Gocv image cutting and display

gocv Realize picture clipping

New window

window := gocv.NewWindow("Hello")

Read the picture

read := gocv.IMRead("image/front.jpg", gocv.IMReadColor)

Type conversion

frontImg, _ := read.ToImage()

Color type

rgbImg := frontImg.(*image.RGBA)

Picture cutting ：Rect Function (950,100) Top left coordinates , Bottom left coordinates （1300,700） It can be cut into rectangle

subImg := rgbImg.SubImage(image.Rect(950, 100, 1300, 700)).(*image.RGBA)

Store image

out, _ := os.Create("image/front_face.jpg")
png.Encode(out, subImg)

Read the picture

result := gocv.IMRead("image/front_face.jpg",gocv.IMReadColor)

Set the window size according to the above picture size

window.ResizeWindow(1300-950,700-100)

Picture display to window

window.IMShow(result)
window.WaitKey(0)