Dr. Soo Hyun Bae Profile

Dr. Soo Hyun Bae

Sr Research Engineer at Sony Corp of America

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Area of Expertise:

Computer Vision , Image Processing , Image Retrieval , Pattern Recognition

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Publications (1)

Proceedings Article | 10 February 2009 Paper

Parsed and fixed block representations of visual information for image retrieval

Soo Hyun Bae, Biing-Hwang Juang

Proceedings Volume 7240, 724017 (2009) https://doi.org/10.1117/12.811572

KEYWORDS: Visualization, Image retrieval, Information visualization, Image compression, Distortion, Associative arrays, Databases, Visual analytics, Quantization, Image segmentation

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The theory of linguistics teaches us the existence of a hierarchical structure in linguistic expressions, from letter to word root, and on to word and sentences. By applying syntax and semantics beyond words, one can further recognize the grammatical relationship between among words and the meaning of a sequence of words. This layered view of a spoken language is useful for effective analysis and automated processing. Thus, it is interesting to ask if a similar hierarchy of representation of visual information does exist. A class of techniques that have a similar nature to the linguistic parsing is found in the Lempel-Ziv incremental parsing scheme. Based on a new class of multidimensional incremental parsing algorithms extended from the Lempel-Ziv incremental parsing, a new framework for image retrieval, which takes advantage of the source characterization property of the incremental parsing algorithm, was proposed recently. With the incremental parsing technique, a given image is decomposed into a number of patches, called a parsed representation. This representation can be thought of as a morphological interface between elementary pixel and a higher level representation. In this work, we examine the properties of two-dimensional parsed representation in the context of imagery information retrieval and in contrast to vector quantization; i.e. fixed square-block representations and minimum average distortion criteria. We implemented four image retrieval systems for the comparative study; three, called IPSILON image retrieval systems, use parsed representation with different perceptual distortion thresholds and one uses the convectional vector quantization for visual pattern analysis. We observe that different perceptual distortion in visual pattern matching does not have serious effects on the retrieval precision although allowing looser perceptual thresholds in image compression result poor reconstruction fidelity. We compare the effectiveness of the use of the parsed representations, as constructed under the latent semantic analysis (LSA) paradigm so as to investigate their varying capabilities in capturing semantic concepts. The result clearly demonstrates the superiority of the parsed representation.

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