Acta Optica Sinica, Volume. 20, Issue 12, 1617(2000)
Study on Phase Demodulation Technique Based on Wavelet Transform
A novel phase demodulation technique in frequency domain based on wavelet transform is introduced. Handling the original modulated grating image with wavelet transform, the object background image is created. And subtracting these two images, a relative distorted grating image is obtained. The background components in spectrum of the relative image are basically removed and the useful one is leached easily. The steep gradient and complex object shapes can be measured automatically with this technique.
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[in Chinese], [in Chinese], [in Chinese]. Study on Phase Demodulation Technique Based on Wavelet Transform[J]. Acta Optica Sinica, 2000, 20(12): 1617