Cat Swarm Optimization Based Functional Link Artificial Neural Network Filter for Gaussian Noise Removal from Computed Tomography Images

Table 1

Result for filters in terms of PSNR value in dB.

Images	Noisy	Mean filter	Wiener filter	FLANN-LMS	CSO-FLANN
Image 1	41.77	44.37	44.98	45.40	45.91
Image 2	41.73	44.49	45.15	45.60	46.07
Image 3	41.75	44.35	44.20	44.99	46.28
Average computational time (sec.)		1.78 s	1.86 s (testing)	321.48 s (training + testing)	7573.621 s (training + testing)