ToImage too slow?

[evan176]

Hi,

I want to convert IplImage to go's image type, but ToImage function is too slow. Is this project alive?

Thanks

[evan176]

I think overhead is in calling C/C++ code. Maybe we can firstly convert IplImage to custom structure and passed to Go, rather than frequent use of Get2D function.

[lbeeon]

@evan176 I suggest that don't use ToImage method. The implementation had some problems while assign channels. I write a new ToImage method, see blow

func ToImage(img *opencv.IplImage) image.Image {
	dst := image.NewRGBA(image.Rectangle{
		Min: image.Point{X: 0, Y: 0},
		Max: image.Point{X: img.Width(), Y: img.Height()},
	})
	for x := 0; x < img.Width(); x++ {
		for y := 0; y < img.Height(); y++ {
			channels := img.Get2D(x, y).Val()
			dst.SetRGBA(x, y, color.RGBA{
				B: uint8(channels[0]),
				G: uint8(channels[1]),
				R: uint8(channels[2]),
				A: uint8(channels[3]),
			})
		}
	}
	return dst
}

Inspired by the method 'FromImage'