The second step is decoded process, in which the coded image is filtered and reconstructed in order to obtain a visible object image with high resolution.
第二步是解码过程，对编码图像进行滤波和重建，以便获得高分辨率的可视目标像。
Then, it used second order polynomial to fit the Central Line of text line, and constructed the object function of lens distortion.
然后利用二次多项式模型拟合文本行的中心线，并建立径向失真校正的目标函数。
Second: via experimental data we get the second-order system model for each control object by using least square curve simulation.
通过现场实验数据，并利用最小二乘曲线拟合算法建立被控对象各通道之间的二阶系统模型。
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