摘要
Ostu算法因其具有算法实现简单等特点成为常用的一种图像二值化算法,但其对于不均匀光照下的QR码图像二值化处理效果不佳。针对Ostu算法这一缺点,提出一种解决方法:首先使用改进的同态滤波去除QR图像的不均匀光照的影响,然后采用Ostu算法对QR图像进行二值化。实验表明,使用该算法能有效克服不均匀光照的影响,二值化效果良好,条码识别率提高。
Ostu algorithm has become commonly used as image binarization algorithm because of its simplicity in realization, but it can not deal with the QR-Coded image under non-uniformed illumination. This paper puts forward a solution to overcome this disadvantage. Firstly, it adopts the improved homomorphic filtering algorithm to enhance the QR-Coded image quality to eliminate the negative effect of the non-uniformed illumination, then the QR-Coded image is binarized by the Ostu algorithm. Experimental results show that this algorithm can effectively overcomes the influence of non-uniformed illumination, and the recognition rate of the OR code can be improved.
出处
《太原科技大学学报》
2012年第5期396-400,共5页
Journal of Taiyuan University of Science and Technology
基金
山西省自然科学基金(2009011011-3)
山西省回国留学人员科研资助项目(2011078)
关键词
QR码
二值化
同态滤波
OSTU算法
QR code, binarize, homomorphic filtering, Ostu algorithm
