//---------------------------------------------------------------------------------------------
//enclosure image
//---------------------------------------------------------------------------------------------
public void enclosure(classimage source_img, int search_radius, int threshold)
{
int x,y,tx,ty,bx,by,r;
int[] p = new int[4];
int c,value,pixels,minval;
source_img.updateIntegralImage();
r = search_radius;
for (x=0;x<width;x++)
{
for (y=0;y<height;y++)
{
tx = x-r;
ty = y-r;
bx = x+r;
by = y+r;
if (tx<0) tx=0;
if (bx>=width) bx=width-1;
if (ty<0) ty=0;
if (by>=height) by=height-1;
pixels = (bx-tx)*(by-ty);
minval = pixels*threshold/100;
value=0;
p[0] = (int)source_img.getIntegral(tx,ty,x,y,0);
if (p[0]>minval)
{
p[1] = (int)source_img.getIntegral(x,ty,bx,y,0);
if (p[1]>minval)
{
p[2] = (int)source_img.getIntegral(tx,y,x,by,0);
if (p[2]>minval)
{
p[3] = (int)source_img.getIntegral(x,y,bx,by,0);
if (p[3]>minval)
{
value = (Math.Abs(p[0]-p[1]) + Math.Abs(p[2]-p[3]) + Math.Abs(p[0]-p[3]) + Math.Abs(p[0]-p[2]))/(pixels/2);
value = value*value;
if (value>255) value=255;
value=255-value;
}
}
}
}
for (c=0;c<3;c++) image[x,y,c]=(Byte)value;
}
}
}
//---------------------------------------------------------------------------------------------
// Detect edges OFF
//---------------------------------------------------------------------------------------------
public void detectEdgesOff(classimage sourceimage, int minThresh, int patchSize)
{
int x,y,c;
int halfPatch = patchSize/2;
int quarterPatch = halfPatch/2;
int p1,p2,diff,pixels;
if (halfPatch<2) halfPatch=2;
if (quarterPatch<1) quarterPatch=1;
pixels = patchSize*patchSize;
sourceimage.updateIntegralImage();
for (y=halfPatch;y<height-halfPatch;y++)
{
for (x=halfPatch;x<width-halfPatch;x++)
{
p1 = (int)sourceimage.getIntegral(x-halfPatch,y-halfPatch,x+halfPatch,y+halfPatch,0);
p2 = (int)sourceimage.getIntegral(x-quarterPatch,y-quarterPatch,x+quarterPatch,y+quarterPatch,0);
diff = ((p2*2)-p1);
if (diff>0)
{
diff = Math.Abs(diff);
diff/=(pixels*10);
diff*=diff;
if (diff>255) diff=255;
}
else diff=0;
diff=255-diff;
if (diff<minThresh) diff=0;
for (c=0;c<3;c++) image[x,y,c] = (Byte)diff;
}
}
}
