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本文共分为四节。第一节论述了影像清晰度与分辨率的差异。以实例说明了清晰度是观看者的主观感觉。提出了一种根据MTF曲线来判别影像清晰度的方法。第二节叙述了不同规格胶片影像的信息存储容量及如何能将其良好地转换为数字影像。第三节叙述了模拟及模、数混合的(DI)后期加工链中不同操作步骤对信息传递和影像质量的影响。第四节根据人视觉系统的分辨力极限导出了高质量4K放映的有效性和必要性。
This article is divided into four sections. The first section discusses the difference between the definition and resolution of the image. An example shows that definition is the viewer’s subjective feeling. A method of discriminating image sharpness based on MTF curve is proposed. The second section describes the different types of film image information storage capacity and how it can be well converted to digital images. The third section describes the impact of different operational steps on analog and analog-digital mixed (DI) post-processing chain on message delivery and image quality. Section IV derives the validity and necessity of high-quality 4K projection based on the resolution limit of the human visual system.