Determination of light levels in a flat bed scanner using a gelatin-bromide photographic paper

نویسندگان

  • Jean-Paul Gandolfo
  • Bertrand Lavédrine
چکیده

The amount of light received by a document during a scanning or photocopying process has been addressed in different papers. The purpose of this study is to propose an alternative way to evaluate the irradiation that reaches the surface of the documents during these operations measuring the density produced on a photographic paper during the scanning. This method, requiring a densitometer and a black and white darkroom, has been applied to an office flat bed scanner (Agfa Snapscan 600). The irradiation, depending on the choice of resolution, can range from 4 to 25 lux.hours, that is to say, much less than one hour under 50 lux.

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تاریخ انتشار 2002