for(int x=0; x<cornernessMap.length; x++){
for(int y=0; y<cornernessMap[0].length; y++){
// Is it a corner?
if(cornernessMap[x][y] > 0){
rsize = Math.min(Math.min(Math.min(x, rectSize), Math.min(cornernessMap.length-x, rectSize)), Math.min(Math.min(y, rectSize), Math.min(cornernessMap[0].length-y, rectSize)));
ret.fillRect(x, y, rsize, rsize, Color.red);
}
}
}
return ret;