[OpenCV] Chapter01-08 Making your app interactive via handling user input from mouse

Read image from file

Source Code

package main

import (
 "gocv.io/x/gocv"
 "log"
)

func main() {
 imageFilePath := "../../data/Lena.png"
 mat := gocv.IMRead(imageFilePath, gocv.IMReadAnyColor)
 if mat.Empty() {
  log.Panic("Can not read Image file : ", imageFilePath)
  return
 }

 matCopied := gocv.NewMat()
 mat.CopyTo(&matCopied)

 for {
  // gocv has yet no mouse event handler
  // so I use selectROI for capture image
  rectangle := gocv.SelectROI("Original Image", mat)
  regionMat := matCopied.Region(rectangle)

  if !regionMat.Empty() {
   log.Println(regionMat)
   capture := gocv.NewWindow("Capture")
   capture.IMShow(regionMat)
  }
 }
}

Execute Result