Browsing by Author "Zelensky, Alexander"

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    Comparative analysis of blind methods for additive noise variance evaluation in images
    (Видавництво Львівської політехніки, 2012) Abramova, Victoriya; Abramov, Sergey; Lukin, Vladimir; Zelensky, Alexander
    The comparative analysis for three blind methods for additive noise variance evaluation in images is carried out. Cases of spatially uncorrelated and correlated noise are considered.
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    Speeding up DCT-based filtering of images
    (Видавництво Львівської політехніки, 2010) Fevralev, Dmitriy; Lukin, Vladimir; Krivenko, Sergey; Zelensky, Alexander; Egiazarian, Karen
    This paper addresses an issue of proper parameter selection for a fast DCT-based image filtering in non-overlapping or partially overlapping blocks. Images processed with different parameter sets are compared to each other for a set of test images in terms of standard criteria (output MSE) and visual quality measures (PSNR-HVS-M and MSSIM). Comparison to other fast filters is done as well. Advantages of the proposed methods for fast denoising are demonstrated.