| 基于灰度差分和二维最大熵阈值的新闻字幕检测* |
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| 引用本文： | 陈树越,张世林.基于灰度差分和二维最大熵阈值的新闻字幕检测*[J].计算机应用研究,2011,28(8):3195-3197. |
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| 作者姓名： | 陈树越 张世林 |
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| 作者单位： | 常州大学信息科学与工程学院,江苏常州,213164 |
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| 基金项目： | 江苏省高校自然科学基金资助项目（08KJB520002） |
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| 摘 要： | 针对新闻视频帧中文本区域的定位提取问题，提出了一种有效的字幕定位提取方法。通过灰度差分和变异灰度直方图对新闻视频帧字幕区域定位，再经改进的二维最大熵阈值方法对分割出的文字区域进行二值化，得到可识别的文字图片。最后对文本定位和OCR识别情况进行了算法对比。实验表明：与传统的投影法和最大熵方法相比，该方法可有效地提高文本定位的查全率和OCR的识别率。
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| 关 键 词： | 文本定位 文本提取 灰度差分统计 变异灰度直方图 二维最大熵 印刷体识别 |
Detection of news captions based on gray-scale difference statistics and two-dimensional maximum entropy threshold |
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| CHEN Shu-yue,ZHANG Shi-lin.Detection of news captions based on gray-scale difference statistics and two-dimensional maximum entropy threshold[J].Application Research of Computers,2011,28(8):3195-3197. |
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| Authors: | CHEN Shu-yue ZHANG Shi-lin |
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| Affiliation: | CHEN Shu-yue,ZHANG Shi-lin(School of Information Science & Engineering,Changzhou University,Changzhou 213164,China) |
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| Abstract: | As to the problem to locate and extract the text region of the news in video frames,this paper proposed an effective methodology for caption location and extraction.It used the gray-scale difference statistics and local gray-scale histogram to locate the text region of the video frame,then applied improved two-dimensional maximum entropy threshold to extract the segmented text area to obtain a binarized image.Finally,analyzed the abilities of several algorithms by comparison for text location and optical ch... |
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| Keywords: | text location text extraction gray-scale difference statistics variant gray-scale histogram(VGH) two-dimensional maximum entropy optical character recognition(OCR) |
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