Abstract: A simple and effective method is presented for real－time text segmentation and recognition in videos.Firstly，an algorithm is provided which detects text event and gets edges，then makes a size restrict to the edges and eventually wipes off non-text regions according to the textual energy.The overlaying of detected horizontal edges and vertical edges enhances the text edges，the size restrict of edges helps to wipe off the non-text edges.Later，image projection is applied to get text regions.Eventually，the text regions are processed by OCR technology.The combination of these methods guarantees the performance of this algorithm.

Key words: Optical Character Recognition（OCR）, detection of text event, digital video

摘要： 为了在视频图像中进行字幕信息的实时提取，提出了一套简捷而有效的方法。首先进行文字事件检测，然后进行边缘检测、阈值计算和边缘尺寸限制，最后依据文字像素密度范围进一步滤去非文字区域的视频字幕，提出的叠加水平和垂直方向边缘的方法，加强了检测到的文字的边缘;对边缘进行尺寸限制过滤掉了不符合文字尺寸的边缘。应用投影法最终确定视频字幕所在区域。最后，利用OCR识别技术对提取出来的文字区域进行识别，完成视频中文字的提取。以上方法的结合保证了提出算法的正确率和鲁棒性。

关键词: 光学文字识别, 文字事件检测, 数字视频