experimental: Add CV2 Infill

invokeai/backend/image_util/cv2_inpaint.py

@@ -0,0 +1,20 @@
+import cv2
+import numpy as np
+from PIL import Image
+
+
+def cv2_inpaint(image: Image.Image) -> Image.Image:
+    # Prepare Image
+    image_array = np.array(image.convert("RGB"))
+    image_cv = cv2.cvtColor(image_array, cv2.COLOR_RGB2BGR)
+
+    # Prepare Mask From Alpha Channel
+    mask = image.split()[3].convert("RGB")
+    mask_array = np.array(mask)
+    mask_cv = cv2.cvtColor(mask_array, cv2.COLOR_BGR2GRAY)
+    mask_inv = cv2.bitwise_not(mask_cv)
+
+    # Inpaint Image
+    inpainted_result = cv2.inpaint(image_cv, mask_inv, 3, cv2.INPAINT_TELEA)
+    inpainted_image = Image.fromarray(cv2.cvtColor(inpainted_result, cv2.COLOR_BGR2RGB))
+    return inpainted_image