Figure 7From: Geometrical Feature Extraction from Ultrasonic Time Frequency Responses: An Application to Nondestructive Testing of MaterialsCentral Frequency, Centroid Frequency, and Fractional BandWidth operators variance and deviation from the theoretical result. Simulation parameters for LTV were mean scatterer diameter mm, AWGN of variance varying from 0.05 to 0.5. Bias (marker "*" or "o"), and variance (vertical bars).Back to article page