//------------------均值濾波器
bool FilterAV(unsigned char *image,int height,int width)
{
int i,j;
unsigned char *p=(unsigned char*)malloc(height*width);
for(i=1;i<height-1;i++)
{
for(j=1;j<width-1;j++)
{
p[i*width+j]=(unsigned char)(((int)image[(i-1)*width+j-1]
+(int)image[(i-1)*width+j]
+(int)image[(i-1)*width+j+1]
+(int)image[i*width+j-1]
+(int)image[i*width+j]
+(int)image[i*width+j+1]
+(int)image[(i+1)*width+j-1]
+(int)image[(i+1)*width+j]
+(int)image[(i+1)*width+j+1])/9);
}
}
for(i=1;i<height-1;i++)
{
for(j=1;j<width-1;j++)
{
image[i*width+j]=p[i*width+j];
}
}
free(p);
return true;
}
//----------------------------中值濾波器
bool FilterMid(unsigned char *image,int height,int width)
{
int i,j,k,l;
int pos;
unsigned char temp;
unsigned char psr[9];
unsigned char *p=(unsigned char*)malloc(height*width);
for(i=1;i<height-1;i++)
{
for(j=1;j<width-1;j++)
{ //---3*3窗口矩陣
psr[0]=image[(i-1)*width+j-1];
psr[1]=image[(i-1)*width+j];
psr[2]=image[(i-1)*width+j+1];
psr[3]=image[i*width+j-1];
psr[4]=image[i*width+j];
psr[5]=image[i*width+j+1];
psr[6]=image[(i+1)*width+j-1];
psr[7]=image[(i+1)*width+j];
psr[8]=image[(i+1)*width+j+1];
//--------選擇排序
for(k=0;k<9;k++)
{
pos=k;
for(l=k;l<9;l++)
{
if(psr[l]<psr[pos])
pos=l;
}
temp=psr[k];
psr[k]=psr[pos];
psr[pos]=temp;
}
//------取中值
p[i*width+j]=psr[4];
}
}
for(i=1;i<height-1;i++)
{
for(j=1;j<width-1;j++)
{
image[i*width+j]=p[i*width+j];
}
}
free(p);
return true;
}