70 lines
1.4 KiB
Go
70 lines
1.4 KiB
Go
package main
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import (
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"fmt"
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"os"
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//"path"
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//"runtime"
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"github.com/lazywei/go-opencv/opencv"
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//"../opencv" // can be used in forks, comment in real application
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)
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func main() {
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win := opencv.NewWindow("Go-OpenCV Webcam")
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defer win.Destroy()
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cap := opencv.NewCameraCapture(0)
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if cap == nil {
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panic("can not open camera")
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}
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defer cap.Release()
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win.CreateTrackbar("Thresh", 1, 100, func(pos int, param ...interface{}) {
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for {
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if cap.GrabFrame() {
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img := cap.RetrieveFrame(1)
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if img != nil {
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ProcessImage(img, win, pos)
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} else {
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fmt.Println("Image ins nil")
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}
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}
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if key := opencv.WaitKey(10); key == 27 {
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os.Exit(0)
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}
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}
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})
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opencv.WaitKey(0)
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}
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func ProcessImage(img *opencv.IplImage, win *opencv.Window, pos int) error {
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w := img.Width()
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h := img.Height()
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// Create the output image
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cedge := opencv.CreateImage(w, h, opencv.IPL_DEPTH_8U, 3)
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defer cedge.Release()
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// Convert to grayscale
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gray := opencv.CreateImage(w, h, opencv.IPL_DEPTH_8U, 1)
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edge := opencv.CreateImage(w, h, opencv.IPL_DEPTH_8U, 1)
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defer gray.Release()
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defer edge.Release()
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opencv.CvtColor(img, gray, opencv.CV_BGR2GRAY)
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opencv.Smooth(gray, edge, opencv.CV_BLUR, 3, 3, 0, 0)
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opencv.Not(gray, edge)
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// Run the edge detector on grayscale
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opencv.Canny(gray, edge, float64(pos), float64(pos*3), 3)
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opencv.Zero(cedge)
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// copy edge points
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opencv.Copy(img, cedge, edge)
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win.ShowImage(cedge)
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return nil
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}
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