Image improvement using image processing for scanning acoustic tomograph images

This paper describes an image restoration technique that improves the sharpness of an inspection image for LSI packages using a scanning acoustic tomograph(SAT). This technique performs optimal restoration, depending on the type of probe used for imaging, by estimating the intensity distribution of the ultrasonic beam at the interface of testing and by eliminating the influence. The result of an experiment shows that the contrast of SAT images is improved 1.6 times.