func PaintFaces(img []byte, faces faces) []byte {
image := opencv.DecodeImageMem(img)
for _, face := range faces {
opencv.Rectangle(image,
opencv.Point{face.coord.x + face.coord.width, face.coord.y},
opencv.Point{face.coord.x, face.coord.y + face.coord.height},
opencv.ScalarAll(0), 1, 1, 0)
le := face.LeftEye().Center()
re := face.RightEye().Center()
opencv.Circle(image,
opencv.Point{le.X(), le.Y()},
2,
opencv.ScalarAll(255), 1, 1, 0)
opencv.Circle(image,
opencv.Point{re.x, re.y},
2,
opencv.ScalarAll(255), 1, 1, 0)
faceCenter := face.Center()
opencv.Circle(image,
opencv.Point{faceCenter.x, faceCenter.y},
2,
opencv.ScalarAll(50), 1, 1, 0)
// opencv.Rectangle(image,
// opencv.Point{face.mouth.x + face.mouth.width, face.mouth.y},
// opencv.Point{face.mouth.x, face.mouth.y + face.mouth.height},
// opencv.ScalarAll(2), 1, 1, 0)
}
buf := new(bytes.Buffer)
err := jpeg.Encode(buf, image.ToImage(), nil)
if err != nil {
panic(err)
}
return buf.Bytes()
}
func PaintFace(img []byte, face face) []byte {
image := opencv.DecodeImageMem(img)
opencv.Rectangle(image,
opencv.Point{face.coord.x + face.coord.width, face.coord.y},
opencv.Point{face.coord.x, face.coord.y + face.coord.height},
opencv.ScalarAll(0), 1, 1, 0)
le := face.eye_left.Center()
re := face.eye_right.Center()
opencv.Circle(image,
opencv.Point{le.x, le.y},
2,
opencv.ScalarAll(255), 1, 1, 0)
opencv.Circle(image,
opencv.Point{re.x, re.y},
2,
opencv.ScalarAll(255), 1, 1, 0)
faceCenter := face.Center()
opencv.Circle(image,
opencv.Point{faceCenter.x, faceCenter.y},
2,
opencv.ScalarAll(50), 1, 1, 0)
opencv.Rectangle(image,
opencv.Point{face.mouth.x + face.mouth.width, face.mouth.y},
opencv.Point{face.mouth.x, face.mouth.y + face.mouth.height},
opencv.ScalarAll(2), 1, 1, 0)
buf := new(bytes.Buffer)
err := jpeg.Encode(buf, image.ToImage(), nil)
if err != nil {
panic(err)
}
return buf.Bytes()
}
func Crosshair(img []byte) []byte {
image := opencv.DecodeImageMem(img)
//Horizontal line
opencv.Line(image,
opencv.Point{0, image.Height() / 2},
opencv.Point{image.Width(), image.Height() / 2},
opencv.ScalarAll(0), 1, 1, 0)
//vertical line
opencv.Line(image,
opencv.Point{image.Width() / 2, 0},
opencv.Point{image.Width() / 2, image.Height()},
opencv.ScalarAll(0), 1, 1, 0)
buf := new(bytes.Buffer)
err := jpeg.Encode(buf, image.ToImage(), nil)
if err != nil {
panic(err)
}
return buf.Bytes()
}
func main() {
_, currentfile, _, _ := runtime.Caller(0)
image := opencv.LoadImage(path.Join(path.Dir(currentfile), "../images/lena.jpg"))
cascade := opencv.LoadHaarClassifierCascade(path.Join(path.Dir(currentfile), "haarcascade_frontalface_alt.xml"))
faces := cascade.DetectObjects(image)
for _, value := range faces {
opencv.Rectangle(image,
opencv.Point{value.X() + value.Width(), value.Y()},
