new simple downscaling ideas

color/test.go

@@ -0,0 +1,12 @@
+package main
+
+import "image/color"
+
+func main() {
+	c1, c2 := color.Black,
+		color.Gray16Model.Convert(color.RGBA{})
+
+	println(c1.RGBA())
+	println(c2.RGBA())
+	println(c1 == c2)
+}