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+# Screenshot Difference Detector
+
+This script compares two images (e.g., screenshots) and generates a new, side-by-side image. The original image (left) has visual differences highlighted with red rectangles, and the new image (right) is shown for comparison.
+
+It uses a robust **Morphological Opening** technique to intelligently separate "evident changes" from "irrelevant noise." This is the standard method for cleaning binary images in computer vision.
+
+1.  It finds all pixel differences above a low threshold.
+2.  It uses an **Erosion** pass to remove all small, scattered noise.
+3.  It uses a **Dilation** pass to restore the size of the large, "evident" changes that survived.
+4.  It highlights these remaining clean areas.
+
+## Requirements
+
+-   Python 3.x
+-   `opencv-python`
+-   `imutils`
+-   `numpy`
+
+## Installation
+
+1.  **Clone or download** this repository (or just save `diff_detector.py`).
+
+2.  **Install the required Python libraries** using pip:
+    ```bash
+    pip install opencv-python-headless numpy imutils
+    ```
+
+## Usage
+
+Run the script from your terminal and provide three arguments:
+1.  The path to the first image (the "before" image).
+2.  The path to the second image (the "after" image).
+3.  The path where the *combined output* image should be saved.
+
+### Example
+
+```bash
+python diff_detector.py screenshot_before.png screenshot_after.png diff_combined.png
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diff --git a/#1758_SS_DIFFERENCE_DETECTOR/compare.py b/#1758_SS_DIFFERENCE_DETECTOR/compare.py
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+import cv2
+import imutils
+import numpy as np
+import sys
+import logging
+
+# Configure logging
+logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(message)s')
+
+def compare_images(img_path1, img_path2, output_path):
+    """
+    Compares two images and saves a new image with differences
+    highlighted by red rectangles, using a manual threshold.
+    """
+    # Load the two images
+    try:
+        imageA = cv2.imread(img_path1)
+        imageB = cv2.imread(img_path2)
+        
+        if imageA is None or imageB is None:
+            logging.error("Could not read one or both images. Check file paths.")
+            return
+    except Exception as e:
+        logging.error(f"Error loading images: {e}")
+        return
+
+    # Check if images have the same dimensions
+    if imageA.shape != imageB.shape:
+        logging.warning("Images have different sizes. Resizing second image to match first.")
+        # We must make a copy of imageB for the final output stack
+        imageB_resized = cv2.resize(imageB, (imageA.shape[1], imageA.shape[0]))
+    else:
+        imageB_resized = imageB
+
+    # 1. Convert images to grayscale
+    grayA = cv2.cvtColor(imageA, cv2.COLOR_BGR2GRAY)
+    grayB = cv2.cvtColor(imageB_resized, cv2.COLOR_BGR2GRAY)
+
+    # 2. Compute the absolute difference between the grayscale images
+    diff = cv2.absdiff(grayA, grayB)
+
+    # 3. Apply a low threshold.
+    # This creates a "dirty mask" that includes *all* potential
+    # changes, both signal and noise.
+    thresh = cv2.threshold(diff, 25, 255, cv2.THRESH_BINARY)[1]
+
+    # 4. (THE NEW METHOD) Use Morphological Opening
+    # This is the key. It removes small, scattered noise (irrelevant details)
+    # while preserving large, grouped areas (evident changes).
+    
+    # Define a 5x5 kernel (the "size" of noise to remove)
+    kernel = np.ones((5, 5), np.uint8)
+    
+    # Apply the operation. Erosion (removes noise) -> Dilation (restores signal)
+    clean_mask = cv2.morphologyEx(thresh, cv2.MORPH_OPEN, kernel, iterations=2)
+
+    # 5. Find contours (outlines) on the *clean mask*
+    cnts = cv2.findContours(clean_mask.copy(), cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)
+    cnts = imutils.grab_contours(cnts)
+
+    logging.info(f"Found {len(cnts)} potential differences...")
+
+    # 6. Create a copy of imageA to draw on
+    imageA_with_boxes = imageA.copy()
+
+    # Loop over contours and filter by size
+    diff_count = 0
+    for c in cnts:
+        (x, y, w, h) = cv2.boundingRect(c)
+        
+        # Final filter for any tiny specks that survived
+        if w > 10 and h > 10:
+            diff_count += 1
+            # Draw on the copy
+            cv2.rectangle(imageA_with_boxes, (x, y), (x + w, y + h), (0, 0, 255), 2)
+
+    # 7. Create side-by-side output
+    output_image = np.hstack([imageA_with_boxes, imageB_resized])
+
+    try:
+        cv2.imwrite(output_path, output_image)
+        logging.info(f"Successfully saved diff image to {output_path}")
+        logging.info(f"Highlighted {diff_count} significant difference areas.")
+    except Exception as e:
+        logging.error(f"Error saving output image: {e}")
+
+if __name__ == "__main__":
+    if len(sys.argv) != 4:
+        print("\nUsage: python diff_detector.py <image1_path> <image2_path> <output_path>")
+        print("Example: python diff_detector.py screenshot1.png screenshot2.png diff.png\n")
+        sys.exit(1)
+    
+    img1 = sys.argv[1]
+    img2 = sys.argv[2]
+    output = sys.argv[3]
+    
+    compare_images(img1, img2, output)
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