Abstract
The article is devoted to an analytical review of the state and prospects of development of video spectral comparators intended for technical studies of documents. This equipment belongs to the spectrosonal television systems that allow obtaining images in various parts of the visible and near-infrared spectrum. Currently, television spectrosonal visualization is one of the methods of systematic study of documents and handwritten book monuments. The development of spectrosonal imaging is initially associated with photographic research methods. Television and optoelectronic devices made it possible to switch to a fundamentally new hardware base due to a number of advantages: contrast and spectral sensitivity, efficiency of image control and processing. Video spectral comparators are an example of such equipment which completely solves the main tasks related to technical examination of documents.
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