Method and apparatus for real time motion and image analysis

Details Method and apparatus for real time motion and image analysis Method and apparatus for real time motion and image analysis

1990-09-28

1992-07-14

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250237G, 358406, H01J 4014, G06K 918

Patent

active

051305259

ABSTRACT:
A document image scanner is provided in which a platen is provided with an optical target in the form of a succession of ruling lines provided at one edge thereof. The ruling lines are inclined at an angle relative to a direction of scan of an optical sensor array such that 5% or less coverage change is provided over each pixel on a scanning line of the array. An output signal from scanning each line can be produced as a square wave signal. From the generated signal, the scanning motion may be corrected. A diagnostic tool is also provided for diagnosing scanning motion using at least two of the optical targets.

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patent: 4853535 (1989-08-01), Suganuma
patent: 5015846 (1991-05-01), Okuyama et al.
"Fundamentals of Digital Copiers"--Canon, Oct. 1984.

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