Method of image feature coding and method of image search

Abstract

A feature coding unit extracts and encodes a feature of a video signal so as to generate a feature stream. A feature identifying unit checks a decoded feature obtained as a result of decoding the feature stream against a search key from a user for a match so that a video content requested by the user is retrieved.

1 . A method comprising:
 extracting segments of image areas from a source video;   coding the extracted segments;   generating a feature stream corresponding to the extracted segments;   decoding image features that are encoded in the feature stream; and   searching image frames in the source video based on the decoded image features.   
     
     
         2 . The method according to  claim 1 , wherein the feature stream and the source video are related to each other on the basis of a pointer. 
     
     
         3 . The method according to  claim 1 , wherein each of the segments define an attribute. 
     
     
         4 . The method according to  claim 3 , wherein the attribute includes a representative color, an on-screen position, a shape, a variation in position, a variation in brightness or color, and/or contrast. 
     
     
         5 . The method according to  claim 1 , wherein a user retrieves desired content from the source video on the basis of searching the generated feature stream. 
     
     
         6 . The method according to  claim 5 , wherein the source video is provided in a database or a transferable medium. 
     
     
         7 . The method according to  claim 6 , wherein the transferable medium includes a video tape.