文档介绍：武汉理工大学硕士学位论文 Abstract With therapiddevelopment ofmultimedia work technology,multimedia had been widely applied inmany fields,such mon information, advertisement,education,medicine,business and spread of digital video had e more and more Television、multimedia broadcasting、video conference had entered intothedally lifcstepbystep andvideo had e one ofthemainstream c刁trlrierofinformation problem people how to fend the needing content quickly and are so much videoinformation;not the short of video thesisanalyses theexisting frame ofvideo retrievaland studies thekey technologies ofthevideo retrievalsystem based onthe tcxtcharacteL TlIiSthesisdotheresearch asbelow: (1)Realizing theplaying ofthevideo and thecapture ofthevideo frame using theDirectShow technology: (2)Discussing the principle and main algorithms ofthe shot segmentation; introduce themainstream algorithms of the Pixeldifferences method and theColor Histogram—based method;studying themethod oftheMutual Information;realizing thesemethods withVC++and pare ofthesemethods; (3)Researching theprinciple and main algorithms ofthekey frame extraction technology;do theresearchofthekey frame extraction technology based OU the Mutual Information; (4)Analyzing thecharacteristic ofthe textand textinthevideostream;take the basketball video realize themethod ofthe textrecognition. 11listhesisprogram thefriendly interface with theWindows XP operating tooloftheDirectX andlanguage oftheVisual C++ to realize the video playing,video frame capture and the algorithms ofthe shot segmentation andthekey using theprofessional OCR software torealize the textrecognition. Business Video Retrieval System is ahuge project and needs great boundary detection andkeyframe extraction are thekeytechnologies thesisdothemain research ofthese a