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Method for producing correct fingerprints

建立日期：2018/02/12
  • 作者： S. Madhusudana Rao
  • 出處： Department of Instrumentation, Indian Institute of Science
  • 內容： The conventional method of producing fingerprints by total internal reflection using a right-angle prism does not give true size images. In this case an anamorphic real image is formed by the Scheimpflug condition with keystone distortion. A method of combining a single prism with the right-angle prism for anamorphic stretching to get the correct fingerprint image is described. The method of constructing such a type of an optical system is discussed in detail. The method is useful to directly obtain the correct fingerprints using a CCD camera.
  • 檔案下載：Full Text
  • 下載次數：278
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