그림 1. (a) 원 영상과 (b) 8×8 DCT 변환 결과 Fig. 1. Original image and 8×8 DCT result Image : (a) Original Image, (b) Its DCT result.
그림 2. 제안된 방법을 통하여 생성된 DCT 필터뱅크. Fig. 2. DCT Filter-Bank for the proposed method.
그림 3. DCT 필터뱅크에서 추출된 AC계수의 방향정보 Fig. 3. Orientation information of extracted AC Coefficient from the DCT filter-bank.
그림 6. 투영 히스토그램 생성 과정 Fig. 6. Computation of the projection histogram.
그림 7. 제안된 알고리즘 블록도 Fig. 7. Block diagram of the proposed method.
그림 9. 실험에 사용된 영상 데이터베이스 Fig. 9. Database images for experiments.
그림 10. 공룡 영상에 대한 검색성능 Fig. 10. Retrieval performance about dinosaur images.
그림 11. 꽃 영상에 대한 검색성능 Fig. 11.Retrieval performance about flower images.
그림 12. 말 영상에 대한 검색성능 Fig. 12. Retrieval performance about horse images.
그림 4. 제안된 방법을 위한 DCT 필터뱅크 생성 과정 Fig. 4. DCT filter-bank extraction for the proposed method.
그림 5. (a) 원 영상에 대한 히스토그램, (b) DC성분에 대한 히스토그램, (c) DC성분에 대한 64 level 양자화 수행 후의 히스토그램 Fig. 5. (a) Histograms of original image, (b) Histograms of DC components (c) Histograms of DC components quantized by the level 64.
그림 8. 실험에 이용된 영상 검색 시스템 Fig. 8. Retrieval System.
표 1. 검색을 위한 특징벡터 빈 Table 1. Bins of feature vector for retrieval.
표 2. 데이터베이스 분류 Table 2. Database classification.
표 3. 제안된 검색방법과 기존의 색상검색에 대한 평균 정확도(공룡) Table 3. Average Precision about proposed method and retrieval using color method(dinosaur).
표 4. 제안된 검색방법과 기존의 색상검색에 대한 평균정확도 (꽃) Table 4. Average Precision about proposed method and retrieval using color method(flower).
표 5. 제안된 검색방법과 기존의 색상검색에 대한 평균정확도(말) Table 5. Average Precision about proposed method and retrieval using color method(horse).
References
- Y. Rui and T. S. Huang, "Image Retrieval Current Techniques, Promising, Directions and OpenIssues", Journal of Computer Visual Communication and Image Representation, Vol.10, pp39-62, 1999. https://doi.org/10.1006/jvci.1999.0413
- M. Ortega, Y. Rui, K. Chakrabarti, S. Mehratra, and T. S.. Huang, "Supporting similarity queries in MARS," IEEE Transactions on Pattern Analysis and Machine Intelligence, pp403-413, 1997.
- J. Z. Wang, J. Li, and G. Wiederhold, "SIMPLIcity : Semantics-Sensitive Integrated Matching for Picture Libraries," IEEE Transactions in Pattern Analysis and Machine Intelligence, Vol.23, No.9, pp947-963, 1996.
- J. R. Smith and S. -F. Chang, "Visual SEEK : A fully automated content-based image query system," Proceedings of the fourth ACM International conference on Multimedia, pp87-98, 1996.
- C. Carson, M. Thomas, S. Belongie, J. M. Hellerstein, and J. Malik, "Blodworld : A System for region-based image indexing and retrieval," Lectur note on computer science, Vol.1614, pp509-516, 1999.
- IBM Almaden Research Center, "Query by image and video content : The QBIC system," IEEE Transaction On Multimedia, Vol.28, No.9, pp23-32, 1995.
- P. W. Niblack, R. Barber and et al, "The QBIC Project : Querying Images by Content using Color, Texture and Shape," Proceedings. SPIE storange and Retrieval for Image and Video Database, pp124-128, 1996.
- M. J. Swain, D. H. Ballard, "Color Indexing," International Journal of Computer Vision, Vol.7, No.1, 1991.
- G. Pass, R. Zabih and J. Miller, "Comparing Image using Color Coherence Vector," Proceedings of 4th ACM International Conference Multimedia, pp65-73, 1996
- G. Pass and R. Zabih, "Histogram refinerment for content based image retrieval," IEEE workshop on Applications of Computer Vision, pp96-102, 1996.
- M. J. Swain, D. H. Ballard, "Color Indexing", International Journal of Computer Vision, Vol.7, No.1, pp.11-32, 1991. https://doi.org/10.1007/BF00130487
- J. Huang, S. R. Kumar, M. Mitra, W. J. Zhu and R. Zabih, "Image Indexing using Color Correlograms," IEEE Computer Society Conference on Computer Vision and Pattern Recognition, pp762-768, 1997.
- J. Huang, S. R. Kumar, M. Mitra, W. J. Zhu and R. Zabih, "Spatial color indexing and applications," Proceedings Sixth International Conference on Computer Vision, pp602-607, 1998.
- G. C. Feng and J. Jiang, "Image extraction in DCT domain," IEEE Proceedings Visual Image and Signal Processing, Vol.50, No.1, pp20-27, 2003.
- Z.-M. Lu and H. Burkhardt, "Colour image retrieval based on DCT-domain vector quantization index histograms", ELECTRONICS LETTERS, Vol. 41, No.17, 2005.
- C. W. Ngo, T. C. Pong, R. T. Chin, "Exploiting image indexing tech-niques in DCT domain," Pattern Recognition 34, pp1841-1851, 2001. https://doi.org/10.1016/S0031-3203(00)00111-4
- T. Tsai, Y.-P. Huang and T.-W. Chiang, "Dominant feature extraction in block-DCT domain," Proceedings of IEEE International conference on Systems, Man & Cybernetics, Taipei, Taiwan, pp3623-3628, 2006.
- N. Otsu, "A Threshold Selection Method from Gray-Level Histogram," IEEE Transactions on System, Man & Cybernetics, SMC-9, pp62-66, 1979. https://doi.org/10.1109/TSMC.1979.4310076
- James Z. Wang's Research Group, http://Wang.ist.psu.edu/