Film picture reader

Abstract

Abstract PURPOSE:To detect and inform it if dust or the like is adhered to an optical input end face of a light collector by using a differential extraction section to extract the difference when a picture element signal is outputted from a picture read section and using a discrimination section so as to discriminate it as a picture fetch error when the difference exceeds a setting value. CONSTITUTION:A difference extraction section 51 stores one line of density data in receiving a density data from a photoelectric conversion section 50 when no film is loaded to the reader and a calibration mode is set. Then the difference of adjacent density data is extracted and it is used as the difference data and fed to an output section 52 and a decision section 53. The decision section 53 decides it whether the size of the difference data fed from the difference extraction section 51 is larger than the preset value or not. When the difference data exceeds the setting value, it is decided that a dust or the like is adhered to the optical incident end face of the light collector, a picture fetch error signal is generated and fed to a display device 54.

Inventors

• 👤 Yoshiro Oyama

Bibliographic Details