Fitzpatrick, Cella, Harper & Scinto
Color film reading apparatus providing high-gradation color signals
 A color film reading apparatus capable of generating high-gradation color signals from either a color negative or positive film includes a holding device for holding a color negative film, illuminating apparatus for projecting illumination light onto the color negative film, a reading unit for reading image data from the light projected through the color negative film, and shading circuitry for performing shading correction. Control circuitry controls the reading unit to cause the reading unit to raed data from an unexposed portion of the negative to obtain shading correction data. In the case of a positive film, the controlling circuitry sets the shading correction data on the basis of data obtained from the illumination light. Further, a high-gradation color image may be obtained from either a film original or a reflection from an original document. 
Canon Kabushiki Kaisha
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Yasumichi Yoshinori Kenichi
Suzuki Ikeda Outa