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/** \file
* \brief Morphology Operations for Gray Images
*
* See Copyright Notice in im_lib.h
* $Id: im_morphology_gray.cpp,v 1.1 2008/10/17 06:16:33 scuri Exp $
*/
#include <im.h>
#include <im_util.h>
#include <im_counter.h>
#include <im_convert.h>
#include "im_process_loc.h"
#include "im_process_pon.h"
#include <stdlib.h>
#include <stdio.h>
#include <memory.h>
#include <string.h>
#include <math.h>
template <class T, class DT>
static int DoGrayMorphConvolve(T *map, T* new_map, int width, int height, const imImage* kernel, int counter, int ismax, DT)
{
DT value, *kernel_line, max = 0, min = 0;
int offset, new_offset, i, j, x, y, init;
int kh, kw, kh2, kw2;
kh = kernel->height;
kw = kernel->width;
kh2 = kernel->height/2;
kw2 = kernel->width/2;
DT* kernel_data = (DT*)kernel->data[0];
for(j = 0; j < height; j++)
{
new_offset = j * width;
for(i = 0; i < width; i++)
{
init = 0;
for(y = -kh2; y <= kh2; y++)
{
kernel_line = kernel_data + (y+kh2)*kw;
if ((j + y < 0) || // pass the bottom border
(j + y >= height)) // pass the top border
continue;
else
offset = (j + y) * width;
for(x = -kw2; x <= kw2; x++)
{
if (kernel_line[x+kw2] != -1)
{
if ((i + x < 0) || // pass the left border
(i + x >= width)) // pass the right border
continue;
else
value = kernel_line[x+kw2] + map[offset + (i + x)];
if (init == 0) // first time here for each pass
{
if (ismax)
max = value;
else
min = value;
init = 1;
}
else
{
if (ismax && value > max)
max = value;
if (!ismax && value < min)
min = value;
}
}
}
}
int size_of = sizeof(imbyte);
if (sizeof(T) == size_of)
{
if (ismax)
new_map[new_offset + i] = (T)IM_BYTECROP(max);
else
new_map[new_offset + i] = (T)IM_BYTECROP(min);
}
else
{
if (ismax)
new_map[new_offset + i] = (T)max;
else
new_map[new_offset + i] = (T)min;
}
}
if (!imCounterInc(counter))
return 0;
}
return 1;
}
int imProcessGrayMorphConvolve(const imImage* src_image, imImage* dst_image, const imImage *kernel, int ismax)
{
int ret = 0;
int counter = imCounterBegin("Gray Morphological Convolution");
const char* msg = (const char*)imImageGetAttribute(kernel, "Description", NULL, NULL);
if (!msg) msg = "Processing...";
imCounterTotal(counter, src_image->depth*src_image->height, msg);
imImage* fkernel = NULL;
if (src_image->data_type == IM_FLOAT && kernel->data_type != IM_FLOAT)
{
fkernel = imImageCreate(kernel->width, kernel->height, IM_GRAY, IM_FLOAT);
imConvertDataType(kernel, fkernel, 0, 0, 0, IM_CAST_DIRECT);
kernel = fkernel;
}
for (int i = 0; i < src_image->depth; i++)
{
switch(src_image->data_type)
{
case IM_BYTE:
ret = DoGrayMorphConvolve((imbyte*)src_image->data[i], (imbyte*)dst_image->data[i], src_image->width, src_image->height, kernel, counter, ismax, (int)0);
break;
case IM_USHORT:
ret = DoGrayMorphConvolve((imushort*)src_image->data[i], (imushort*)dst_image->data[i], src_image->width, src_image->height, kernel, counter, ismax, (int)0);
break;
case IM_INT:
ret = DoGrayMorphConvolve((int*)src_image->data[i], (int*)dst_image->data[i], src_image->width, src_image->height, kernel, counter, ismax, (int)0);
break;
case IM_FLOAT:
ret = DoGrayMorphConvolve((float*)src_image->data[i], (float*)dst_image->data[i], src_image->width, src_image->height, kernel, counter, ismax, (float)0);
break;
}
if (!ret)
break;
}
if (fkernel) imImageDestroy(fkernel);
imCounterEnd(counter);
return ret;
}
int imProcessGrayMorphErode(const imImage* src_image, imImage* dst_image, int kernel_size)
{
imImage* kernel = imImageCreate(kernel_size, kernel_size, IM_GRAY, IM_INT);
imImageSetAttribute(kernel, "Description", IM_BYTE, -1, (void*)"Erode");
// Kernel is all zeros
int ret = imProcessGrayMorphConvolve(src_image, dst_image, kernel, 0);
imImageDestroy(kernel);
return ret;
}
int imProcessGrayMorphDilate(const imImage* src_image, imImage* dst_image, int kernel_size)
{
imImage* kernel = imImageCreate(kernel_size, kernel_size, IM_GRAY, IM_INT);
imImageSetAttribute(kernel, "Description", IM_BYTE, -1, (void*)"Dilate");
// Kernel is all zeros
int ret = imProcessGrayMorphConvolve(src_image, dst_image, kernel, 1);
imImageDestroy(kernel);
return ret;
}
int imProcessGrayMorphOpen(const imImage* src_image, imImage* dst_image, int kernel_size)
{
imImage*temp = imImageClone(src_image);
if (!temp)
return 0;
if (!imProcessGrayMorphErode(src_image, temp, kernel_size)) {imImageDestroy(temp); return 0;}
if (!imProcessGrayMorphDilate(temp, dst_image, kernel_size)) {imImageDestroy(temp); return 0;}
imImageDestroy(temp);
return 1;
}
int imProcessGrayMorphClose(const imImage* src_image, imImage* dst_image, int kernel_size)
{
imImage*temp = imImageClone(src_image);
if (!temp)
return 0;
if (!imProcessGrayMorphDilate(src_image, temp, kernel_size)) {imImageDestroy(temp); return 0;}
if (!imProcessGrayMorphErode(temp, dst_image, kernel_size)) {imImageDestroy(temp); return 0;}
imImageDestroy(temp);
return 1;
}
int imProcessGrayMorphTopHat(const imImage* src_image, imImage* dst_image, int kernel_size)
{
if (!imProcessGrayMorphOpen(src_image, dst_image, kernel_size)) return 0;
imProcessArithmeticOp(src_image, dst_image, dst_image, IM_BIN_DIFF);
return 1;
}
int imProcessGrayMorphWell(const imImage* src_image, imImage* dst_image, int kernel_size)
{
if (!imProcessGrayMorphClose(src_image, dst_image, kernel_size)) return 0;
imProcessArithmeticOp(src_image, dst_image, dst_image, IM_BIN_DIFF);
return 1;
}
int imProcessGrayMorphGradient(const imImage* src_image, imImage* dst_image, int kernel_size)
{
imImage*temp = imImageClone(src_image);
if (!temp)
return 0;
if (!imProcessGrayMorphDilate(src_image, temp, kernel_size)) {imImageDestroy(temp); return 0;}
if (!imProcessGrayMorphErode(src_image, dst_image, kernel_size)) {imImageDestroy(temp); return 0;}
imProcessArithmeticOp(temp, dst_image, dst_image, IM_BIN_DIFF);
imImageDestroy(temp);
return 1;
}
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