G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 21/89 (2006.01)
Patent
CA 2080587
The two-dimensional medium-pass fil- ter principle is used to acquire a sharpened image initially. In practice, the sharpened im- age is obtained from the difference of a linear array signal of a partially out-of-focus image from another linear array signal of the same image but in focus. Integrated intensity of dirt specks higher than a user selected threshold are measured and accumulated. Each integrat- ed intensity value is converted into its corre- sponding speck size with the use of a prede- fined look-up table. The counter generates a dirt speck histogram and statistical data with- in a preselected time interval or area coverage.
Gia Nguyen Nam
Jordan Byron Dale
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Pulp And Paper Research Institute Of Canada
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