Image Noise Removal Method Based on Improved Nonlocal Mean Algorithm

Table 4

PSNR of images with Gaussian noise after using different denoising algorithms.

	Lena				Character image
	AMF	28.15	26.19	24.51	22.13	28.16	26.27	25.52	23.45
NLM	33.83	32.56	31.86	30.49	32.83	31.97	30.53	30.21
Improved NLM	33.75	32.34	31.53	30.15	34.56	33.61	32.14	31.89