Image reading apparatus and method with improved method for corr

Details Image reading apparatus and method with improved method for corr Image reading apparatus and method with improved method for corr

1992-06-12

1995-08-15

Rogers, Scott A.

Facsimile and static presentation processing

Facsimile

Picture signal generator

358406, 358461, 358464, H04N 104

Patent

active

054424640

ABSTRACT:
A level-controlling-quantity setting apparatus sets a level-controlling-quantity so as to make it correspond to a level of output of a photoelectric conversion device. A level controlling apparatus controls output of the photoelectric conversion device so as to make a level of the output correspond to the level-controlling-quantity. A dark-state-output correction apparatus corrects output of the photoelectric conversion device by means of a dark-state-output, the dark-state-output being obtained by a process such that output of said photoelectric conversion device is controlled by means of said level controlling apparatus with a level-controlling-quantity, the level-controlling-quantity being same as a level-controlling-quantity used during a previous-image-reading-state.

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