/*?
?*?Wavelet?denoise?GIMP?plugin
?*?
?*?colorspace.c
?*?Copyright?2008?by?Marco?Rossini
?*?
?*?Implements?the?wavelet?denoise?code?of?UFRaw?by?Udi?Fuchs
?*?which?itself?bases?on?the?code?by?Dave?Coffin
?*?
?*?This?program?is?free?software;?you?can?redistribute?it?and/or?modify
?*?it?under?the?terms?of?the?GNU?General?Public?License?version?2
?*?as?published?by?the?Free?Software?Foundation.
?*?
?*/

#include?“plugin.h“

void
srgb2ycbcr?（float?**?fimg?int?size）
{
??/*?using?JPEG?conversion?here?-?expecting?all?channels?to?be
???*?in?[0:255]?range?*/
??int?i;
??float?y?cb?cr;

??for?（i?=?0;?i?????y?=???0.2990?*?fimg[0][i]?+?0.5870?*?fimg[1][i]?+?0.1140?*?fimg[2][i];
????cb?=?-0.1687?*?fimg[0][i]?-?0.3313?*?fimg[1][i]?+?0.5000?*?fimg[2][i]
?????????+?0.5;
????cr?=??0.5000?*?fimg[0][i]?-?0.4187?*?fimg[1][i]?-?0.0813?*?fimg[2][i]
?????????+?0.5;
????fimg[0][i]?=?y;
????fimg[1][i]?=?cb;
????fimg[2][i]?=?cr;
??}
}

void
ycbcr2srgb?（float?**fimg?int?size?int?pc）
{
??/*?using?JPEG?conversion?here?-?expecting?all?channels?to?be
???*?in?[0:255]?range?*/
??int?i;
??static?float?r?g?b;

??if?（pc?>?3）?{?/*?single?channel?colour?*/
????pc?-=?4;
????for?（i?=?0;?i???????fimg[（pc?+?1）?%?3][i]?=?0.5;
??????fimg[（pc?+?2）?%?3][i]?=?0.5;
????}
??}?else?if?（pc?>?0）?{?/*?single?channel?gray?*/
????pc?-=?1;
????for?（i?=?0;?i???????fimg[（pc?+?1）?%?3][i]?=?fimg[pc][i];
??????fimg[（pc?+?2）?%?3][i]?=?fimg[pc][i];
????}
????return;
??}

??for?（i?=?0;?i?????r?=?fimg[0][i]?+?1.40200?*?（fimg[2][i]?-?0.5）;
????g?=?fimg[0][i]?-?0.34414?*?（fimg[1][i]?-?0.5）
????????-?0.71414?*?（fimg[2][i]?-?0.5）;
????b?=?fimg[0][i]?+?1.77200?*?（fimg[1][i]?-?0.5）;
????fimg[0][i]?=?r;
????fimg[1][i]?=?g;
????fimg[2][i]?=?b;
??}
}

void
srgb2xyz?（float?**fimg?int?size）
{
??/*?fimg?in?[0:1]?sRGB?*/
??int?i;
??float?x?y?z;

??for?（i?=?0;?i?????/*?scaling?and?gamma?correction?（approximate）?*/
????fimg[0][i]?=?pow（fimg[0][i]?2.2）;
????fimg[1][i]?=?pow（fimg[1][i]?2.2）;
????fimg[2][i]?=?pow（fimg[2][i]?2.2）;
?

????/*?matrix?RGB?->?XYZ?with?D65?reference?white?（www.brucelindbloom.com）?*/
????x?=?0.412424?*?fimg[0][i]?+?0.357579?*?fimg[1][i]?+?0.180464?*?fimg[2][i];
????y?=?0.212656?*?fimg[0][i]?+?0.715158?*?fimg[1][i]?+?0.0721856?*?fimg[2][i];
????z?=?0.0193324?*?fimg[0][i]?+?0.119193?*?fimg[1][i]?+?0.950444?*?fimg[2][i];

????/*
????x?=?0.412424?*?fimg[0][i]?+?0.212656?*?fimg[1][i]?+?0.0193324?*?fimg[2][i];
????y?=?0.357579?*?fimg[0][i]?+?0.715158?*?fimg[1][i]?+?0.119193??*?fimg[2][i];
????z?=?0.180464?*?fimg[0][i]?+?0.0721856?*?fimg[1][i]?+?0.950444?*?fimg[2][i];
????*/

????fimg[0][i]?=?x;
????fimg[1][i]?=?y;
????fimg[2][i]?=?z;
??}
}

void
xyz2srgb?（float?**fimg?int?size?int?pc）
{
??int?i;
??float?r?g?b;

??if?（pc?>?3）?{?/*?single?channel?colour?*/
????pc?-=?4;
????for?（i?=?0;?i???????fimg[（pc?+?1）?%?3][i]?=?0.0;
??????fimg[（pc?+?2）?%?3][i]?=?0.0;
????}
??}?else?if?（pc?>?0）?{?/*?single?channel

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2013-05-06?12:11??wavelet-denoise-master\
?????文件?????????328??2013-05-06?12:11??wavelet-denoise-master\AUTHORS
?????文件???????17992??2013-05-06?12:11??wavelet-denoise-master\COPYING
?????文件????????2540??2013-05-06?12:11??wavelet-denoise-master\ChangeLog
?????文件?????????371??2013-05-06?12:11??wavelet-denoise-master\INSTALL
?????文件?????????481??2013-05-06?12:11??wavelet-denoise-master\Makefile
?????文件????????2153??2013-05-06?12:11??wavelet-denoise-master\README
?????文件?????????402??2013-05-06?12:11??wavelet-denoise-master\THANKS
?????文件?????????450??2013-05-06?12:11??wavelet-denoise-master\TRANSLATIONS
?????目錄???????????0??2013-05-06?12:11??wavelet-denoise-master\po\
?????文件????????1125??2013-05-06?12:11??wavelet-denoise-master\po\Makefile
?????文件????????6329??2013-05-06?12:11??wavelet-denoise-master\po\de.po
?????文件????????5884??2013-05-06?12:11??wavelet-denoise-master\po\et.po
?????文件????????6632??2013-05-06?12:11??wavelet-denoise-master\po\it.po
?????文件????????5839??2013-05-06?12:11??wavelet-denoise-master\po\pl.po
?????文件????????7708??2013-05-06?12:11??wavelet-denoise-master\po\ru.po
?????目錄???????????0??2013-05-06?12:11??wavelet-denoise-master\src\
?????文件?????????792??2013-05-06?12:11??wavelet-denoise-master\src\Makefile
?????文件????????7444??2013-05-06?12:11??wavelet-denoise-master\src\colorspace.c
?????文件????????6310??2013-05-06?12:11??wavelet-denoise-master\src\denoise.c
?????文件????????4942??2013-05-06?12:11??wavelet-denoise-master\src\events.c
?????文件???????16313??2013-05-06?12:11??wavelet-denoise-master\src\interface.c
?????文件????????1187??2013-05-06?12:11??wavelet-denoise-master\src\interface.h
?????文件????????2769??2013-05-06?12:11??wavelet-denoise-master\src\messages.h
?????文件????????3976??2013-05-06?12:11??wavelet-denoise-master\src\plugin.c
?????文件????????2844??2013-05-06?12:11??wavelet-denoise-master\src\plugin.h
?????文件????????4398??2013-05-06?12:11??wavelet-denoise-master\src\wavelet.c