| 摘要 |
PURPOSE: A method is provided to extract a car license number plate area based on a C-L algorithm. CONSTITUTION: A car license number plate area is obtained based on a color tone information. Car license number plate area coordinates(X1, Y1),(X2, Y2) are obtained based on a light and darkness change information. The light and darkness change information is extracted from a car image information and stored by a special arrangement. Extract location coordinates are searched based on the car license number plate area coordinates(X1, Y1),(X2, Y2). Exact car license number plate area coordinates(X1", Y1"),(X2", Y2") are obtained by using car license number plate area coordinates(X1, Y1),(X2, Y2).
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