%0 Journal Article %T About one method of low-speed filtration of sonar images %A Popov George Aleksandrovich %A Khrayshchev Denis Aleksandrovich %J Vestnik of Astrakhan State Technical University. Series: Marine Engineering and Technologies %D 2010 %I Astrakhan State Technical University %X A low-speed filter of digital images which uses a new function for com-pression arraying is offered. The proposed filter's algorithm consists of two stag-es. On the first stage 5 ¡Á 5 window is moved on the image so that every pixel gets in the center of the window once and the 8 adjacent pixels' brightness levels are calculated. On the second stage the central pixel's brightness level is calculated using the new brightness levels of the 8 adjacent pixels. At the same time only the central pixel changes its brightness on the image. The comparison of the pro-posed filter with well-known Gaussian filter has been made by means of PSNR noise pollution criterion and brightness histogram. It is shown that ac-cording to the PSNR criterion the proposed filter virtually isn¡¯t inferior to Gauss-ian filter: images processed with the proposed filter have a wider brightness level spectrum. %K sonar images processing %K low-speed filters %K Gaussian filter %K digital image improvement %K preliminary processing %K noise suppression %K digital image analysis. %U http://astu.org/content/userimages/file/sea_1_2010/11.pdf