failed miserably at hack.lu

2025/hack.lu/rev/FLAN/plot_barcode_segment.py

@@ -0,0 +1,36 @@
+import cv2
+import numpy as np
+import matplotlib.pyplot as plt
+import sys
+
+def plot_barcode_segment(image_path: str, pixels: int = 1000, height: int = 400):
+    # Load image in grayscale
+    img = cv2.imread(image_path, cv2.IMREAD_GRAYSCALE)
+    if img is None:
+        print("❌ Could not open image")
+        sys.exit(1)
+
+    h, w = img.shape
+    print(f"Loaded {w}x{h} image")
+
+    # Crop the first N pixels (widthwise)
+    cropped = img[:, :min(pixels, w)]
+
+    # Stretch vertically for visualization
+    scaled = cv2.resize(cropped, (cropped.shape[1], height), interpolation=cv2.INTER_NEAREST)
+
+    # Display
+    plt.figure(figsize=(12, 4))
+    plt.imshow(scaled, cmap="gray", aspect="auto")
+    plt.title(f"First {pixels} pixels of barcode (height scaled to {height}px)")
+    plt.axis("off")
+    plt.savefig("barcode_segment.png", bbox_inches="tight", dpi=150)
+
+
+if __name__ == "__main__":
+    if len(sys.argv) < 2:
+        print("Usage: python plot_barcode_segment.py <barcode_image>")
+        sys.exit(1)
+
+    plot_barcode_segment(sys.argv[1])
+