Open Journal Systems

Wavelet transform based image enhancement: A noise reduction approach

Koteswararao Mallaparapu, Kota Venkata Ramarao

Article ID: 2321
Vol 1, Issue 1, 2023

DOI: https://doi.org/10.54517/cte.v1i1.2321
VIEWS - 97 (Abstract)

Abstract

This paper introduces a new thresholding function that mixes the soft thresholding functions and Smoothly Clipped Absolute Deviation (SCAD) for denoising images using the decimated wavelet transform technique, which is widely popular in various applications. The proposed method is applied to denoise noisy images contaminated with additive white Gaussian noise, employing the Top rule. The efficiency of this new thresholding function is also evaluated within the context of the Translation Invariant method. The results are compared with existing methods such as SCAD, soft thresholding, and the Wiener filter-based denoising approach. Parameters such as Root Mean Square Error (RMSE) and Peak Signal Noise Ratio (PSNR) are employed to assess the quality of denoising.

Keywords

WT; DWT; image denoising; new thresholding function; top rule; wiener filter; translation invariant method

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