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用正弦光栅图形刺激来研究人视觉过程的成像性质已有20多年。这些研究的基础理论与光学、电学和其他信息科学中使用正弦测试信号的理论一样,是基于线性系统的频谱分析法。从数学上来说是应用傅里叶转换的结果。类似的傅里叶学说已经应用到照相底片、光导摄像管、光导纤维和其他成像系统中。这一手段的成功导致Schade把这一技术延伸到视觉过程中。最初的研究常是集中于高空间频率,其正弦波反应曲线类似于一个被动的光学系统。Schade虽然也获
Sine grating stimuli have been used to study the imaging properties of human visual processes for more than two decades. The basic theory of these studies, like the theory of using sinusoidal test signals in optics, electricity and other information sciences, is based on the linear system of spectral analysis. Mathematically, the result of applying Fourier transforms. A similar theory of Fourier has been applied to photographic films, photoconductive tubes, optical fibers and other imaging systems. The success of this approach led Schade to extend this technology into the visual process. The initial research often focused on high spatial frequencies, with sinusoidal response curves similar to a passive optical system. Schade though also won