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