commit 4c45fa95c19ad11a176557b32832a8d32ad733aa
Author: Ethanfel <ethan.fel@ts-pc.fr>
Date:   Sun Jan 18 13:35:49 2026 +0100

    Add sharp_node.py

diff --git a/sharp_node.py b/sharp_node.py
new file mode 100644
index 0000000..b430dc7
--- /dev/null
+++ b/sharp_node.py
@@ -0,0 +1,72 @@
+import torch
+import numpy as np
+import cv2
+
+class SharpFrameSelector:
+    @classmethod
+    def INPUT_TYPES(s):
+        return {
+            "required": {
+                "images": ("IMAGE",),
+                "selection_method": (["batched", "best_n"],),
+                "batch_size": ("INT", {"default": 24, "min": 1, "max": 10000, "step": 1}),
+                "num_frames": ("INT", {"default": 10, "min": 1, "max": 10000, "step": 1}),
+            }
+        }
+
+    RETURN_TYPES = ("IMAGE", "INT")
+    RETURN_NAMES = ("selected_images", "count")
+    FUNCTION = "process_images"
+    CATEGORY = "SharpFrames"
+    
+    def process_images(self, images, selection_method, batch_size, num_frames):
+        # images is a Tensor: [Batch, Height, Width, Channels] (RGB, 0.0-1.0)
+        
+        total_input_frames = len(images)
+        print(f"[SharpSelector] Analyzing {total_input_frames} frames...")
+        
+        scores = []
+
+        # We must iterate to calculate score per frame
+        # OpenCV runs on CPU, so we must move frame-by-frame or batch-to-cpu
+        for i in range(total_input_frames):
+            # 1. Grab single frame, move to CPU, convert to numpy
+            # 2. Scale 0.0-1.0 to 0-255
+            img_np = (images[i].cpu().numpy() * 255).astype(np.uint8)
+            
+            # 3. Convert RGB to Gray for Laplacian
+            gray = cv2.cvtColor(img_np, cv2.COLOR_RGB2GRAY)
+            
+            # 4. Calculate Variance of Laplacian
+            score = cv2.Laplacian(gray, cv2.CV_64F).var()
+            scores.append(score)
+
+        selected_indices = []
+
+        # --- SELECTION LOGIC ---
+        if selection_method == "batched":
+            # Best frame every N frames
+            for i in range(0, total_input_frames, batch_size):
+                chunk_end = min(i + batch_size, total_input_frames)
+                chunk_scores = scores[i : chunk_end]
+                
+                # argmax gives relative index (0 to batch_size), add 'i' for absolute
+                best_in_chunk_idx = np.argmax(chunk_scores)
+                selected_indices.append(i + best_in_chunk_idx)
+                
+        elif selection_method == "best_n":
+            # Top N sharpest frames globally, sorted by time
+            target_count = min(num_frames, total_input_frames)
+            
+            # argsort sorts low to high, we take the last N (highest scores)
+            top_indices = np.argsort(scores)[-target_count:]
+            
+            # Sort indices to keep original video order
+            selected_indices = sorted(top_indices)
+
+        print(f"[SharpSelector] Selected {len(selected_indices)} frames.")
+        
+        # Filter the original GPU tensor using the selected indices
+        result_images = images[selected_indices]
+        
+        return (result_images, len(selected_indices))
\ No newline at end of file