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personTracking.go
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/
personTracking.go
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package main
import (
"fmt"
"image"
"image/color"
"os"
"gocv.io/x/gocv"
)
type tracker struct {
people []int
detector *gocv.HOGDescriptor
input gocv.VideoCapture
//viewer *gocv.Window
img gocv.Mat
}
func newTracker() *tracker {
// define default hog descriptor
PersonDetector := gocv.NewHOGDescriptor()
defer PersonDetector.Close()
err := PersonDetector.SetSVMDetector(gocv.HOGDefaultPeopleDetector())
if err != nil {
fmt.Printf("error setting SVM Detector")
}
// // open webcam
//webcam, err := gocv.OpenVideoCapture(0)
// if err != nil {
// fmt.Printf("error opening video capture device")
// }
// defer webcam.Close()
// use file
file := os.Args[1]
video, err := gocv.VideoCaptureFile(file)
if err != nil {
fmt.Printf("error opening video file")
}
defer video.Close()
// open display window
//window := gocv.NewWindow("Person Detect")
//defer window.Close()
// prepare image matrix
mat := gocv.NewMat()
defer mat.Close()
return &tracker{
detector: &PersonDetector,
input: video,
//viewer: window,
img: mat,
}
}
func (t *tracker) processFrame() {
// color for people box
color := color.RGBA{0, 0, 255, 0}
// grab new frame from input
if ok := t.input.Read(&t.img); !ok {
fmt.Printf("Device closed")
return
}
if t.img.Empty() {
fmt.Print("hello")
return
}
fmt.Printf("Device closed")
// resize image
fact := float64(400) / float64(t.img.Cols())
newY := float64(t.img.Rows()) * fact
gocv.Resize(t.img, &t.img, image.Point{X: 400, Y: int(newY)}, 0, 0, 1)
// detect person
rects := t.detector.DetectMultiScaleWithParams(t.img, 0, image.Point{X: 8, Y: 8}, image.Point{X: 16, Y: 16}, 1.05, 2, false)
fmt.Printf("found %d persons\n", len(rects))
for _, r := range rects {
gocv.Rectangle(&t.img, r, color, 3)
size := gocv.GetTextSize("Human", gocv.FontHersheyPlain, 1.2, 2)
pt := image.Pt(r.Min.X+(r.Min.X/2)-(size.X/2), r.Min.Y-2)
gocv.PutText(&t.img, "Human", pt, gocv.FontHersheyPlain, 1.2, color, 2)
}
// show the image in the window and set peoples location
//t.viewer.IMShow(t.img)
}
// func trackPersons() {
// // color for the rect when faces detected
// // define default hog descriptor
// hog := gocv.NewHOGDescriptor()
// defer hog.Close()
// err := hog.SetSVMDetector(gocv.HOGDefaultPeopleDetector())
// if err != nil {
// fmt.Printf("error setting SVM Detector")
// return
// }
// // color for the rect when faces detected
// blue := color.RGBA{0, 0, 255, 0}
// // // open webcam
// //webcam, err := gocv.OpenVideoCapture(0)
// // if err != nil {
// // fmt.Printf("error opening video capture device")
// // return
// // }
// // defer webcam.Close()
// //Use file
// file := os.Args[1]
// webcam, err := gocv.VideoCaptureFile(file)
// if err != nil {
// fmt.Printf("error opening video file")
// return
// }
// defer webcam.Close()
// //open display window
// window := gocv.NewWindow("Person Detect")
// defer window.Close()
// // prepare image matrix
// img := gocv.NewMat()
// defer img.Close()
// for {
// if ok := webcam.Read(&img); !ok {
// fmt.Printf("Device closed")
// return
// }
// if img.Empty() {
// continue
// }
// //resize image
// fact := float64(400) / float64(img.Cols())
// newY := float64(img.Rows()) * fact
// gocv.Resize(img, &img, image.Point{X: 400, Y: int(newY)}, 0, 0, 1)
// // detect person
// //rects := hog.DetectMultiScale(img)
// rects := hog.DetectMultiScaleWithParams(img, 0, image.Point{X: 8, Y: 8}, image.Point{X: 16, Y: 16}, 1.05, 2, false)
// fmt.Printf("found %d persons\n", len(rects))
// for _, r := range rects {
// gocv.Rectangle(&img, r, blue, 3)
// size := gocv.GetTextSize("Human", gocv.FontHersheyPlain, 1.2, 2)
// pt := image.Pt(r.Min.X+(r.Min.X/2)-(size.X/2), r.Min.Y-2)
// gocv.PutText(&img, "Human", pt, gocv.FontHersheyPlain, 1.2, blue, 2)
// }
// // show the image in the window, and wait 1 millisecond
// window.IMShow(img)
// if window.WaitKey(1) >= 0 {
// break
// }
// }
// }