opencv.Point{value.X(), value.Y() + value.Height()},
opencv.ScalarAll(255.0), 1, 1, 0)
}
win := opencv.NewWindow("Face Detection")
win.ShowImage(image)
opencv.WaitKey(0)
}
func main() {
win := opencv.NewWindow("Go-OpenCV Webcam Face Detection")
defer win.Destroy()
cap := opencv.NewCameraCapture(0)
if cap == nil {
panic("cannot open camera")
}
defer cap.Release()
cwd, err := os.Getwd()
if err != nil {
panic(err)
}
cascade := opencv.LoadHaarClassifierCascade(path.Join(cwd, "haarcascade_frontalface_alt.xml"))
fmt.Println("Press ESC to quit")
for {
if cap.GrabFrame() {
img := cap.RetrieveFrame(1)
if img != nil {
faces := cascade.DetectObjects(img)
for _, value := range faces {
opencv.Circle(img,
opencv.Point{
value.X() + (value.Width() / 2),
value.Y() + (value.Height() / 2),
},
value.Width()/2,
opencv.ScalarAll(255.0), 1, 1, 0)
}
win.ShowImage(img)
} else {
fmt.Println("nil image")
}
}
key := opencv.WaitKey(1)
if key == 27 {
os.Exit(0)
}
}
}
func (e eyeMarker) drawEyeMarker(img *opencv.IplImage, p opencv.Point) {
opencv.Circle(img, p, 5, opencv.ScalarAll(175.0), 1, 1, 0)
}
func main() {
filename := "../images/fruits.jpg"
if len(os.Args) == 2 {
filename = os.Args[1]
}
img0 := opencv.LoadImage(filename)
if img0 == nil {
panic("LoadImage fail")
}
defer img0.Release()
fmt.Print("Hot keys: \n",
"\tESC - quit the program\n",
"\tr - restore the original image\n",
"\ti or ENTER - run inpainting algorithm\n",
"\t\t(before running it, paint something on the image)\n",
)
img := img0.Clone()
inpainted := img0.Clone()
inpaint_mask := opencv.CreateImage(img0.Width(), img0.Height(), 8, 1)
opencv.Zero(inpaint_mask)
//opencv.Zero( inpainted )
win := opencv.NewWindow("image")
defer win.Destroy()
prev_pt := opencv.Point{-1, -1}
win.SetMouseCallback(func(event, x, y, flags int, param ...interface{}) {
if img == nil {
os.Exit(0)
}
if event == opencv.CV_EVENT_LBUTTONUP ||
(flags&opencv.CV_EVENT_FLAG_LBUTTON) == 0 {
prev_pt = opencv.Point{-1, -1}
} else if event == opencv.CV_EVENT_LBUTTONDOWN {
prev_pt = opencv.Point{x, y}
} else if event == opencv.CV_EVENT_MOUSEMOVE &&
(flags&opencv.CV_EVENT_FLAG_LBUTTON) != 0 {
pt := opencv.Point{x, y}
if prev_pt.X < 0 {
prev_pt = pt
}
rgb := opencv.ScalarAll(255.0)
opencv.Line(inpaint_mask, prev_pt, pt, rgb, 5, 8, 0)
opencv.Line(img, prev_pt, pt, rgb, 5, 8, 0)
prev_pt = pt
win.ShowImage(img)
}
})
win.ShowImage(img)
opencv.WaitKey(0)
win2 := opencv.NewWindow("inpainted image")
defer win2.Destroy()
win2.ShowImage(inpainted)
for {
key := opencv.WaitKey(20)
if key == 27 {
os.Exit(0)
} else if key == 'r' {
opencv.Zero(inpaint_mask)
opencv.Copy(img0, img, nil)
win.ShowImage(img)
} else if key == 'i' || key == '\n' {
opencv.Inpaint(img, inpaint_mask, inpainted, 3,
opencv.CV_INPAINT_TELEA,
)
win2.ShowImage(inpainted)
}
}
os.Exit(0)
}