因此，在被动式测量时，要密切注意发射源温度以及发射源发射信号大小，以便获得最佳仪器响应函数校正结果。
So, during passive FTIR measurement, the temperature and the emission signal amplitude of the source must be observed carefully in order to get satisfactory instrument response function.
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。
Then, it used second order polynomial to fit the Central Line of text line, and constructed the object function of lens distortion.
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