I have found values of entropy, mean squared error and PSNR of edge detected images with respect to original images. I have different five edge detected images with different threshold and sigma values. To find which is the best combination of threshold and sigma, I need to find the best edge detected image.
Without visual inspection, Can I find it from the above values? I found from research paper that, if mean squared error image is low, detected edges are good. Can I use this concept? How does PSNR and Entropy affects?