Speckle Noise Removal Model Based on Diffusion Equation and Convolutional Neural Network

Table 2

PSNR results of DnCNN on different training sets.

Test image	I	II	III	IV	V	VI	VII	VIII	Average
Noise level σ = 15
DnCNN (single) DnCNN (mix)	32.2732.01	34.64	32.62	33.37	31.72	33.29	35.02	33.39	33.29
		34.22	32.11	33.12	31.54	32.93	34.83	33.01	32.97
Noise level σ = 25
DnCNN (single) DnCNN (mix)	29.51	32.48	30.28	30.92	29.43	30.48	33.36	30.89	30.91
	29.30	32.12	29.34	30.12	29.08	30.21	33.01	30.34	30.44