Mingying Zhao

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Ultrasonic computerized tomography (CT) is becoming more important than C-scans in nondestructive inspection due to its rapid scanning ability. However, ultrasonic CT poses challenges due to ray-bending in anisotropic media. This paper proposes an improved ray-tracing algorithm. Based on this algorithm, a bend-ray multiplicative algebraic reconstruction(More)
In this paper, the existing approaches to and open problems of extracting moving objects from a video sequence were reviewed briefly, and a novel method was proposed and verified. The method extracts contours of moving objects mainly by combining gradient information extracting with three-frame-differencing and connectivity-testing-based noise reduction.(More)
We have developed a laser ultrasonic visualization(LUV) equipment. It can be used to study the ultrasound propagation in an arbitrary-shaped object, and also be used to the nondestructive inspection of materials and structures. The LUV equipment consists of the hardware and the software. The hardware consists of a pulsed laser, a scanning mirror(More)
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