Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: A Robust Color Object Analysis Approach to Efficient Image Retrieval | EURASIP Journal on Applied Signal Processing 2004 6 871-885 2004 Hindawi Publishing Corporation A Robust Color Object Analysis Approach to Efficient Image Retrieval Ruofei Zhang Department of Computer Science State University of New York Binghamton NY 13902 USA Email rzhang@ Zhongfei Mark Zhang Department of Computer Science State University of New York Binghamton NY 13902 USA Email zhongfei@ Received 20 December 2002 Revised 1 December 2003 We describe a novel indexing and retrieval methodology integrating color texture and shape information for content-based image retrieval in image databases. This methodology we call CLEAR applies unsupervised image segmentation to partition an image into a set of objects. Fuzzy color histogram fuzzy texture and fuzzy shape properties of each object are then calculated to be its signature. The fuzzification procedures effectively resolve the recognition uncertainty stemming from color quantization and human perception of colors. At the same time the fuzzy scheme incorporates segmentation-related uncertainties into the retrieval algorithm. An adaptive and effective measure for the overall similarity between images is developed by integrating properties of all the objects in every image. In an effort to further improve the retrieval efficiency a secondary clustering technique is developed and employed which significantly saves query processing time without compromising retrieval precision. A prototypical system of CLEAR we developed demonstrated the promising retrieval performance and robustness in color variations and segmentation-related uncertainties for a test database containing 10 000 general-purpose color images as compared with its peer systems in the literature. Keywords and phrases content-based image retrieval fuzzy logic region-based features object analysis clustering efficiency. 1. INTRODUCTION The dramatic improvements in hardware technology have made it possible in the last few years
