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This paper presents discrete wavelet transform (DWT) and short-time fourier transform (STFT) applications for different industrial applications. These two transforms have been compared in different fields, and their implementations are similar. The experiments and simulations show another aspect for both transforms in order to analyze the target information.
This paper presents optical design, proof-of-principle experiments, and post-signal processing for a wafer microcrack detection system. Cylindrical lens and Solid Immersion Lens (SIL) are used for the optical module. Near-field probe array is also investigated for future implementation. For post-signal processing, Probabilistic Neural Network (PNN) is used in order to identify vibration-induced deviation...
This paper presents design and proof-of-principle experiments for a real-time in-line wafer microcrack detection system. The line-scanning method is chosen because entire wafer can be inspected without image processing technology. Short-Time Discrete Wavelet Transform (STDWT) is developed in order to determine reflective characteristics of microcrack, and smaller computation complexity in order to...
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