MODIFIED MEDIAN FILTER WITH POST-FILTRATION DECISION MAKING

Abstract

Image processing becomes one of the most important areas of digital signal processing. Data of images is corrupted with noise in the process of capturing from the sensor and transmitting via various telecommunication channels. Every year, the quality and among of images data increases. Thus, requirements of processing speed of digital image filters goes up. Adaptive filters based on the median filter have become widespread. They achieve high filtering quality for various types and levels of noise. Such filters often contain complex algorithms for detecting noisy pixels, which significantly reduce number of frames processed per second. In the given article proposed an algorithm of the filter with making decision of pixel noisiness after the filtering procedure, which achieves high filtration quality and speed. In the structure of the filter, there are no complicated in terms of computational load operations, which allows to implement its optimized version for the current popular system on the crystal, FPGAs and processors with vector arithmetic. Further interest is the study of the filter with other types of noise, as well as the study of the effect of changing the aperture of the filter.