Improving Spatial Adaptivity of Nonlocal Means in Low-Dosed CT Imaging Using Pointwise Fractal Dimension

Table 1

PSNR for the test image.

Noise	PSNR of	PSNR of	PSNR of
parameters	the noisy image	NLMs	PWBCD-NLMs
𝑓𝑖=2.5,𝑇=2𝑒+4	23.29	34.19	34.95
𝑓𝑖=3.5,𝑇=2𝑒+4	21.88	33.79	34.59
𝑓𝑖=4,𝑇=2𝑒+4	21.30	33.45	34.16