hybridgroup.gobot/examples/opencv_face_detect.go

//go:build example
// +build example

//
// Do not build by default.

package main

import (
	"path"
	"runtime"
	"sync/atomic"
	"time"

	"gobot.io/x/gobot/v2"
	"gobot.io/x/gobot/v2/platforms/opencv"
	"gocv.io/x/gocv"
)

var img atomic.Value

func main() {
	_, currentfile, _, _ := runtime.Caller(0)
	cascade := path.Join(path.Dir(currentfile), "haarcascade_frontalface_alt.xml")

	window := opencv.NewWindowDriver()
	camera := opencv.NewCameraDriver(1)

	work := func() {
		mat := gocv.NewMat()
		img.Store(mat)

		camera.On(opencv.Frame, func(data interface{}) {
			i := data.(gocv.Mat)
			img.Store(i)
		})

		gobot.Every(10*time.Millisecond, func() {
			i := img.Load().(gocv.Mat)
			if i.Empty() {
				return
			}
			faces := opencv.DetectObjects(cascade, i)
			opencv.DrawRectangles(i, faces, 0, 255, 0, 5)
			window.ShowImage(i)
			window.WaitKey(1)
		})
	}

	robot := gobot.NewRobot("faceBot",
		[]gobot.Connection{},
		[]gobot.Device{window, camera},
		work,
	)

	if err := robot.Start(); err != nil {
		panic(err)
	}
}