Poisson noise removal from high-resolution STEM images based on periodic block matching

Table 7 Fidelity ( 29 ), in picometers, between ground truths and noisy (denoised) images

Input	Peak	Dose [C/cm ² ]	Fidelity [pm]	np-l16	np- π N16	np- π U16
Silicon (disloc.)	6	0.5476	17.81	n/a	2.71	1.66
Silicon	6	0.7853	8.59	2.77	1.32	1.29
Gallium nitride	7	1.5400	17.09	3.43	1.16	1.16
Silicon	9	1.5706	7.75	1.57	0.74	0.73
Silicon (disloc.)	11	2.8064	n/a	0.65	0.50	0.54
Gallium nitride	12	3.8499	5.54	0.70	0.59	0.57
Silicon (disloc.)	15	5.6812	1.26	0.49	0.38	0.43
Silicon	21	7.8530	0.98	0.73	0.35	0.37
Silicon	34	15.7061	0.56	0.53	0.28	0.28
Silicon (disloc.)	49	28.4745	0.42	0.30	0.27	0.29

Root mean square of the distances between atom centers as detected in the noisy (denoised) image and the ground truth, with the value ‘n/a’ indicating that no neighboring atoms could be detected in the noisy (denoised) image. The best result in each row is in bold face.