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| package demo
|
| import (
| "fmt"
| "image"
| "image/color"
|
| "gocv.io/x/gocv"
| )
|
| func cvRTSP() {
| url := `rtsp://admin:a1234567@192.168.1.188:554/h264/ch1/main/av_stream`
|
| webcam, _ := gocv.OpenVideoCapture(url)
| window := gocv.NewWindow("Hello")
| img := gocv.NewMat()
|
| for {
| webcam.Read(&img)
| window.IMShow(img)
| window.WaitKey(1)
| }
| }
|
| func cvFaceDetect() {
| // set to use a video capture device 0
| deviceID := 0
| url := `rtsp://admin:a1234567@192.168.1.188:554/h264/ch1/main/av_stream`
|
| // open webcam
| webcam, err := gocv.OpenVideoCapture(url)
| if err != nil {
| fmt.Println(err)
| return
| }
| defer webcam.Close()
|
| // open display window
| window := gocv.NewWindow("Face Detect")
| defer window.Close()
|
| // prepare image matrix
| img := gocv.NewMat()
| defer img.Close()
|
| // color for the rect when faces detected
| blue := color.RGBA{0, 0, 255, 0}
|
| // load classifier to recognize faces
| classifier := gocv.NewCascadeClassifier()
| defer classifier.Close()
|
| if !classifier.Load("data/haarcascade_frontalface_default.xml") {
| fmt.Println("Error reading cascade file: data/haarcascade_frontalface_default.xml")
| return
| }
|
| fmt.Printf("start reading camera device: %v\n", deviceID)
| for {
| if ok := webcam.Read(&img); !ok {
| fmt.Printf("cannot read device %v\n", deviceID)
| return
| }
| if img.Empty() {
| continue
| }
|
| // detect faces
| rects := classifier.DetectMultiScale(img)
| fmt.Printf("found %d faces\n", len(rects))
|
| // draw a rectangle around each face on the original image
| for _, r := range rects {
| gocv.Rectangle(&img, r, blue, 3)
| }
|
| // show the image in the window, and wait 1 millisecond
| window.IMShow(img)
| window.WaitKey(1)
| }
| }
|
| var w = 400
|
| // CVDraw demo
| func CVDraw() {
| windowA := gocv.NewWindow("basic drawing: atom")
| windowR := gocv.NewWindow("basic drawing: rook")
| defer windowA.Close()
| defer windowR.Close()
|
| atom := gocv.NewMatWithSize(w, w, gocv.MatTypeCV8UC3)
| defer atom.Close()
|
| rook := gocv.NewMatWithSize(w, w, gocv.MatTypeCV8UC3)
| defer rook.Close()
|
| black := color.RGBA{0, 0, 0, 0}
| blue := color.RGBA{0, 0, 255, 0}
| red := color.RGBA{255, 0, 0, 0}
| white := color.RGBA{255, 255, 255, 0}
| yellow := color.RGBA{255, 255, 0, 0}
|
| // draw the atom
| gocv.Ellipse(&atom, image.Pt(w/2., w/2.), image.Pt(w/4.0, w/16.0), 90., 0, 360, blue, 2)
| gocv.Ellipse(&atom, image.Pt(w/2., w/2.), image.Pt(w/4.0, w/16.0), 0., 0, 360, blue, 2)
| gocv.Ellipse(&atom, image.Pt(w/2., w/2.), image.Pt(w/4.0, w/16.0), 45., 0, 360, blue, 2)
| gocv.Ellipse(&atom, image.Pt(w/2., w/2.), image.Pt(w/4.0, w/16.0), -45., 0, 360, blue, 2)
| gocv.Circle(&atom, image.Pt(w/2., w/2.), w/32., red, -1)
|
| // draw the rook
| points := [][]image.Point{
| {
| image.Pt(w/4., 7*w/8.),
| image.Pt(3*w/4., 7*w/8.),
| image.Pt(3*w/4., 13*w/16.),
| image.Pt(11*w/16., 13*w/16.),
| image.Pt(19*w/32., 3*w/8.),
| image.Pt(3*w/4., 3*w/8.),
| image.Pt(3*w/4., w/8.),
| image.Pt(26*w/40., w/8.),
| image.Pt(26*w/40., w/4.),
| image.Pt(22*w/40., w/4.),
| image.Pt(22*w/40., w/8.),
| image.Pt(18*w/40., w/8.),
| image.Pt(18*w/40., w/4.),
| image.Pt(14*w/40., w/4.),
| image.Pt(14*w/40., w/8.),
| image.Pt(w/4., w/8.),
| image.Pt(w/4., 3*w/8.),
| image.Pt(13*w/32., 3*w/8.),
| image.Pt(5*w/16., 13*w/16.),
| image.Pt(w/4., 13*w/16.),
| },
| }
| gocv.FillPoly(&rook, points, white)
| gocv.Rectangle(&rook, image.Rect(0, 7*w/8.0, w, w), yellow, -1)
| gocv.Line(&rook, image.Pt(0, 15*w/16), image.Pt(w, 15*w/16), black, 2)
| gocv.Line(&rook, image.Pt(w/4, 7*w/8), image.Pt(w/4, w), black, 2)
| gocv.Line(&rook, image.Pt(w/2, 7*w/8), image.Pt(w/2, w), black, 2)
| gocv.Line(&rook, image.Pt(3*w/4, 7*w/8), image.Pt(3*w/4, w), black, 2)
|
| for {
| windowA.IMShow(atom)
| windowR.IMShow(rook)
|
| if windowA.WaitKey(10) >= 0 || windowR.WaitKey(10) >= 0 {
| break
| }
| }
| }
|
|
