Add Morphology nodes from kornia (#2781)

* import kornia

* Added morphology nodexs

* Add kornia to requirements

* fix choices

* options, also move to postprocessors

* fix placing and step

comfy_extras/nodes_morphology.py

@@ -0,0 +1,49 @@
+import torch
+import comfy.model_management
+
+from kornia.morphology import dilation, erosion, opening, closing, gradient, top_hat, bottom_hat
+
+
+class Morphology:
+    @classmethod
+    def INPUT_TYPES(s):
+        return {"required": {"image": ("IMAGE",),
+                                "operation": (["erode",  "dilate", "open", "close", "gradient", "bottom_hat", "top_hat"],),
+                                "kernel_size": ("INT", {"default": 3, "min": 3, "max": 999, "step": 1}),
+                                }}
+
+    RETURN_TYPES = ("IMAGE",)
+    FUNCTION = "process"
+
+    CATEGORY = "image/postprocessing"
+
+    def process(self, image, operation, kernel_size):
+        device = comfy.model_management.get_torch_device()
+        kernel = torch.ones(kernel_size, kernel_size, device=device)
+        image_k = image.to(device).movedim(-1, 1)
+        if operation == "erode":
+            output = erosion(image_k, kernel)
+        elif operation == "dilate":
+            output = dilation(image_k, kernel)
+        elif operation == "open":
+            output = opening(image_k, kernel)
+        elif operation == "close":
+            output = closing(image_k, kernel)
+        elif operation == "gradient":
+            output = gradient(image_k, kernel)
+        elif operation == "top_hat":
+            output = top_hat(image_k, kernel)
+        elif operation == "bottom_hat":
+            output = bottom_hat(image_k, kernel)
+        else:
+            raise ValueError(f"Invalid operation {operation} for morphology. Must be one of 'erode', 'dilate', 'open', 'close', 'gradient', 'tophat', 'bottomhat'")
+        img_out = output.to(comfy.model_management.intermediate_device()).movedim(1, -1)
+        return (img_out,)
+
+NODE_CLASS_MAPPINGS = {
+    "Morphology": Morphology,
+}
+
+NODE_DISPLAY_NAME_MAPPINGS = {
+    "Morphology": "ImageMorphology",
+}