Car License Plate Recognition

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Presentation transcript:

Car License Plate Recognition 18-793 Pattern Recognition Theory Alexandre Alahi Alok Menghrajani

Overview FR 162616 Mesh Plate Extrapolation Localization Plate Image Raw Image FR Character Extraction Letter Recognition Digit / Letter Separation Spacial Sort 162616 Digit Recognition

Letter / Digit Separation Aspect ratio Locating the dot Locating the icons Back Vertical Back Horizontal Front Horizontal

Character Extraction Graph of projected points on x-axis for top part Graph of projected points on x-axis for Bottom part Black and white license plate Graph of projected points on y-axis

Digit Recognition 4 Binarize Crop Clustering Correlation In The Image Domain Best Match 4 Image Preprocessing Mean Of Pixel Values Filters Raw Training Data

Letter Recognition Second Letter First Letter We use a valid state code matrix in order to significantly improve our results.

Remove Content Of Plate Plate Localization Find Approx. Location Remove Content Of Plate Raw Image Ladder Algorithm Mesh Extrapolation Plate Image

Demo