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本文简述了影象数字化的概念,重点讨论时序控制器的原理,结构和功能。现代科学技术的不断发展,摄影测量工作中也引进了一些新的概念,比如全数字化自动测图,数字图象处理……,但无论是数字化测图或数字图象处理,其第一步工作都离不开影象数字化。所谓影象数字化,就是将航摄象片上连续变化的灰度信息,通过采样、量化(通常所说的 A/D 变换)变成离散的数字量。然后送到数字电子计算机完成各种数学变换。
This article briefly describes the concept of digital imaging, focusing on the principle, structure and function of the timing controller. The continuous development of modern science and technology, photogrammetry work also introduced some new concepts, such as fully digital automatic mapping, digital image processing ... ..., but whether it is digital mapping or digital image processing, the first step of its work Can not do without digital image. The so-called image digitization, is the continuous change on the aerial camera grayscale information, through sampling, quantization (commonly referred to as A / D conversion) into a discrete digital. And then sent to the digital computer to complete a variety of mathematical transformation.