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Added White balance filter. 

Terminology of the desaturation filter has been changed to match the gimp's one.
This commit is contained in:
Paolo Cignoni 2008-07-17 21:46:48 +00:00
parent f5afb40d66
commit 4842e38c94
1 changed files with 46 additions and 7 deletions
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53
vcg/complex/trimesh/update/color.h
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@ -601,7 +601,7 @@ static int Desaturation(UpdateMeshType &m, int method, const bool ProcessSelecte
return counter;
}
enum DesaturationMethods {M_LIGHTNESS = 0, M_LUMINANCE = 1, M_MEAN = 2};
enum DesaturationMethods {M_LIGHTNESS = 0, M_LUMINOSITY = 1, M_AVERAGE = 2};
static Color4b ColorDesaturate(Color4b c, int method)
{
@ -610,24 +610,24 @@ static Color4b ColorDesaturate(Color4b c, int method)
int val = (int)ComputeLightness(c);
return Color4b( val, val, val, 255);
}
case M_MEAN:{
int val = (int)ComputeMeanLightness(c);
case M_AVERAGE:{
int val = (int)ComputeAvgLightness(c);
return Color4b( val, val, val, 255);
}
case M_LUMINANCE:{
int val = (int)ComputeLuminance(c);
case M_LUMINOSITY:{
int val = (int)ComputeLuminosity(c);
return Color4b( val, val, val, 255);
}
default: assert(0);
}
}
static float ComputeMeanLightness(Color4b c)
static float ComputeAvgLightness(Color4b c)
{
return float(c[0]+c[1]+c[2])/3.0f;
}
static float ComputeLuminance(Color4b c)
static float ComputeLuminosity(Color4b c)
{
return float(0.2126f*c[0]+0.7152f*c[1]+0.0722f*c[2]);
}
@ -693,6 +693,45 @@ static int ValueEqualize(int cdfValue, int cdfMin, int cdfMax)
{
return int(float((cdfValue - cdfMin)/float(cdfMax - cdfMin)) * 255.0f);
}
static int WhiteBalance(UpdateMeshType &m, const bool ProcessSelected=false)
{
int unbalancedWhite = 0;
int counter=0;
VertexIterator vi;
for(vi=m.vert.begin();vi!=m.vert.end();++vi) //scan all the vertex...
{
if(!(*vi).IsD()) //if it has not been deleted...
{
if(!ProcessSelected || (*vi).IsS()) //if this vertex has been selected, do transormation
{
unbalancedWhite = (int)math::Max(ComputeLightness((*vi).C()), float(unbalancedWhite));
}
}
}
for(vi=m.vert.begin();vi!=m.vert.end();++vi) //scan all the vertex...
{
if(!(*vi).IsD()) //if it has not been deleted...
{
if(!ProcessSelected || (*vi).IsS()) //if this vertex has been selected, do transormation
{
(*vi).C()=ColorWhiteBalance((*vi).C(),unbalancedWhite);
++counter;
}
}
}
return counter;
}
static Color4b ColorWhiteBalance(Color4b c, int unbalancedWhite)
{
return Color4b(
math::Clamp<int>((int)(c[0]*(255.0f/unbalancedWhite)), 0, 255),
math::Clamp<int>((int)(c[1]*(255.0f/unbalancedWhite)), 0, 255),
math::Clamp<int>((int)(c[2]*(255.0f/unbalancedWhite)), 0, 255),
255);
}
};