Understanding Imaging Specifications

摘要

Two of the most important qualities of any image are contrast and resolution. Image contrast specifies the range between light and dark portions of an image and is normally measured between the relevant features in the image and the background surrounding those features. The ideal image has ultimate contrast, with the desired information having intensity values of absolute white and background intensity values of absolute black.rnSpatial resolution-the ability to resolve two closely spaced objects-is a distance measurement associated with the smallest detectable object. The resolution required depends on the task of the imaging system. For example, if a system is needed to locate a part to within one inch, the system resolution needs to be less than one inch.