func ProcessRoi(img *opencv.IplImage, gradeOfCanny int) *opencv.IplImage {
var roi = img.GetROI()
w := roi.Width()
h := roi.Height()
// Create the output image
cedge := opencv.CreateImage(w, h, opencv.IPL_DEPTH_8U, 3)
//defer cedge.Release()
// Convert to grayscale
gray := opencv.CreateImage(w, h, opencv.IPL_DEPTH_8U, 1)
edge := opencv.CreateImage(w, h, opencv.IPL_DEPTH_8U, 1)
//newimage := opencv.CreateImage(w, h, opencv.IPL_DEPTH_8U, 1)
defer gray.Release()
defer edge.Release()
opencv.CvtColor(img, gray, opencv.CV_BGR2GRAY)
opencv.Smooth(gray, edge, opencv.CV_BLUR, 3, 3, 0, 0)
opencv.Not(gray, edge)
// Run the edge detector on grayscale
opencv.Canny(gray, edge, float64(gradeOfCanny), float64(gradeOfCanny*3), 3)
opencv.Zero(cedge)
// copy edge points
opencv.Copy(img, cedge, edge)
return cedge
}
