func ProcessImage(img *opencv.IplImage, win *opencv.Window, pos int) error { w := img.Width() h := img.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) 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(pos), float64(pos*3), 3) opencv.Zero(cedge) // copy edge points opencv.Copy(img, cedge, edge) win.ShowImage(cedge) return nil }
func main() { _, currentfile, _, _ := runtime.Caller(0) filename := path.Join(path.Dir(currentfile), "../images/lena.jpg") if len(os.Args) == 2 { filename = os.Args[1] } image := opencv.LoadImage(filename) if image == nil { panic("LoadImage fail") } defer image.Release() w := image.Width() h := image.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) defer gray.Release() defer edge.Release() opencv.CvtColor(image, gray, opencv.CV_BGR2GRAY) win := opencv.NewWindow("Edge") defer win.Destroy() win.SetMouseCallback(func(event, x, y, flags int, param ...interface{}) { fmt.Printf("event = %d, x = %d, y = %d, flags = %d\n", event, x, y, flags, ) }) win.CreateTrackbar("Thresh", 1, 100, func(pos int, param ...interface{}) { edge_thresh := pos 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(edge_thresh), float64(edge_thresh*3), 3) opencv.Zero(cedge) // copy edge points opencv.Copy(image, cedge, edge) win.ShowImage(cedge) fmt.Printf("pos = %d\n", pos) }) win.ShowImage(image) for { key := opencv.WaitKey(20) if key == 27 { os.Exit(0) } } os.Exit(0) }