Enhance image processing by adding additional dither modes: Atkinson and Burkes

Author: Codaea

README.md

@@ -186,7 +186,7 @@ Prints an image from base64-encoded data.
 **Parameters:**
 - `data` (string): Base64-encoded image data (PNG format recommended)
 - `alignment` (string): Image alignment - `"left"`, `"center"`, or `"right"`
-- `dither-mode` (string): Dithering algorithm - `"none"` or `"floydsteinberg"`
+- `dither-mode` (string): Dithering algorithm - `"floydsteinberg"`, `"atkinson"`, `"burkes"`, and `"none"`.
 
 ## Response Codes
 

main.go

@@ -59,6 +59,12 @@ func processImage(i Image) image.Image {
 	case "floydsteinberg":
 		d.Matrix = dither.FloydSteinberg
 		return d.Dither(i.img)
+	case "atkinson":
+		d.Matrix = dither.Atkinson
+		return d.Dither(i.img)
+	case "burkes":
+		d.Matrix = dither.Burkes
+		return d.Dither(i.img)
 	case "none":
 		return i.img
 	default: