Thresholding Techniques for Image Denoising and Their Comparison by Different Wavelets
Malati Mazumder, Md. Shahadat Hossain, Md. Asaduzzaman, Md. Rafiqul Islam
Current Journal of Applied Science and Technology · pp. 1–15 · Published 24 Aug 2018
10.9734/CJAST/2018/42217Abstract
Though the digital images are considered as the medium of transmitting visual information and crucial technique of modern communication, the obtained images sometimes may be corrupted by unexpected noise. However, these noisy images require further processing, which involves the manipulation of the image data to produce a visually high-quality image. In this paper, several thresholding techniques, namely SureShrink, VisuShrink and BayeShrink have been presented and the suitable one is determined. In addition, various noise models, for instance, Gaussian noise, salt and pepper noise and speckle noise, along with additive and multiplicative types have been utilized. The selection of the denoising algorithm being application dependent, it is crucial to have proper knowledge regarding the noise in each image for the purpose of selecting the appropriate algorithm. Typically, the wavelet-based approach finds applications in denoising images corrupted with Gaussian noise. Here the mean square error of the images has been determined as a quantitative measure.
References (15)
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