Performance Evaluation of Noise Reduction Filters for Color Images through Normalized Color Difference (NCD) Decomposition

Table 1

List of NCD, NCD_gau, and NCD_dis evaluations for (2𝑁+1)×(2𝑁+1) vector mean filters.

𝑁	NCD (×10^2)	NCDgau (×10^2)	NCDdis (×10^2)
2	10.92	2.72	8.21
3	13.15	1.96	11.19
4	14.73	1.55	13.18
5	16.05	1.29	14.75