Effects of Scene Modulation Image Blur and Noise Upon Human Target Acquisition Performance

摘要

Today's target acquisition systems are often composed of electro- optical imaging systems as well as the human observer. Instead of viewing a scene directly with his own eyes, the observer often views an image of the actual scene which has been produced by an electro-optical system. This system may be composed of detectors, transmission and storage devices and a display. Errors are inherent in any transmission or display system. They are an unavoidable result of the physical limitations of the system. A classic dilemma in image transmission and display is that we must compromise between the conflicting constraints of dynamic range and noise. The most important problem in image display is the limited dynamic range of typical displays. High fidelity images such as those seen by the human eye in the real world obtain dynamic ranges far in excess of 1000:1 or even 10000:1 (Stockham, 1975), whereas displays have typical dynamic ranges of 300:1. Other problems that may be introduced in any transmission and display system are image blur and noise.