FPGA implementation of vector directional distance filter

In this paper, we present a fast implementation of the vector directional distance filter (VDDF) for noise suppression and fine-details preservation in color image, based on FPGA hardware/software (HW/SW) environment. For the ease of implementation, we have proposed some approximations. An efficient hardware implementation is developed to acquire best execution time. After validation, using NiosII development board, we demonstrate a clearly improvement in the filtering speed compared to the software solution. Experiments on a large and diverse image sets show that our implementation approach achieves an excellent balance between simplicity, accuracy, and computational speed.