스마트 센서와 시각적 기술자를 결합한 사진 검색 시스템

Photo Retrieval System using Combination of Smart Sensor and Visual Descriptor

  • 이용환 (극동대학교 스마트모바일학과) ;
  • 김흥준 (경남과학기술대학교 컴퓨터공학과)
  • Lee, Yong-Hwan (Department of Smart Mobile, Far East University) ;
  • Kim, Heung-Jun (Department of Computer Engineering, Gyeongnam National University of Science and Technology)
  • 투고 : 2014.06.02
  • 심사 : 2014.06.20
  • 발행 : 2014.06.30

초록

This paper proposes an efficient photo retrieval system that automatically indexes for searching of relevant images, using a combination of geo-coded information, direction/location of image capture device and content-based visual features. A photo image is labeled with its GPS (Global Positioning System) coordinates and direction of the camera view at the moment of capture, and the label leads to generate a geo-spatial index with three core elements of latitude, longitude and viewing direction. Then, content-based visual features are extracted and combined with the geo-spatial information, for indexing and retrieving the photo images. For user's querying process, the proposed method adopts two steps as a progressive approach, filtering the relevant subset prior to use a content-based ranking function. To evaluate the performance of the proposed scheme, we assess the simulation performance in terms of average precision and F-score, using a natural photo collection. Comparing the proposed approach to retrieve using only visual features, an improvement of 20.8% was observed. The experimental results show that the proposed method exhibited a significant enhancement of around 7.2% in retrieval effectiveness, compared to previous work. These results reveal that a combination of context and content analysis is markedly more efficient and meaningful that using only visual feature for image search.

키워드

참고문헌

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