Then, the image grey level of every subimage is approximated by low-order polynomial according to least-square criterion.

然后各子图内像素灰度值以低阶多项式表示，依最小二乘准则以多项式逼近原图像的子图像。

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Then, the image grey level of every subimage is approximated by low-order polynomial according to least-square criterion.

然后各子图内像素灰度值以低阶多项式表示，依最小二乘准则以多项式逼近原图像的子图像。

youdao