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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。
The theoretical criterion for evaluating the resolution of film by Fourier power spectrum method is proposed. This is an objective evaluation method for analyzing and processing the Fourier spectrum of the resolution pattern of film using optical information processing principle. The outermost pole of the Fourier transform spectrum of the film resolution pattern is used as an objective measure of the resolution of the film and an approximate linear relationship between the film resolution and the outermost pole of its Fourier transform spectrum is found.