J. Hwang | Semantic Scholar

Fast Fourier Transform - Algorithms and Applications

K. Rao, D. N. Kim, J. Hwang
Computer Science
6 October 2010

This book presents an introduction to the principles of the fast Fourier transform. This book covers FFTs, frequency domain filtering, and applications to video and audio signal processing. As fields…

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Techniques and Standards for Image, Video, and Audio Coding

K. Rao, J. Hwang
Computer Science
18 July 1996

International standards for image, video and audio coding, including ITU-T H.263 Very Low Bit-rate Coding, and MPEG-2 Generic Coding Algorithms are presented.

Computer Image Processing and Recognition

E. Hall, J. Hwang, F. Sadjadi
Computer Science
IEEE Transactions on Pattern Analysis and Machine…
28 May 1980

An introduction to the computer image processing and recognition techniques applied for accurately locating an object and some experimental examples are presented which illustrate some practical solutions to the problem.

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Matching of featured objects using relational tables from stereo images

J. Hwang, E. Hall
Computer Science, Mathematics
Comput. Graph. Image Process.
1 September 1982

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Block wavelet transform coding of images using classified vector quantization

Y. Huh, J. Hwang, K. R. Rao
Computer Science
IEEE Trans. Circuits Syst. Video Technol.
1 February 1995

A new coding scheme for image compression using classified two-channel conjugate vector quantization of the wavelet coefficients is proposed, which improves the encoding efficiency by taking advantage of the DWT and TCCVQ, which requires less computational complexity and less storage (memory).

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Classified wavelet transform coding of images using vector quantization

Y. Huh, J. Hwang, C. Choi, R. D. de Queiroz, K. R. Rao
Computer Science
Other Conferences
16 September 1994

A new image coding scheme--classified wavelet transform/vector quantization (DWT/CVQ)--is proposed to efficiently exploit correlation among different DWT layers aiming to improve its performance.

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Optimal variable quantization for JPEG extensions

J. Hwang, K. Yang
Computer Science
Proceedings of International Conference on…
7 June 1995

We present optimal variable quantization techniques for the newly proposed JPEG extensions from ISO/IEC 10918-3 (ITU-T Recommendation T.84). Variable quantization for each block is necessary to…

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Classified wavelet transform coding of images using two-channel conjugate vector quantization

Y. Huh, J. Hwang, K. R. Rao
Computer Science
Proceedings of 1st International Conference on…
13 November 1994

A new coding scheme for image compression using classified two-channel conjugate vector quantization (TC-CVQ) of the wavelet coefficients that exploits residual correlation among different layers of the discrete wavelet transform domain and improves the encoding efficiency.

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Surface Location In Scene Content Analysis

E. Hall, J. Tio, C. McPherson, J. Hwang
Computer Science
Optics & Photonics
7 December 1981

The purpose of this paper is to describe techniques and algorithms for the location in three dimensions of planar and curved object surfaces using a computer vision approach. Stereo imaging…

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Global Local Edge Coincidence Segmentation For Medical Images

J. Hwang, C. C. Lee, E. L. Hall
Computer Science
Optics & Photonics
26 December 1979

The technique has been applied to the location of suspected tumors in CT lung and brain images and demonstrates important additional capability which could be added to the software libraries of most CT systems.

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