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    • 2. 发明授权
    • Picture searching apparatus
    • 图像搜索装置
    • US07916793B2
    • 2011-03-29
    • US10641025
    • 2003-08-15
    • Yasuyuki NakajimaMasaru SuganoHiromasa Yanagihara
    • Yasuyuki NakajimaMasaru SuganoHiromasa Yanagihara
    • H04N7/18
    • H04N5/147
    • The picture input section 12 fetches image data from the storage device 11, and then, inputs image data on sequential n images into the section 13 for measuring correlation between sequential images and the section 14 for measuring correlation between sampled images. The section 13 for measuring correlation between sequential images measures the correlation between sequential images based on video data. The section 14 for measuring correlation between sampled images measures the correlation between sub-sampled images. The short shot determining section 15 determines short cut points by using the correlation between the sequential images and the correlation between the sub-sampled images. Otherwise, short cut points may be determined in consideration of motion amount between the sequential images or the sub-sampled images.
    • 图像输入部分12从存储装置11获取图像数据,然后将顺序n图像上的图像数据输入到用于测量顺序图像之间的相关性的部分13和用于测量采样图像之间的相关性的部分14。 用于测量连续图像之间的相关性的部分13测量基于视频数据的连续图像之间的相关性。 用于测量采样图像之间的相关性的部分14测量子采样图像之间的相关性。 短拍判定部15通过使用顺序图像之间的相关性和子采样图像之间的相关性来确定快捷点。 否则,可以考虑顺序图像或次采样图像之间的运动量来确定快捷点。
    • 7. 发明授权
    • Scene change detector
    • 场景变化检测器
    • US06473459B1
    • 2002-10-29
    • US09255965
    • 1999-02-23
    • Masaru SuganoYasuyuki NakajimaHiromasa YanagiharaAkio Yoneyama
    • Masaru SuganoYasuyuki NakajimaHiromasa YanagiharaAkio Yoneyama
    • H04B166
    • H04N19/87H04N19/142H04N19/179H04N19/46H04N19/503H04N19/85
    • A coding parameter extracting unit extracts predictive-coded mode information, motion vectors, and coded transformed coefficients from video-signal-demultiplexed information. An abrupt scene change judging unit uses a characteristic that scenes change greatly before and after an abrupt scene change, to classify blocks on the basis of the predictive-coded mode information among the compressed moving picture data, so that an abrupt scene change is detected. A special effect judging unit detects dissolve from motion characteristic values calculated from the values of motion vectors, predictive-coded picture characteristic values derived from coefficients on frequency domains in blocks, and the number of blocks each having a motion vector that is larger than a threshold; and detects wipe by motion characteristic values calculated from the values of motion vectors, and predictive-coded picture characteristic values derived from coefficients on frequency domains in blocks. According to this architecture, scene changes including special effects such as dissolve or wipe can be detected at high speed and high accuracy by a processing which is far less than that of the prior art.
    • 编码参数提取单元从视频信号解复用信息中提取预测编码模式信息,运动矢量和编码变换系数。 突发场景变化判断单元使用在突然场景变化之前和之后剧烈变化的特征,根据压缩的运动图像数据中的预测编码模式信息对块进行分类,从而检测到突然的场景变化。 特殊效果判断单元从运动矢量的值,从块中的频域上的系数导出的预测编码图像特征值和每个具有大于阈值的运动矢量的块的数量来检测从运动特征值的溶解 ; 并且通过从运动矢量的值计算的运动特性值和从块中的频域上的系数导出的预测编码图像特征值来检测擦除。 根据该结构,可以通过远远小于现有技术的处理,以高速和高精度检测包括诸如溶解或擦拭的特殊效果的场景变化。