Image analysis – Histogram processing – For setting a threshold
Patent
1988-09-30
1991-07-16
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
358106, 356237, 250572, 377 11, G06K 900, H04N 718, G01N 2100, G01N 2188
Patent
active
050330950
ABSTRACT:
A microcomputer based digital analysis system is disclosed which includes a microcomputer and a flatbed optical scanner to analyze test sheets of paper fabricated from a batch of pulp to be tested. A keyboard is utilized by an operator to select one of a predetermined number of reports. After a report is selected, a menu is displayed on a CRT which enables the operator to start the sample tests under the control of the microcompuer. Once the total document is scanned either by operator manipulation or under the control of an automatic document feeder, the microcomputer tabulates the data retrieved during each of the individual sheet tests as necessary to generate the report selected by the operator. The microcomputer processes the image data on a line by line basis. A dot buffer is created having a location for each pixel across the scanned line, wherein numbers are incremented as dots having image data are encountered in the scanned line. A dirt array is also created which contains the sum total of tabulated areas from the dot buffer in pixels for each contiguously connected group of pixels that have values greater than a recognition threshold. The dirt array is a summation array for each speck of dirt detected which stores data representative of the size of the dirt speck.
REFERENCES:
patent: 3389789 (1968-06-01), Watson et al.
patent: 4402604 (1983-09-01), Nash
patent: 4428672 (1984-01-01), Allard et al.
patent: 4661985 (1987-04-01), Akutsu
patent: 4724481 (1988-02-01), Nishioka
The New Artek AUTOCOUNT Brochure by Artek Systems Corporation.
"Automatic Image Analysis and Measurement Systems for the Pulp and Paper Industry", by Optomax, Inc., Apr. 1986.
Boudreau Leo H.
Cammarata Michael R.
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