id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
ap-1306	Blažek, M.; Anisimova, E.; Páta, P.	Application of Wavelet Transform for Image Denoising of Spatially and Time Variable Astronomical Imaging Systems	2011	5	.pdf	application/pdf	2274	86	59	For the third decomposition level, the influence of the denoising on the astronomical image was even nega- tive for several wavelets (e.g. most of the Daubechies and Reversed Biorthogonal wavelets) because of the strong artifacts of the transform (Figure 4). Only soft thresholding [9] was ap- plied, due to its better peak signal to noise ratio for image denoising, and no thresholding was done to 1http://www.mathworks.com/ 2http://iraf.noao.edu/ 12 Acta Polytechnica Vol. 51	cache/ap-1306.pdf	txt/ap-1306.txt