Editing ycbcr2rgb - FilterMeisterWiki

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= ycbcr2rgb =
== Syntax ==
:{{int ycbcr2rgb(int y, int cb, int cr, int z)}}
== Arguments ==
:'''y'''
::Red value
:'''cb'''
::Green value
:'''cr'''
::Blue value
:'''z'''
::Determines which value is returned. z=0 for red, z=1 for green, z=2 for blue
== Return ==
:Returns the red, gree or blue value from 0 to 255 depending on the value of z
== Description ==
:Lets you convert YCbCr values to RGB values.
== Example ==
<code>
%ffp

ctl(0):"Y (Luminancy)",Range=(-255,255),val=0
ctl(1):"Cb (Chroma Blue)",Range=(-255,255),val=0
ctl(2):"Cr (Chroma Red)",Range=(-255,255),val=0

ForEveryTile:{

int r,g,b,i,cb,cr;

for (y = y_start; y &lt; y_end; y++) {

if (updateProgress(y,y_end)) abort();

for (x = x_start; x &lt; x_end; x++) {
				
      r = src(x,y,0);
      g = src(x,y,1);
      b = src(x,y,2);

i  = rgb2ycbcr(r,g,b,0);
      cb = rgb2ycbcr(r,g,b,1); 
      cr = rgb2ycbcr(r,g,b,2);

// Do the adjustment
      i = i + ctl(0);
      cb = cb + ctl(1);
      cr = cr + ctl(2);

pset( x, y, 0, ycbcr2rgb(i,cb,cr,0) );
      pset( x, y, 1, ycbcr2rgb(i,cb,cr,1) );
      pset( x, y, 2, ycbcr2rgb(i,cb,cr,2) );

}
  }

return true;
}
</code>
== Also see ==
:((rgb2ycbcr))

Summary of change:
Add document to category: