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Session 1532

Implementation of Wavelet Decomposition and Reconstruction for an Image using TMS320C6701

Chung S. Leung, Sunil Kulkarni

Electrical Engineering Department Texas A&M University-Kingsville Kingsville, Texas 78363

Abstract

The discrete wavelet transform provides sufficient information both for analysis and synthesis of the original image with a significant reduction in the computation time. There are two approaches for working on the above algorithm, one being by using two dimensional filters and the other one by using separable transforms that can be implemented using one-dimensional filter on the rows first and then on the columns. In this research, we have implemented wavelet decomposition and reconstruction using one-dimensional transform applied on the rows first and then the columns. For an N×M image size, we filter each row and then columns with the analysis pair of low-pass and high-pass filters and down sample successively to obtain four bands after decomposition. Later during image reconstruction, we up sample and filter each column and then rows with pair of synthesis low pass and high pass filters to obtain the original image size. This algorithm has been implemented in real-time by using the floating-point processor TMS320C6701 chip manufactured by Texas Instruments (TI) that is widely used for image processing applications. The wavelet transform has become the most powerful tool for still image analysis. Yet there are many parameters within a wavelet analysis and synthesis that govern the quality of the image. In this paper, we discuss the wavelet decomposition and reconstruction strategies for a two-dimensional signal and their implications on the reconstruction of the image. A pool of grey scale image has been wavelet transformed using a set of bi-orthogonal filters (wavelet filter bank) that undergoes the decomposition and reconstruction process.

Introduction

The dyadic and wavelet transform is originally defined only for one-dimensional signals. The application of wavelet transform to still image offers different possibilities to decompose a signal. In this paper, we investigate the effects of a non-standard method used for the decomposition and reconstruction of the image. An empirical evaluation of each coding performance on grey-scale images focuses on the visual quality. Yet there are many parameters

Proceeding of the 2004 American Society for Engineering Education Annual Conference & Exposition Copyright  2004, American society for Engineering Education

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Kulkarni, S., & Leung, C. (2004, June), Implementation Of Wavelet Decomposition And Reconstruction For An Image Using Tms320 C6701 Paper presented at 2004 Annual Conference, Salt Lake City, Utah. 10.18260/1-2--13381