Their mean gray values were higher in the granular layer than in the pyramidal layer (P<0.05).
颗粒层中两者的平均灰度值都高于锥体层（P＜ 0．05）。
The first stage, performed by the extraction unit (110), employs an analysis of gray values of the image data in order to extract the candidate region.
由提取单元（110）执行的第一阶段使用对图像 数据灰度值的分析以便提取候选区域。
The algorithm can measure discontinuity of gray values by using Laplacian and adjust automatically gray values according to intensity of response to gray mutation in Laplacian.
该算法利用拉普拉斯微分算子对像素灰度值的不连续性进行量化，根据微分算子对灰度突变的响应强度进行自动调整掩模内的各像素权值。
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