Image Denoise based on Undecimated Wavelet Transform: A Comparative Analysis

Israa Hashim Latif

doi:10.30572/2018/KJE/160317

Authors

Israa Hashim Latif Department of Computer Engineering, College of Engineering, Al-Nahrain University, Baghdad, Iraq https://orcid.org/0000-0001-9312-3859

DOI:

https://doi.org/10.30572/2018/KJE/160317

Keywords:

Image denoising, undecimated wavelet transforms, thresholding techniques, LabVIEW

Abstract

Image denoising is a key challenge in the field of image processing, focusing on eliminating undesirable noise while maintaining essential features like edges and textures. This research comparatively analyzed various methods of the Undecimated Wavelet Transform (UWT) for achieving image denoising. The initial section examined the performance of Mean Squared Error (MSE) and Root Mean Squared Error (RMSE) utilizing MATLAB, indicating that biorthogonal wavelets provide optimal noise reduction with minimal degradation of detail. The subsequent section investigated various thresholding techniques, specifically SURE, Hybrid, and Universal by calculating their processing times evaluated over four levels of decomposition in LabVIEW. Results demonstrated that SURE exhibits the longest computational duration, particularly at elevated levels of decomposition, whereas the Hybrid approach offered a favorable balance between performance and processing time. Conversely, the Universal thresholding method is identified as the most expedient, proving to be the most efficient at greater levels of wavelet decomposition

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