Open Access
表1
每个区域特征值的提取结果
| 区域号 | 亮度 | 对比度 | 信息熵 | 狭长度 |
| 1 | 142.794 | 28.855 | 6.828 | 1.475 |
| 2 | 119.994 | 28.497 | 6.781 | 2.392 |
| 3 | 159.978 | 25.769 | 6.653 | 1.133 |
| 4 | 163.801 | 27.187 | 6.693 | 1.234 |
| 5 | 204.163 | 37.064 | 6.676 | 2.519 |
| 6 | 153.111 | 26.223 | 6.681 | 2.068 |
| 7 | 116.363 | 31.878 | 6.911 | 1.993 |
| 8 | 24.482 | 21.838 | 5.364 | 1.504 |
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
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