合焦
合焦-
线阵CCD遥感相机在推扫过程中地面景物不断变化，而一般的图像清晰度评价函数只能在相同的图像内容下作比较来判断系统是否合焦。
In the process of remote sensing camera pushbroom , the contents of arbitrary random scenes are different , the ordinary definition evaluation functions are effective with the same scene to estimate an camera system focused or not , but the image power spectra have invariance from scene to scene .