Image Structure and Pixels
Lawrence R. Griffing · 2023
Images have structure. The order in which the image elements come together, or render, also describes the image structure. Image legibility, or the ability to recognize text in an image, is another way to think about resolution. Images acquired at high resolving power are quite large on displays that have small resolving power. As long as decreasing the spatial frequency of the display does not result in pixelation, the process of magnification can reveal more detail to the eye. To record objects within vast or small spaces, changing over long or very short times, requires technology that aids the eye. Limits of resolution set the boundaries of scale intrinsic to the eye or any sensing device. To resolve the alternating pattern of the object pixels, the camera has to sample the object at twice its spatial frequency. This level of sampling uses the Nyquist criterion and comes from statistical sampling theory.