Image analysis – Applications – Surface texture or roughness measuring
Patent
1994-09-12
1996-07-02
Chin, Stephen
Image analysis
Applications
Surface texture or roughness measuring
382141, 356382, 356430, 25055907, 25055928, G01N 2100
Patent
active
055331394
ABSTRACT:
An image processor based system and method are provided for recognizing predefined-types of coating density imperfections in a web. Specific imperfection-types to be analyzed include continuous-type, as well as point-type, anomalies. Continuous-type imperfections are recognized in a moving continuous web through the accumulation and integration of density data on the web passing through a system imaging area. Depending upon the type of imperfection to be imaged, the light source provides either constant illumination or strobed illumination of the moving coated web. For most types of imperfections, transmissive illumination of the web is used, however, for point-type anomalies reflective illumination is possible, particularly if the web is static. A machine vision image processor contains predefined lookup tables which allow adaptive control of web illumination within the imaging area. An integrating sphere is used to provide for uniform web illumination. Corresponding machine vision based imperfection recognition processing routines are also described.
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Finnicum Douglas S.
Parker H. Galen
Young Richard D.
Bailey, Sr. Clyde E.
Chin Stephen
Eastman Kodak Company
May Timothy J.
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