Function differenceFull

primitive/core.go:65–89

(a, b *image.RGBA)

}

func differenceFull(a, b *image.RGBA) float64 {
	size := a.Bounds().Size()
	w, h := size.X, size.Y
	var total uint64
	for y := 0; y < h; y++ {
		i := a.PixOffset(0, y)
		for x := 0; x < w; x++ {
			ar := int(a.Pix[i])
			ag := int(a.Pix[i+1])
			ab := int(a.Pix[i+2])
			aa := int(a.Pix[i+3])
			br := int(b.Pix[i])
			bg := int(b.Pix[i+1])
			bb := int(b.Pix[i+2])
			ba := int(b.Pix[i+3])
			i += 4
			dr := ar - br
			dg := ag - bg
			db := ab - bb
			da := aa - ba
			total += uint64(dr*dr + dg*dg + db*db + da*da)
		}
	}
	return math.Sqrt(float64(total)/float64(w*h*4)) / 255
}

func differencePartial(target, before, after *image.RGBA, score float64, lines []Scanline) float64 {
	size := target.Bounds().Size()