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/** \file
* \brief Color Processing Operations
*
* See Copyright Notice in im_lib.h
* $Id: im_color.cpp,v 1.2 2010/01/06 20:16:30 scuri Exp $
*/
#include <im.h>
#include <im_util.h>
#include <im_colorhsi.h>
#include <im_palette.h>
#include "im_process_pon.h"
#include <stdlib.h>
#include <memory.h>
static void rgb2yrgb(imbyte* r, imbyte* g, imbyte* b, imbyte* y)
{
int ri,gi,bi;
*y = (imbyte)((299*(*r) + 587*(*g) + 114*(*b)) / 1000);
ri = (*r) - (*y) + 128;
gi = (*g) - (*y) + 128;
bi = (*b) - (*y) + 128;
if (ri < 0) ri = 0;
if (gi < 0) gi = 0;
if (bi < 0) bi = 0;
*r = (imbyte)ri;
*g = (imbyte)gi;
*b = (imbyte)bi;
}
void imProcessSplitYChroma(const imImage* src_image, imImage* y_image, imImage* chroma_image)
{
imbyte Y,
*red=(imbyte*)src_image->data[0],
*green=(imbyte*)src_image->data[1],
*blue=(imbyte*)src_image->data[2],
*red2=(imbyte*)chroma_image->data[0],
*green2=(imbyte*)chroma_image->data[1],
*blue2=(imbyte*)chroma_image->data[2],
*map1=(imbyte*)y_image->data[0];
for (int i = 0; i < src_image->count; i++)
{
imbyte R = red[i];
imbyte G = green[i];
imbyte B = blue[i];
rgb2yrgb(&R, &G, &B, &Y);
map1[i] = Y;
red2[i] = R;
green2[i] = G;
blue2[i] = B;
}
}
static void DoSplitHSIFloat(float** data, float* hue, float* saturation, float* intensity, int count)
{
float *red=data[0],
*green=data[1],
*blue=data[2];
for (int i = 0; i < count; i++)
{
imColorRGB2HSI(red[i], green[i], blue[i], &hue[i], &saturation[i], &intensity[i]);
}
}
static void DoSplitHSIByte(imbyte** data, float* hue, float* saturation, float* intensity, int count)
{
imbyte *red=data[0],
*green=data[1],
*blue=data[2];
for (int i = 0; i < count; i++)
{
imColorRGB2HSIbyte(red[i], green[i], blue[i], &hue[i], &saturation[i], &intensity[i]);
}
}
void imProcessSplitHSI(const imImage* image, imImage* image1, imImage* image2, imImage* image3)
{
switch(image->data_type)
{
case IM_BYTE:
DoSplitHSIByte((imbyte**)image->data, (float*)image1->data[0], (float*)image2->data[0], (float*)image3->data[0], image->count);
break;
case IM_FLOAT:
DoSplitHSIFloat((float**)image->data, (float*)image1->data[0], (float*)image2->data[0], (float*)image3->data[0], image->count);
break;
}
imImageSetPalette(image1, imPaletteHues(), 256);
}
static void DoMergeHSIFloat(float** data, float* hue, float* saturation, float* intensity, int count)
{
float *red=data[0],
*green=data[1],
*blue=data[2];
for (int i = 0; i < count; i++)
{
imColorHSI2RGB(hue[i], saturation[i], intensity[i], &red[i], &green[i], &blue[i]);
}
}
static void DoMergeHSIByte(imbyte** data, float* hue, float* saturation, float* intensity, int count)
{
imbyte *red=data[0],
*green=data[1],
*blue=data[2];
for (int i = 0; i < count; i++)
{
imColorHSI2RGBbyte(hue[i], saturation[i], intensity[i], &red[i], &green[i], &blue[i]);
}
}
void imProcessMergeHSI(const imImage* image1, const imImage* image2, const imImage* image3, imImage* image)
{
switch(image->data_type)
{
case IM_BYTE:
DoMergeHSIByte((imbyte**)image->data, (float*)image1->data[0], (float*)image2->data[0], (float*)image3->data[0], image->count);
break;
case IM_FLOAT:
DoMergeHSIFloat((float**)image->data, (float*)image1->data[0], (float*)image2->data[0], (float*)image3->data[0], image->count);
break;
}
}
void imProcessSplitComponents(const imImage* src_image, imImage** dst_image)
