在军事、工业、医疗等应用中,由于传感器所接收的图象可能仅有百分之一以下的对比度,因此,无论显示或观察都有很大的困难。为了提高图象质量,必须对图象信息进行实时处理。本文分析了低对比度成象技术中存在的问题,提出了增强图象和减小噪声的原理和方法,最后介绍用数字处理提高成象质量的方法。 In military, industrial, medical and other applications, since the image received by the sensor may only have a contrast of less than one percent, it is very difficult to display or observe. In order to improve the image quality, the image information must be processed in real time. This paper analyzes the problems in the low contrast imaging technology, puts forward the principle and method of enhancing the image and reducing the noise, and finally introduces the method of using digital processing to improve the image quality.