Method for determining the quality of print using pixel intensit

Details Method for determining the quality of print using pixel intensit Method for determining the quality of print using pixel intensit

1990-06-14

1992-09-01

Lall, Parshotam S.

Boots, shoes, and leggings

364555, 382 8, 382 18, 382 51, G06F 1520, G06K 966

Patent

active

051445662

ABSTRACT:
A print inspection method in which an area of printed material is optically scanned to obtain image data representing picture elements having variable intensity levels includes counting the number of picture elments at a particular intensity level in the area scanned to thereby generate a frequency distribution of the intensity level of the image data in the area scanned. The frequency distribution generated is compared to a stored reference frequency distribution of intensity levels of the image data. A statistical comparison with the reference data is utilized to determine whether or not the printed material is satisfactory.

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