A Study on Weak Edge Detection of COVID-19’s CT Images Based on Histogram Equalization and Improved Canny Algorithm

Table 4

Comparison of detection indexes of diffuse ground-glass shadow in both lungs.

	The Canny algorithm	The HMS algorithm	The ETAR algorithm	The proposed algorithm
MSE	1.1230	8.2723	1.3313	1.0513
SNR	0.0457	0.0475	1.4373	6.6078
MAE	155.2991	157.5637	196.9864	65.0062