From ffdf02f9b16f6690290d5544ba0bdcdc0f851c5b Mon Sep 17 00:00:00 2001
From: Terry Jia <terryjia88@gmail.com>
Date: Mon, 15 Dec 2025 21:10:43 -0500
Subject: [PATCH] add node - image compare

---
 comfy_api/latest/_io.py             | 13 +++++++
 comfy_extras/nodes_image_compare.py | 53 +++++++++++++++++++++++++++++
 nodes.py                            |  1 +
 3 files changed, 67 insertions(+)
 create mode 100644 comfy_extras/nodes_image_compare.py

diff --git a/comfy_api/latest/_io.py b/comfy_api/latest/_io.py
index 4b14e5ded..278ed45ec 100644
--- a/comfy_api/latest/_io.py
+++ b/comfy_api/latest/_io.py
@@ -1100,6 +1100,18 @@ class DynamicSlot(ComfyTypeI):
             for input in self.inputs:
                 input.validate()
 
+@comfytype(io_type="IMAGECOMPARE")
+class ImageCompare(ComfyTypeI):
+  Type = dict
+
+  class Input(WidgetInput):
+      def __init__(self, id: str, display_name: str=None, optional=False, tooltip: str=None,
+                   socketless: bool=True):
+          super().__init__(id, display_name, optional, tooltip, None, None, socketless)
+
+      def as_dict(self):
+          return super().as_dict()
+
 def add_dynamic_id_mapping(d: dict[str, Any], inputs: list[Input], curr_prefix: str, self: DynamicInput=None):
     dynamic = d.setdefault("dynamic_paths", {})
     if self is not None:
@@ -1917,4 +1929,5 @@ __all__ = [
     "add_to_dict_v1",
     "add_to_dict_v3",
     "V3Data",
+    "ImageCompare",
 ]
diff --git a/comfy_extras/nodes_image_compare.py b/comfy_extras/nodes_image_compare.py
new file mode 100644
index 000000000..8e9f809e6
--- /dev/null
+++ b/comfy_extras/nodes_image_compare.py
@@ -0,0 +1,53 @@
+import nodes
+
+from typing_extensions import override
+from comfy_api.latest import IO, ComfyExtension
+
+
+class ImageCompare(IO.ComfyNode):
+    """Compares two images with a slider interface."""
+
+    @classmethod
+    def define_schema(cls):
+        return IO.Schema(
+            node_id="ImageCompare",
+            display_name="Image Compare",
+            description="Compares two images side by side with a slider.",
+            category="image",
+            is_experimental=True,
+            is_output_node=True,
+            inputs=[
+                IO.Image.Input("image_a", optional=True),
+                IO.Image.Input("image_b", optional=True),
+                IO.ImageCompare.Input("compare_view"),
+            ],
+            outputs=[],
+        )
+
+    @classmethod
+    def execute(cls, image_a=None, image_b=None, compare_view=None) -> IO.NodeOutput:
+        result = {"a_images": [], "b_images": []}
+
+        preview_node = nodes.PreviewImage()
+
+        if image_a is not None and len(image_a) > 0:
+            saved = preview_node.save_images(image_a, "comfy.compare.a")
+            result["a_images"] = saved["ui"]["images"]
+
+        if image_b is not None and len(image_b) > 0:
+            saved = preview_node.save_images(image_b, "comfy.compare.b")
+            result["b_images"] = saved["ui"]["images"]
+
+        return IO.NodeOutput(ui=result)
+
+
+class ImageCompareExtension(ComfyExtension):
+    @override
+    async def get_node_list(self) -> list[type[IO.ComfyNode]]:
+        return [
+            ImageCompare,
+        ]
+
+
+async def comfy_entrypoint() -> ImageCompareExtension:
+    return ImageCompareExtension()
diff --git a/nodes.py b/nodes.py
index 7d83ecb21..0f773ed9c 100644
--- a/nodes.py
+++ b/nodes.py
@@ -2359,6 +2359,7 @@ async def init_builtin_extra_nodes():
         "nodes_nop.py",
         "nodes_kandinsky5.py",
         "nodes_wanmove.py",
+        "nodes_image_compare.py",
     ]
 
     import_failed = []