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基于LHBP多尺度向性滤波的文字检测算法

DOI: 10.11834/jig.20100806

Keywords: 文字检测,Haar小波,LHBP,支持向量机

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Abstract:

复杂光照条件和文字―背景的交融是自然场景图像中文字检测的主要难点。为解决该问题,提出了基于LHBP(localHaarbinarypattern)多尺度向性滤波的文字检测算法。该算法首先采用对光强变化不敏感并具文字特征显式描述特点的LHBP模式的纹理描述算子;并在LHBP模式上采用多尺度向性滤波器MDF(multi-scaledirectionalfiltering)来确定候选文字区域;最后使用基于LHBP直方图的支持向量机法精确定位文字区域。实验结果表明,与其他主流算法相比,该算法能够去除复杂光照条件和文字―背景交融的影响,具有更好的性能。

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