Detection of central positions of noisy rounded square function using modified Haar wavelet transform and Haar-Gaussian wavelet transform

Feijun Song; Yu Lei; Suganda Jutamulia

doi:10.1117/1.602491

1 May 2000 Detection of central positions of noisy rounded square function using modified Haar wavelet transform and Haar-Gaussian wavelet transform

Feijun Song, Yu Lei, Suganda Jutamulia

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Optical Engineering, Vol. 39, Issue 5, (May 2000). https://doi.org/10.1117/1.602491

We propose and demonstrate new wavelet transforms, the modified Haar wavelet transform and Haar-Gaussian wavelet transform, for the detection of central positions of a noisy rounded square function. The advantage is the immunity of the wavelet transform to random noise. The alternative technique based on first- and second-order differentiation cannot be applied when the signal function is corrupted by noise. The proposed technique can be used for lead inspection of surface mount devices in the electronic industry.

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Feijun Song, Yu Lei, and Suganda Jutamulia "Detection of central positions of noisy rounded square function using modified Haar wavelet transform and Haar-Gaussian wavelet transform," Optical Engineering 39(5), (1 May 2000). https://doi.org/10.1117/1.602491

Published: 1 May 2000

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