Title:
ビデオフレームの分類方法及びセグメント化方法、及びコンピュータ可読記憶媒体
Document Type and Number:
Japanese Patent JP4258090
Kind Code:
B2
Abstract:
Techniques for classifying video frames using statistical models of transform coefficients are disclosed. After optionally being decimated in time and space, image frames are transformed using a discrete cosine transform or Hadamard transform. The methods disclosed model image composition and operate on grayscale images. The resulting transform matrices are reduced using truncation, principal component analysis, or linear discriminant analysis to produce feature vectors. Feature vectors of training images for image classes are used to compute image class statistical models. Once image class statistical models are derived, individual frames are classified by the maximum likelihood resulting from the image class statistical models. Thus, the probabilities that a feature vector derived from a frame would be produced from each of the image class statistical models are computed. The frame is classified into the image class corresponding to the image class statistical model which produced the highest probability for the feature vector derived from the frame. Optionally, frame sequence information is taken into account by applying a hidden Markov model to represent image class transitions from the previous frame to the current frame. After computing all class probabilities for all frames in the video or sequence of frames using the image class statistical models and the image class transition probabilities, the final class is selected as having the maximum likelihood. Previous frames are selected in reverse order based upon their likelihood given determined current states.
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Inventors:
Jonathan Tea. Foot
Lindy Wilcox
Andreas Gargen Shawn
Lindy Wilcox
Andreas Gargen Shawn
Application Number:
JP2000065042A
Publication Date:
April 30, 2009
Filing Date:
March 09, 2000
Export Citation:
Assignee:
Fuji Xerox Co., Ltd
International Classes:
G06F17/30; G06T7/00; H04N5/76; G06V10/764; G10L15/10; G10L15/14; H04N7/15; H04N7/30
Other References:
杉山善明、外1名,多重部分空間法に基づくテレビスポーツニュース映像の自動分類,電子情報通信学会論文誌,日本,社団法人電子情報通信学会,1998年 9月25日,第J81-D-II巻,第9号,p.2112-2119
波多野賢治、外2名,多段階自己組織化マップによるビデオ映像記述支援と類似シーン検索,情報処理学会論文誌,日本,社団法人情報処理学会,1998年 4月15日,第39巻,第4号,p.933-942
波多野賢治、外2名,多段階自己組織化マップによるビデオ映像記述支援と類似シーン検索,情報処理学会論文誌,日本,社団法人情報処理学会,1998年 4月15日,第39巻,第4号,p.933-942
Attorney, Agent or Firm:
Atsushi Nakajima
Kato Kazunori
Kato Kazunori