| 质量退化的车牌字符分割方法 |
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| 引用本文： | 李文举,梁德群,王新年,于东. 质量退化的车牌字符分割方法[J]. 计算机辅助设计与图形学学报, 2004, 16(5): 697-700 |
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| 作者姓名： | 李文举 梁德群 王新年 于东 |
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| 作者单位： | 辽宁师范大学计算机与信息技术学院,大连,116029;大连海事大学信息工程学院,大连,116026;大连海事大学信息工程学院,大连,116026 |
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| 摘 要： | 提出一种车牌字符分割方法．首先，进行光照不均校正、对比度增强和倾斜校正；其次，对字符外轮廓垂直距离采用尺度自适应三次B样条小波变换进行字符的粗分割；最后，应用基于目标占有率模板匹配的字符识别反馈进行字符的精分割．实验结果表明，文中方法对光照不均、对比度较小、倾斜、污迹、字符粘连和断裂等严重退化的车牌图像具有很好的字符分割性能．
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| 关 键 词： | 车牌字符分割 倾斜校正 自适应小波变换 目标占有率模板匹配 识别反馈 |
Character Segmentation for Degraded License Plate |
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| Li Wenju ,) Liang Dequn ) Wang Xinnian ) Yu dong ) ). Character Segmentation for Degraded License Plate[J]. Journal of Computer-Aided Design & Computer Graphics, 2004, 16(5): 697-700 |
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| Authors: | Li Wenju ) Liang Dequn ) Wang Xinnian ) Yu dong ) ) |
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| Affiliation: | Li Wenju 1,2) Liang Dequn 2) Wang Xinnian 2) Yu dong 2) 1) |
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| Abstract: | A license plate character segmentation algorithm, robust to poor images is presented First, the non uniform illumination correction, contrast enhancement and incline correction operations are introduced; then, the scale adaptive cubic B spline wavelet transform is applied to the outer contour vertical distance of character regions for coarse segmentation; finally, character recognition feedback with template matching based on object occupancy rate is used for fine segmentation Experimental results show that the proposed algorithm is robust in dealing with uniform illuminated, contrast poor, declining, dirt, character touching and character broken number plates |
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| Keywords: | License plate character segmentation Tilt correction Adaptive wavelet transform Object occupancy rate template matching Recognition feedback |
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