Iconic indexing by 2-D strings
IEEE Transactions on Pattern Analysis and Machine Intelligence
International Journal of Computer Vision
Computational geometry in C
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ACM SIGMOD Record
Design and evaluation of algorithms for image retrieval by spatial similarity
ACM Transactions on Information Systems (TOIS)
Color matching for image retrieval
Pattern Recognition Letters
An integrated color-spatial approach to content-based image retrieval
Proceedings of the third ACM international conference on Multimedia
Shape measures for content based image retrieval: a comparison
Information Processing and Management: an International Journal
Managing multimedia information in database systems
Communications of the ACM
Content-based image retrieval using a composite color-shape approach
Information Processing and Management: an International Journal
Attributes of images in describing tasks
Information Processing and Management: an International Journal
Image Matching Using the OBIR System with Feature Point Histograms
VDB4 Proceedings of the IFIP TC2/WG 2.6 Fourth Working Conference on Visual Database Systems 4
Fast image retrieval using color-spatial information
The VLDB Journal — The International Journal on Very Large Data Bases
Image Indexing Using Color Correlograms
CVPR '97 Proceedings of the 1997 Conference on Computer Vision and Pattern Recognition (CVPR '97)
Integrated spatial and feature image query
Multimedia Systems
Histogram refinement for content-based image retrieval
WACV '96 Proceedings of the 3rd IEEE Workshop on Applications of Computer Vision (WACV '96)
Spatial similarity-based retrievals and image indexing by hierarchical decomposition
IDEAS '97 Proceedings of the 1997 International Symposium on Database Engineering & Applications
ICCV '98 Proceedings of the Sixth International Conference on Computer Vision
Bridging the semanitic gap in image retrieval
Distributed multimedia databases
Negotiating the Semantic Gap: From Feature Maps to Semantic Landscapes
SOFSEM '01 Proceedings of the 28th Conference on Current Trends in Theory and Practice of Informatics Piestany: Theory and Practice of Informatics
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As color plays an essential role in image composition, many color indexing techniques have been studied for content-based image retrieval. This paper examines the use of a computational geometry-based spatial color indexing methodology for effective and efficient image retrieval. In this scheme, an image is evenly divided into a number of M * N non-overlapping blocks, and each individual block is abstracted as a unique feature point labeled with its spatial location and dominant colors. For each set of feature points labeled with the identical color, we construct a Delaunay triangulation and then compute the feature point histogram by discretizing and counting the angles produced by this triangulation. The concatenation of all these feature point histograms serves as the image index, the so-called color anglogram. An important contribution of this work is to encode the spatial color information using geometric triangulation, which is rotation, translation, and scale invariant. We have compared the proposed approach with two of the best performing of recent spatial color indexing schemes, Color-WISE and the color correlogram approaches, respectively, at image block and pixel levels of different granularity. Various experimental results demonstrate the efficacy of our techniques.