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Research of Various Feature-Based Image Retrieval in News Photo-Database

Author: QiuYang
Tutor: ChenZuo
School: Wuhan University
Course: Applied Computer Technology
Keywords: News Photo Gallery Image Retrieval Integrated features Relevance feedback
CLC: TP391.41
Type: Master's thesis
Year: 2004
Downloads: 161
Quote: 2
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Abstract


News Photo Gallery frequently encountered picture before storage check weight and find a group of similar pictures involving operation of image similarity judgments . The image similarity judgment requires a combination of visual perception of the picture information , such as pictures of color, composition , and so on . However , the characteristics of these visual perception is difficult to describe in words , and text descriptions by subjective factors caused by processing and query different description retrieve contradiction . Keyword search for text Similar Image Retrieval of low efficiency , poor results , we have developed a retrieval system based on image features to achieve the objective in the news photo library to retrieve similar images . Currently, more mature content - based image retrieval technology is mainly concentrated in the low-level features of the image such as color , texture , and color histogram , contrast , roughness , directionality efficient feature descriptors . The system combines news photo composition characteristics of the picture is divided into different weight four regions , integrated use of HIS color model color histogram and the MPEG-7 standard recommended color layout descriptor (CLD) and edge histogram descriptor ( EHD), respectively, of the image corresponding feature extraction , and normalization process . Proposed a relevance feedback method, based on the evaluation of the users of the search results , to access photo news text description of the main objective , the retrieval results closer to the user goals . Tests show that the image library contains 1000 photo , the system has better retrieval effect .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
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