Digital image analysis of coating defects
1993; Elsevier BV; Volume: 22; Issue: 1-4 Linguagem: Inglês
10.1016/0033-0655(93)80019-7
ISSN1873-331X
AutoresEdwardD. Cohen, Ronald Grotovsky,
Tópico(s)Industrial Vision Systems and Defect Detection
ResumoA simple, low cost, easy to use computer-based Digital Image system has been developed for characterizing defects which occur in various types of organic films. The system uses an optical microscope, high resolution TV camera, frame grabber to display the image on Macintosh computer and software to analyze and characterize the image. All components are commercially available. Using this system, many different defects which are typically seen in organic coatings and the support on to which they are coated, such as spots, bubbles, reticulation streaks and pinholes can be rapidly characterized. Quantitative information about the defect, such as size and frequency can be rapidly obtained to assist in determining the cause. Images obtained of the defects can also be enhanced to obtain characterization information not easily seen in the defect. The system has applications in the R and D laboratory for understanding defect mechanisms, in trouble-shooting plant and end-use problems and in the control laboratory. It can also be used to provide routine quantitative testing information on defects that have been typically evaluated by subjective tests and comparison with go/no-go standards. The system is easier to use than viewing with a glass or conventional microscope and a permanent record of the defects can easily be stored and retrieved in a computer database to assist in troubleshooting.
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