关键词: 反色判断, 像素比例, 垂直投影

Abstract:

The paper presents a new method for judging whether the color of a binary license plate needs to be reversed.The reverse color judgment is made by calculating the proportion of white pixels between 2 and 6 characters areas of a license plate as well as the white pixel ratio of vertical projection.Experiments show that this method has high accuracy.

Key words: reverse color judgment;pixels ratio;vertical projection