{
memcpy(dst_image[0]->data[0], src_image->data[0], src_image->plane_size);
memcpy(dst_image[1]->data[0], src_image->data[1], src_image->plane_size);
memcpy(dst_image[2]->data[0], src_image->data[2], src_image->plane_size);
if (imColorModeDepth(src_image->color_space) == 4 || src_image->has_alpha)
memcpy(dst_image[3]->data[0], src_image->data[3], src_image->plane_size);
}
void imProcessMergeComponents(const imImage** src_image, imImage* dst_image)
{
memcpy(dst_image->data[0], src_image[0]->data[0], dst_image->plane_size);
memcpy(dst_image->data[1], src_image[1]->data[0], dst_image->plane_size);
memcpy(dst_image->data[2], src_image[2]->data[0], dst_image->plane_size);
if (imColorModeDepth(dst_image->color_space) == 4 || dst_image->has_alpha)
memcpy(dst_image->data[3], src_image[3]->data[0], dst_image->plane_size);
}
template <class T>
static void DoNormalizeComp(T** src_data, float** dst_data, int count, int depth)
{
int d;
T* src_pdata[4];
float* dst_pdata[4];
for(d = 0; d < depth; d++)
{
dst_pdata[d] = dst_data[d];
src_pdata[d] = src_data[d];
}
for (int i = 0; i < count; i++)
{
float sum = 0;
for(d = 0; d < depth; d++)
sum += (float)*(src_pdata[d]);
for(d = 0; d < depth; d++)
{
if (sum == 0)
*(dst_pdata[d]) = 0;
else
*(dst_pdata[d]) = (float)*(src_pdata[d]) / sum;
dst_pdata[d]++;
src_pdata[d]++;
}
}
}
void imProcessNormalizeComponents(const imImage* src_image, imImage* dst_image)
{
switch(src_image->data_type)
{
case IM_BYTE:
DoNormalizeComp((imbyte**)src_image->data, (float**)dst_image->data, src_image->count, src_image->depth);
break;
case IM_USHORT:
DoNormalizeComp((imushort**)src_image->data, (float**)dst_image->data, src_image->count, src_image->depth);
break;
case IM_INT:
DoNormalizeComp((int**)src_image->data, (float**)dst_image->data, src_image->count, src_image->depth);
break;
case IM_FLOAT:
DoNormalizeComp((float**)src_image->data, (float**)dst_image->data, src_image->count, src_image->depth);
break;
}
}
template <class T>
static void DoReplaceColor(T *src_data, T *dst_data, int width, int height, int depth, float* src_color, float* dst_color)
{
int d, count = width*height;
for (int i = 0; i < count; i++)
{
int equal = 1;
for (d = 0; d < depth; d++)
{
if (*(src_data+d*count) != (T)src_color[d])
{
equal = 0;
break;
}
}
for (d = 0; d < depth; d++)
{
if (equal)
*(dst_data+d*count) = (T)dst_color[d];
else
*(dst_data+d*count) = *(src_data+d*count);
}
src_data++;
dst_data++;
}
}
void imProcessReplaceColor(const imImage* src_image, imImage* dst_image, float* src_color, float* dst_color)
{
switch(src_image->data_type)
{
case IM_BYTE:
DoReplaceColor((imbyte*)src_image->data[0], (imbyte*)dst_image->data[0], src_image->width, src_image->height, src_image->depth, src_color, dst_color);
break;
case IM_USHORT:
DoReplaceColor((imushort*)src_image->data[0], (imushort*)dst_image->data[0], src_image->width, src_image->height, src_image->depth, src_color, dst_color);
break;
case IM_INT:
DoReplaceColor((int*)src_image->data[0], (int*)dst_image->data[0], src_image->width, src_image->height, src_image->depth, src_color, dst_color);
break;
case IM_FLOAT:
DoReplaceColor((float*)src_image->data[0], (float*)dst_image->data[0], src_image->width, src_image->height, src_image->depth, src_color, dst_color);
break;
}
}
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