Meanwhile, the gray prediction method is applied on line, the predicted results replacing the measured value of controlled objects are used for control operation.
并将灰色预测在线应用，用其预测结果代替被控对象测量值进行控制运算。
The extracted objects with different ranges usually have different distribution of gray scale value, due to uneven distribution of light and various properties of the crack background of fingerprints.
由于光线分布不均匀或斑块噪音干扰等原因，往往使所要处理的指纹的灰度值分布缺乏均匀性。
Remote sensing images indicate the physical objects with different attributes and their distribution through pixel gray value differences and the level of spatial variation.
遥感图像通过像元灰度值的高低差异和空间变化来表示不同属性的地物目标及其分布情况。
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