In this paper, we propose a novel design of content access and extraction algorithm for compressed image browsing and indexing, which is critical for all visual information systems. By analyzing the relationship between DCT coe3cients of one block of 8 × 8 pixels and its four sub-blocks of 4 × 4 pixels, the proposed algorithm extract an approximated image with smaller size for indexing and cont...

We describe the Image Tagger system – a web-based tool for supporting collaborative image indexing by students. The tool has been used in three successive graduate-level classes on content representation. To fully satisfy the class’ requirements and provide support for student indexing activities, it was designed and developed iteratively in accordance with the feedback and suggestions from the...

With the rapid increase of the volume of digital image collections, effective concept-based image retrieval has been became an important research issue. The effectiveness of image retrieval depends on meaningful indexing. In this paper, we propose an extension of image indexing models which utilizes a knowledge framework with adaptive segmentation of HSV color space. Experiments have been perfo...

Color is a feature of the great majority of content-based image retrieval systems. However the robustness, effectiveness, and efficiency of its use in image indexing are still open issues. This paper provides a comprehensive survey of the methods for color image indexing and retrieval described in the literature. In particular, image preprocessing, the features used to represent color informati...

We describe the Image Tagger system – a web-based tool for supporting collaborative image indexing in a classroom environment. The tool has been used in three successive graduatelevel classes on Content Representation at Drexel University, Philadelphia. To fully satisfy the class’ requirements and provide support for student indexing activities, it was designed and developed iteratively in acco...

Scene Structural matrices (SSMs) are 2-D tables that can be used conveniently to capture the organization of a scene in a color image when it has been adaptively partitioned and represented by a bintree. In this paper, we present a number of methods to populate the cells of SSMs. Well-established and popular image indexing features are used. Because the SSMs implicitly contain scene organizatio...