Sepia hydra
From Adobe Labs
[edit]
Sepia source code
/*****************************************************************************
*
* Author: Joa Ebert
* http://blog.je2050.de
* Contact: j -at- je2050.de
*
*****************************************************************************/
kernel Sepia
< nameSpace: "popforge::ImageProcessing";
vendor: "Joa Ebert";
version: 1;
description: "A good looking sepia filter using Y transform";
>
{
void evaluatePixel(in image3 source, out pixel3 result)
{
pixel3 color = sampleLinear( source, outCoord() );
float y = 0.299 * color.r + 0.587 * color.g + 0.114 * color.b;
// use min/max instead of if's
float r = min(1.0, y + 0.19);
float g = max(0.0, y - 0.055);
float b = max(0.0, y - 0.22);
result = pixel3(r,g,b);
}
}
