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

Table 2

Comparison of information entropy of different K-means clustering segmentation methods.

Methods	Adaptive filtering	Bilateral filtering	Global histogram	The method
Scene 1	2.2552	2.5855	2.8587	3.7505
Scene 2	2.2409	2.6583	3.3641	3.9814
Scene 3	1.8878	2.5136	3.2278	3.4684
Scene 4	5.1740	5.7263	5.7234	6.2987
Scene 5	3.8133	4.5667	4.8828	5.1010
Scene 6	2.0753	2.3148	3.2043	3.4844