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用于计算图像的频率响应，即SFR或者MTF

于 2022-02-11 发布文件大小:1,016.46 kB

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用于计算图像的频率响应，即SFR或者MTF。程序使用C语言编写。。假设像素间隔为d，从最终图像中选取含有黑白边缘的局部区域。利用梯度算子确定边缘的倾斜角度θ，将图像的灰度信息利用光电转换函数转化为光强信息，并将其投影到垂直于边缘的直线上。在该直线上按照dsinθ/4的间隔划分坐标，并将投影的数据按照位置放入对应的坐标间隔中，再对同一坐标间隔内的强度数据取平均值。对该数据进行滤波[21]后，得到过采样的边缘扩展函数(ESF)。将ESF求微分获得线扩展函数(LSF)

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用于计算图像的频率响应，即SFR或者MTF

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