forked from openkylin/kolourpaint
62 lines
2.2 KiB
C
62 lines
2.2 KiB
C
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/*
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Copyright (c) 2003-2007 Clarence Dang <dang@kde.org>
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Copyright (c) 2006 Mike Gashler <gashlerm@yahoo.com>
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef kpEffectToneEnhance_H
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#define kpEffectToneEnhance_H
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#include "imagelib/kpImage.h"
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//
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// Histogram Equalizer effect.
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//
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// It just divides out the color histogram from the pixel values. (So if
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// you plot the color histogram after equalizing, you should get a nearly
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// flat/uniform distribution.)
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//
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// The two sliders adjust:
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//
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// 1. The extent to which it equalizes
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// 2. The local-ness of the equalization. (In other words, it computes just
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// the histogram of the regions near the pixel it is adjusting.)
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//
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// ASSUMPTION: The given <image> is not paletted (currently, this is the
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// same as the screen mode not being paletted).
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//
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class kpEffectToneEnhance
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{
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public:
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static kpImage applyEffect (const kpImage &image,
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double granularity, double amount);
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};
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#endif // kpEffectToneEnhance_H
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