An Efficient FPGA Implementation of Optimized Anisotropic Diffusion Filtering of Images

Figure 18

Results showing the variance of PSNR measured against the number of iterations measured for images of various resolutions. It has been found that the number of iterations ranges between 4 and 5 to attain the most denoised output close to the original. The filter settings are as follows: Sigma () for random noise = 12, number of iterations = 4, in (3) = 1/7, and Kappa () in (4) = 15. : image resolution 150 × 150, (—): image resolution 256 × 256, and (- - -): image resolution 512 × 512. Various images with the similar resolution have been tested and the averages have been plotted with identical curves with their respective resolutions.