Initial commit

utils/to_1ch_white_bg.py

@@ -0,0 +1,33 @@
+#!/usr/bin/env python3
+# to_1ch_white_bg.py
+from PIL import Image
+import sys
+from pathlib import Path
+
+
+def to_1ch_white_bg(in_path: str, out_path: str | None = None) -> str:
+    im = Image.open(in_path)
+
+    # Если есть альфа — композитим на белый
+    if im.mode in ("RGBA", "LA") or ("transparency" in im.info):
+        im = im.convert("RGBA")
+        white = Image.new("RGBA", im.size, (255, 255, 255, 255))
+        im = Image.alpha_composite(white, im).convert("RGB")
+    else:
+        im = im.convert("RGB")
+
+    gray = im.convert("L")  # 1 канал
+    if out_path is None:
+        p = Path(in_path)
+        out_path = str(p.with_name(f"{p.stem}_1ch.png"))
+    gray.save(out_path, format="PNG", optimize=True)
+    return out_path
+
+
+if __name__ == "__main__":
+    if len(sys.argv) < 2:
+        print(
+            "Использование: python to_1ch_white_bg.py input.png [output.png]")
+        sys.exit(1)
+    print(to_1ch_white_bg(sys.argv[1],
+          sys.argv[2] if len(sys.argv) > 2 else None))