grey-level statistics 灰度统计信息
The test methods at present fall into three types: threshold method, morphological method and grey level statistics method.
目前纸病检测方法分为阈值法、形态学方法、灰度级统计法三类。
An algorithm of distinguishing day and night with image statistics is proposed based on the analysis of the characteristics of the grey level of actual road surface.
该算法通过对实际路面的平均灰度值随时间变化趋势进行了统计学习，寻找出随天气季节变化的昼夜区分时间。
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