An Image Preprocessing Model of Coal and Gangue in High Dust and Low Light Conditions Based on the Joint Enhancement Algorithm

Table 3

Comparison of SSIM of different K-means clustering segmentation methods.

Methods	Adaptive filtering	Bilateral filtering	Global histogram	The method
Scene 1	0.1976	0.1673	0.1406	0.0681
Scene 2	0.2614	0.2223	0.1623	0.0780
Scene 3	0.2903	0.2545	0.1580	0.1092
Scene 4	0.3001	0.2291	0.3543	0.0283
Scene 5	0.2457	0.1814	0.2662	0.0180
Scene 6	0.0856	0.0632	0.0542	0.0408