Unverified50% confidenceFactExact time
A study proposed converting the Fourier amplitude spectrum into a two-dimensional frequency-amplitude persistence image (FA-PI) for impact echo defect detection.
1
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50%
Confidence
Long-term
Relevance
10/14/2026
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Related Claims
UnverifiedFA-PI is constructed by mapping each retained Fourier component into a two-dimensional space, with one coordinate being the frequency bin position and the other being the amplitude, and then applying a Gaussian kernel function for smoothing to generate the persistence image.73% similarUnverified识别隐含网格可通过二维傅里叶变换（2D FFT）寻找频域周期性峰值、自相关分析、或结合边缘检测（Sobel/Canny）与霍夫变换等图像频率分析方法实现68% similar
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