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电子学报  2015 

基于MAP的单帧字符图像超分辨率重建

DOI: 10.3969/j.issn.0372-2112.2015.01.030, PP. 191-197

Keywords: 图像重建,超分辨率,最大后验估计,纹理分析,字符识别

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Abstract:

字符是很多图像处理应用关注的区域,增强字符图像分辨率往往能提高字符识别率.针对字符图像纵横和对角线方向纹理特征,提出了一种提取不同方向纹理及图像平滑度度量的新方法,并在最大后验概率框架下,实现了单帧图像超分辨率重建算法.算法利用自适应可调模板作为卷积核,将纹理信息引入图像先验模型,最终将超分辨率重建转化为一个目标函数最优化问题.实验表明,该算法能有效提高字符图像的识别率,且对噪声具有较好的鲁棒性.

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