嗨,大伙好,春节过的怎么样?久久又和大伙见面了,真好!3月6号为了配合Intel PⅢ处理器的全球发布,上海梅龙镇广场和百脑汇联合在全市搞了个Intel带你进入精彩世界的促销活动。国内诸多知名厂商(联想、东海、海信等)纷纷带来了他们的最新...嗨,大伙好,春节过的怎么样?久久又和大伙见面了,真好!3月6号为了配合Intel PⅢ处理器的全球发布,上海梅龙镇广场和百脑汇联合在全市搞了个Intel带你进入精彩世界的促销活动。国内诸多知名厂商(联想、东海、海信等)纷纷带来了他们的最新力作,去看的朋友不知你注意了没有,采用SSE(Katmai New Instruction)指令集的PⅢ在RUN极品飞车时。展开更多
The visual background extractor(Vibe)algorithm can lead to a large area of false detection in the extracted foreground target when the illumination is mutated.An improved Vibe method based on the YCbCr color space and...The visual background extractor(Vibe)algorithm can lead to a large area of false detection in the extracted foreground target when the illumination is mutated.An improved Vibe method based on the YCbCr color space and improved three-frame difference is proposed in this paper.The algorithm detects the illumination mutation frames accurately based on the difference between the luminance components of two frames adjacent to a video frame.If there exists a foreground moving target in the previous frame of the mutated frame,three-frame difference method is utilized;otherwise,Vibe method using current frame is used to initialize background.Improved three-frame differential method based on the difference in brightness between two frames of the video changes the size of the threshold adaptively to reduce the interference of noise on the foreground extraction.Experiment results show that the improved Vibe algorithm can not only suppress the“ghost”phenomenon effectively but also improve the accuracy and completeness of target detection,as well as reduce error rate of detection when the illumination is mutated.展开更多
Pornographic image/video recognition plays a vital role in network information surveillance and management. In this paper, its key techniques, such as skin detection, key frame extraction, and classifier design, etc.,...Pornographic image/video recognition plays a vital role in network information surveillance and management. In this paper, its key techniques, such as skin detection, key frame extraction, and classifier design, etc., are studied in compressed domain. A skin detection method based on data-mining in compressed domain is proposed firstly and achieves the higher detection accuracy as well as higher speed. Then, a cascade scheme of pornographic image recognition based on selective decision tree ensemble is proposed in order to improve both the speed and accuracy of recognition. A pornographic video oriented key frame extraction solution in compressed domain and an approach of pornographic video recognition are discussed respectively in the end.展开更多
文摘嗨,大伙好,春节过的怎么样?久久又和大伙见面了,真好!3月6号为了配合Intel PⅢ处理器的全球发布,上海梅龙镇广场和百脑汇联合在全市搞了个Intel带你进入精彩世界的促销活动。国内诸多知名厂商(联想、东海、海信等)纷纷带来了他们的最新力作,去看的朋友不知你注意了没有,采用SSE(Katmai New Instruction)指令集的PⅢ在RUN极品飞车时。
基金National Natural Science Foundation of China(No.61761027)。
文摘The visual background extractor(Vibe)algorithm can lead to a large area of false detection in the extracted foreground target when the illumination is mutated.An improved Vibe method based on the YCbCr color space and improved three-frame difference is proposed in this paper.The algorithm detects the illumination mutation frames accurately based on the difference between the luminance components of two frames adjacent to a video frame.If there exists a foreground moving target in the previous frame of the mutated frame,three-frame difference method is utilized;otherwise,Vibe method using current frame is used to initialize background.Improved three-frame differential method based on the difference in brightness between two frames of the video changes the size of the threshold adaptively to reduce the interference of noise on the foreground extraction.Experiment results show that the improved Vibe algorithm can not only suppress the“ghost”phenomenon effectively but also improve the accuracy and completeness of target detection,as well as reduce error rate of detection when the illumination is mutated.
基金Supported by the National Natural Science Foundation of China (No.60772069)863 High-Tech Project (2008AA01A313)
文摘Pornographic image/video recognition plays a vital role in network information surveillance and management. In this paper, its key techniques, such as skin detection, key frame extraction, and classifier design, etc., are studied in compressed domain. A skin detection method based on data-mining in compressed domain is proposed firstly and achieves the higher detection accuracy as well as higher speed. Then, a cascade scheme of pornographic image recognition based on selective decision tree ensemble is proposed in order to improve both the speed and accuracy of recognition. A pornographic video oriented key frame extraction solution in compressed domain and an approach of pornographic video recognition are discussed respectively in the end.
