HW/SW Design-Based Implementation of Vector Median Rational Hybrid Filter

A new code sign implementation of vector median rational hybrid filter based on efficient hardware/softwareimplementation is introduced and applied to colour image filtering problems. This filter is used essentially to removeimpulsive and Gaussian noise in colour images. In our design we start by implementing the software solution in system onprogrammable chip context using NIOS-II softcore processor and )Clinux as operating system. We evaluate the executiontime of the whole filtering process. Than we add a hardware accelerator part. This latter is implemented using fast parallelarchitecture. Compared to the software solution results, the use of the hardware accelerator improves clearly the filteringspeed and maintains the good filtering quality as shown by simulations