License Plate Exercise
Published: Friday, 27 December 2013
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| Rear Image of a Car with License Plate |
Goal: Extract the license numbers from the image.
Approach: Use the square grid. Several solutions. For extracting the region of the plate use the clohole working on the white sets
Keywords: opening by adjunction, opening by reconstruction, anisotropy, residual, top hat
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1. Tresholded Image |
2. TopHat to Retain Details Including the Letters |
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3. Fill the Holes to Extract Letters |
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4. Difference Image |
5. Geodesically dilated image after opening the initial image to remove some remaining grains/noise. |
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Comment: The approach was based on the nested succession of dark(outside)-white(plate)-dark(letters inside the plate). Note that we were not disturbed by the white stripe – the white vertical illumination stripe.
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