From d2b9ea0b7a0ceaade97daa1997651ebce0858bb6 Mon Sep 17 00:00:00 2001
From: Premik <842962+Premik@users.noreply.github.com>
Date: Mon, 24 Nov 2025 19:56:36 +0100
Subject: [PATCH] Transparency

---
 image_warper.py     | 10 +++++-----
 img_patch_editor.py | 32 ++++++++++++++++++++++++++++----
 nodes.py            | 19 ++++++++++++++++++-
 3 files changed, 51 insertions(+), 10 deletions(-)

diff --git a/image_warper.py b/image_warper.py
index c8df598..8eeffbb 100644
--- a/image_warper.py
+++ b/image_warper.py
@@ -96,11 +96,11 @@ class ImageWarper:
             print("RANSAC failed to find a model.")
             return edited.resize(original.size, Image.Resampling.LANCZOS)
 
-        print(f"Matches: {len(matches12)}")
-        print(f"Inliers: {np.sum(inliers)}")
-        print(f"Scale: {model_robust.scale:.4f}")
-        print(f"Rotation: {model_robust.rotation:.4f} rad")
-        print(f"Translation: {model_robust.translation}")
+        # print(f"Matches: {len(matches12)}")
+        # print(f"Inliers: {np.sum(inliers)}")
+        # print(f"Scale: {model_robust.scale:.4f}")
+        # print(f"Rotation: {model_robust.rotation:.4f} rad")
+        # print(f"Translation: {model_robust.translation}")
 
         # Warp the edited image
         edited_arr = np.array(edited.convert('RGBA'))
diff --git a/img_patch_editor.py b/img_patch_editor.py
index b2b57b5..223f045 100644
--- a/img_patch_editor.py
+++ b/img_patch_editor.py
@@ -139,6 +139,8 @@ class PatchMerger:
     min_area_size: int = 4
     threshold: int = 10
     blur_radius: float = 3.0
+    mask_expansion: int = 0
+    edit_max_alpha: float = 1.0
 
     @cached_property
     def raw_mask(self) -> Image.Image:
@@ -157,8 +159,24 @@ class PatchMerger:
         return mask
 
     @cached_property
-    def final_mask(self) -> Image.Image:
+    def sized_mask(self) -> Image.Image:
         mask = self.raw_mask
+        if self.mask_expansion == 0:
+            return mask
+
+        # The kernel size for a radius of N is 2*N+1
+        size = abs(self.mask_expansion) * 2 + 1
+
+        if self.mask_expansion > 0:
+            # Expand (Dilation)
+            return mask.filter(ImageFilter.MaxFilter(size))
+        else:
+            # Shrink (Erosion)
+            return mask.filter(ImageFilter.MinFilter(size))
+
+    @cached_property
+    def final_mask(self) -> Image.Image:
+        mask = self.sized_mask
         if self.blur_radius > 0:
             mask = mask.filter(ImageFilter.GaussianBlur(self.blur_radius))
         return mask
@@ -167,8 +185,14 @@ class PatchMerger:
     def merged_image(self) -> Image.Image:
         img1, img2 = self.detector.images
         mask = self.final_mask
-        # Composite img2 onto img1 using mask
-        return Image.composite(img2, img1, mask)
+
+        if self.edit_max_alpha >= 1.0:
+            # Composite img2 onto img1 using mask
+            return Image.composite(img2, img1, mask)
+
+        # Blend original and edited images
+        blended_img = Image.blend(img1, img2, self.edit_max_alpha)
+        return Image.composite(blended_img, img1, mask)
 
     @cached_property
     def debug_overlay(self) -> Image.Image:
@@ -183,7 +207,7 @@ class PatchMerger:
         blended = Image.alpha_composite(overlay, highlight)
 
         # Composite using mask
-        return Image.composite(blended, overlay, self.raw_mask)
+        return Image.composite(blended, overlay, self.sized_mask)
 
     @property
     def base_name(self) -> str:
diff --git a/nodes.py b/nodes.py
index c5cb572..4d2d6c9 100644
--- a/nodes.py
+++ b/nodes.py
@@ -29,6 +29,14 @@ class ImgPatchNode:
                     "FLOAT",
                     {"default": 3.0, "min": 0.0, "max": 100.0, "step": 0.1, "tooltip": "Radius of the gaussian blur applied to the mask."},
                 ),
+                "mask_expansion": (
+                    "INT",
+                    {"default": 0, "min": -128, "max": 128, "tooltip": "Expand or shrink the mask. Positive values expand, negative values shrink."},
+                ),
+                "edit_max_alpha": (
+                    "FLOAT",
+                    {"default": 1.0, "min": 0.0, "max": 1.0, "step": 0.01, "tooltip": "Maximum alpha for the edited image overlay."},
+                ),
                 "allow_rescale": ("BOOLEAN", {"default": False, "tooltip": "If true, rescales the edited image to match original size."}),
             },
         }
@@ -55,6 +63,8 @@ class ImgPatchNode:
         min_area_size: int,
         threshold: int,
         blur_radius: float,
+        mask_expansion: int,
+        edit_max_alpha: float,
         allow_rescale: bool,
     ) -> Tuple[torch.Tensor, torch.Tensor, torch.Tensor, torch.Tensor, torch.Tensor]:
 
@@ -85,7 +95,14 @@ class ImgPatchNode:
                 allow_rescale=allow_rescale,
                 detection_alg=detection_alg,
             )
-            merger = PatchMerger(detector=detector, min_area_size=min_area_size, threshold=threshold, blur_radius=blur_radius)
+            merger = PatchMerger(
+                detector=detector,
+                min_area_size=min_area_size,
+                threshold=threshold,
+                blur_radius=blur_radius,
+                mask_expansion=mask_expansion,
+                edit_max_alpha=edit_max_alpha,
+            )
 
             out_merged.append(self._pil_to_tensor(merger.merged_image))
             out_final_masks.append(self._mask_to_tensor(merger.final_mask))