Title: Optical image sensor semiconductor apparatus

Abstract: The optical intensity pattern of a two-dimensional image field is electrically scanned a line at a time by a shift register access technique, thus providing a first stream of bits for each line. Each of these bits in a given line is compared with a dither coded second stream of bits generated in response to the background illumination (absence of image) along a line immediately adjacent to the line being scanned. The resulting sequence of comparisons is a dither coded signal representation of the line being scanned, which is compensated for nonuniform background illumination of the image field.

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Inventors: Tompsett, Michael F. (New Providence, NJ, US)

Application Number: 883476
Filing Date: 1978-03-06
Publication_date: 1980-03-04
Assignee: Bell Telephone Laboratories, Incorporated (Murray Hill, NJ)
Primary Class(es): 365/114 315/169.2
Other Classes:
US Patent Ref:

3944816	Mar, 1976	Harada	250/211.
3967052	Jun, 1976	Judice	178/6.
3996599	Dec, 1976	King	357/30.
3997719	Dec, 1976	Judice	178/7.

Other Refs:
Primary Examiner: Fears, Terrell W.
Assistant Examiner:
Attorney: Caplan; David I.