SYMPOSIA PAPER Published: 01 January 1992

Image Enhancement Techniques for Ultrasonic NDE Applications


Ultrasonic nondestructive evaluation (NDE) methods are reliable in the inspection and certification of composite structures. Complex structures are scanned by sophisticated automated multi-axis robotic systems. The acquired data are processed to generate images based on peak-amplitude or time-of-flight data. Digitizing of the ultrasonic information has opened the door to powerful computer graphics image enhancement techniques.

Image enhancement techniques can be applied such that critical information is highlighted and defects detected in the structure are classified. Used properly, image enhancement of digitized data dramatically improves the interpretability of ultrasonic information. A wide variety of image enhancement techniques, applicable in particular to ultrasonic NDE, are discussed. In addition, a new method of interpreting ultrasonic data by working from digitized full-volume waveform information is presented. This work, combined with statistical analysis methods, enables the operator to perform complete post-scan evaluation.

Author Information

Steiner, KV
Center for Composite Materials, University of Delaware, Newark, DE
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Developed by Committee: D30
Pages: 330–343
DOI: 10.1520/STP20167S
ISBN-EB: 978-0-8031-5184-0
ISBN-13: 978-0-8031-1426-5