Jones R A, Coughlin J F
Perkin-Elmer Corporation, Norwalk,Connecticut, USA.
Appl Opt. 1966 Sep 1;5(9):1411-4. doi: 10.1364/AO.5.001411.
In microdensitometry, the tracing of a knife edge does not yield a step function. Therefore, when a photographic image is traced the result is not a spatially true representation of the image. A computational procedure has been developed that corrects for microdensitometer effects. This is achieved by obtaining the inverse Fourier transform of the reciprocal values of the microdensitometer modulation transfer function and convolving the resulting function with the digital output of the microdensitometer scan. The result is the corrected scan data for the photographic image. This technique has been applied successfully to edge gradient analysis for both analytic and experimental edges. The compensation for microdensitometer degradation should have a number of applications.
在显微密度测定法中，刀刃的描迹并不会产生阶跃函数。因此，当对一幅摄影图像进行描迹时，结果并非该图像的空间真实表示。已开发出一种计算程序来校正显微密度计的影响。这是通过获取显微密度计调制传递函数倒数的逆傅里叶变换，并将所得函数与显微密度计扫描的数字输出进行卷积来实现的。结果就是摄影图像的校正扫描数据。该技术已成功应用于分析边缘和实验边缘的边缘梯度分析。对显微密度计退化的补偿应该有许多应用。
