客观测定胶片分辨率的实验研究

An Experimental Research to Objectively Test the Resolving Power of Films

提出了用 Fourier功率谱法评价胶片分辨率值的理论判据。这是一种用光学信息处理原理对胶片分辨率图案的 Fourier谱进行分析处理的客观评价方法。用胶片分辨率图案的 Fourier变换频谱的最外次极点作为客观评价胶片分辨率的尺度 ,并找出了胶片分辨率与其 Fourier变换频谱的最外次极点有近似线性关系。

A criterion to determine the limiting resolving power of film by using Fourier power spectrum is proposed in this paper. It is an objective evaluation method, in which the Fourier frequency spectra of the resolving power of film are analyzed and processed according to the optical information processing principle. The scale to objectively testing the resolving power of film is derived through analysis of the Fourier power spectrum critical maximum coordinates of the film. The similar linear relations between the resolving power of the film and the critical maximum are defined.