TECHNOLOGY Hardware and Software Implementation of Median Filter in Image Processing Application
Parinita Walivadekar, Dattatraya Shankar Bormane, Rajarshi Shahu · 2013
Image can be contaminated in the process of collect ion, processing and transmission. That’s why image denoising is important part of Image Processing. The existence of Impulse noise in an acquired image is most common problem. Median filter has ability to remove Impuls e noise and preserve edges of an image. It is a com putationally intensive operation, so processing time of median f ilter software algorithm is considerably more. Ther efore, to meet the real-time filtering requirements, fast hardware based Median filter is used. In this work, median filter is implemented on FPGA and filter quality in terms of Signal-to-noise ratio is measured for several 256 x 256 color (RGB) images.