gaussFilte.cpp
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#include "gaussFilte.h"
void gaussianFilter(unsigned char* data, int width, int height, int type)
{
if (type == 3)
{
int i, j, index, sum;
int templates[9] = {1, 2, 1,
2, 4, 2,
1, 2, 1}; //模板的值
unsigned char* tmpdata = new unsigned char[height * width];
for (i = 0; i < height * width; i++)
{
tmpdata[i] = data[i];
}
for(i = 1; i < height - 1; i++)
{
for(j = 1; j < width - 1; j++)
{
index = sum = 0;
for(int m = i - 1;m < i + 2; m++)
{
for(int n = j - 1; n < j + 2; n++)
{
sum += tmpdata[m * width + n] * templates[index++]; //处理
}
}
data[i * width + j] = sum >> 4;
}
}
delete[] tmpdata;
}
else
{
int i, j, index, sum;
int templates[25] = {1, 4, 7, 4, 1,
4, 16, 26, 16, 4,
7, 26, 41, 26, 7,
4, 16, 26, 16, 4,
1, 4, 7, 4, 1}; //模板的值
unsigned char* tmpdata = new unsigned char[height * width];
for (i = 0; i < height * width; i++)
{
tmpdata[i] = data[i];
}
for(i = 1; i < height - 1; i++)
{
for(j = 1; j < width - 1; j++)
{
index = sum = 0;
for(int m = i - 2;m < i + 3; m++)
{
for(int n = j - 2; n < j + 3; n++)
{
sum += tmpdata[m * width + n] * templates[index++]; //处理
}
}
data[i * width + j] = sum / 273;
}
}
delete[] tmpdata;
}
}