: Linux 3.2.0-4-amd64 (SMP w/8 CPU cores)
Locale: LANG=ru_RU.UTF-8, LC_CTYPE=ru_RU.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages findimagedupes depends on:
ii libc6 2.13-38+deb7u3
ii libfile-mimeinfo-perl 0.16-1
ii libgraphics-magick-perl 1.3.16-1.1
pn libinline-perl <none>
ii perl 5.14.2-21+deb7u1
ii perl-base [perlapi-5.14.2] 5.14.2-21+deb7u1
findimagedupes recommends no packages.
findimagedupes suggests no packages.
--- findimagedupes.old 2014-08-18 13:06:51.113118039 +1100
+++ findimagedupes 2014-08-18 13:07:12.641117869 +1100
@@ -480,7 +480,7 @@
$#$image = 0;
}
try $image->Sample("160x160!");
- try $image->Modulate(saturation=>-100);
+ try $image->Quantize(colorspace => 'gray');
try $image->Blur(radius=>3,sigma=>99);
try $image->Normalize();
try $image->Equalize();
--
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