Formation testing with digital image analysis

Details Formation testing with digital image analysis Formation testing with digital image analysis

1988-08-19

1992-05-12

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

382 28, 382 52, 358106, 356237, G06K 936

Patent

active

051134543

ABSTRACT:
A system is disclosed which increases the level of accuracy and precision for quantifying formations in paper. A CCD camera is used to capture data from a large portion of the paper. A diffuse illumination source is used to back light the paper sample. A microcomputer uniquely analyzes digitized image data. In this regard, after the image is stored in memory, a two-dimensional window is created and scanned over the entire frame to two-dimensionally analyze the image intensity level data. Average window intensity levels are generated that are compared to one another. In this regard, smaller local pixel variations are compared to these windows giving both regional and local variation data. Hundreds of thousands of data points are considered in these comparisons which are divided into sixty four difference levels. An array of 64 sample intervals are compiled, each representative of the number of accumulated data points that, when compared to their neighboring region, differ in intensity level by a percentage of the total mean intensity of the entire sample area. An index is generated that accurately reflects the gradient or rate of change over the sample sheet in two dimensions.

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patent: 4724481 (1988-02-01), Nishioka
patent: 4903316 (1990-02-01), Mongo et al.
The New Artek AUTOCOUNT Brochure by Artek Systems Corporation "Automatic Image Analysis and Measurement Systems for the Pulp and Paper Industry", by Optomax, Inc.

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