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This paper described a method of automatic extraction of abnormal points from electric cable. The cable changes the color depending on the weather, environment and used period. We define low brightness area and classify size of it. We divide them into abnormal and normal with discriminant analysis method. As the result, we can detect all arc-marks for no rust cables. On the other hand, we can detect...
This paper describes fuzzy damage extraction method for ultrasonic nondestructive testing images. In our experiment, we employ a piece of wind turbine blade as a specimen has artificial damages. We acquire ultrasonic waveforms from scanning lines on surface of the pecimen using an ultrasonic single probe. To extract the damages, we calculate fuzzy degrees of average difference data of all scanning...
This paper describes a method of average difference imaging and applying it to ultrasonic nondestructive evaluation of wind turbine blade. Average difference image is made from the means of intensity difference among several images. The image demonstrates the difference between an interested image and the other images. In performance test of this method, we employ a specimen of wind turbine blade...
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