| 一种基于变异灰度直方图的视频字幕检测定位方法 |
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| 引用本文： | 张佑生,彭青松,汪荣贵.一种基于变异灰度直方图的视频字幕检测定位方法[J].电子学报,2004,32(2):314-317. |
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| 作者姓名： | 张佑生 彭青松 汪荣贵 |
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| 作者单位： | 合肥工业大学计算机与信息学院,安徽合肥 230009 |
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| 摘 要： | 为实现视频图像中字幕的快速检测与定位,本文提出一种变异灰度直方图VGH.文章给出VGH的定义,对其中的特征及其与图像中字幕的映射关系作了分析,并在此基础上给出视频字幕的检测与定位方法.该方法将垂直子图像转换为基于行的VGH (VGHR),将水平子图像转换为基于列的VGH (VGHC),通过对其中的凹谷特征和梳状凸台特征的识别,实现对字幕的检测与定位.文章最后给出某些实验结果,表明了算法的有效性.
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| 关 键 词： | 灰度直方图 变异灰度直方图 视频图像 字幕检测与定位 |
| 文章编号： | 0372-2112(2004)02-0314-04 |
| 收稿时间： | 2002-07-02 |
A Method of Caption Detection and Location in Video Images Based on Variant Gray-Scale Histogram |
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| ZHANG You sheng,PENG Qing song,WANG Rong gui.A Method of Caption Detection and Location in Video Images Based on Variant Gray-Scale Histogram[J].Acta Electronica Sinica,2004,32(2):314-317. |
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| Authors: | ZHANG You sheng PENG Qing song WANG Rong gui |
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| Affiliation: | School of Computer & Information,Hefei University of Technology,Hefei,Anhui 230009,China |
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| Abstract: | The paper presents a variant gray scale histogram (VGH) for the purpose of detecting and locating captions in video images.The definition of VGH is given and the mapping relationships are analyzed between features in VGH and captions in an image.Then,we proposed an algorithm for detecting and locating captions in an image by recognizing the features,including both valleys in row based VGH of a vertical sub image and convexes in column based VGH of a horizontal sub image.Some experimental results are given in the end of the paper showing validity of the algorithm. |
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| Keywords: | gray scale histogram variant gray scale histogram video image caption detection and location |
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