Add halftone dot effect style

app.py

@@ -61,6 +61,21 @@ def stylize(img, style, hex_color):
         # fallback: high-contrast sharpened grayscale
         return ImageOps.autocontrast(ImageEnhance.Sharpness(img.convert("L")).enhance(3.0), cutoff=2).convert("RGB")
 
+    if style == "halftone":
+        gray = np.array(ImageOps.autocontrast(img.convert("L"), cutoff=2), dtype=np.float32)
+        out  = Image.new("RGB", img.size, (245, 245, 245))
+        draw = ImageDraw.Draw(out)
+        cell = 7
+        for cy in range(cell // 2, img.height, cell):
+            for cx in range(cell // 2, img.width, cell):
+                patch = gray[max(0, cy - cell//2):cy + cell//2 + 1,
+                             max(0, cx - cell//2):cx + cell//2 + 1]
+                radius = (1 - patch.mean() / 255.0) * (cell / 2) * 0.95
+                if radius > 0.5:
+                    draw.ellipse([cx - radius, cy - radius, cx + radius, cy + radius],
+                                 fill=(r, g, b))
+        return out
+
     if style == "duotone":
         gray = ImageOps.autocontrast(img.convert("L"), cutoff=2)
         gray = ImageOps.posterize(gray, 3)
@@ -615,7 +630,7 @@ with gr.Blocks(title="stamp maker ✦") as demo:
                 elem_classes=["color-pick"],
             )
             style_in = gr.Radio(
-                choices=["duotone", "grayscale", "pop art", "sepia", "engraving ✦"],
+                choices=["duotone", "grayscale", "pop art", "sepia", "halftone", "engraving ✦"],
                 value="duotone",
                 label="style",
                 elem_classes=["style-pick"],