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Broadband emissions centered at 560 nm, 770 nm, and 1380 nm from glass-clad crystal fibers with 3-dB bandwidths of 98, 180, and 240 nm were used for various biomedical and in-vivo optical tomography applications with cellular resolution. The adjacent image pixel cross talks are less than −20 dB due to the near Gaussian spectral shapes of the broadband emissions.
Broadband emissions centered at 560 nm, 770 nm, and 1380 nm from glass-clad crystal fibers with 3-dB bandwidths of 98, 180, and 240 nm were used for various biomedical and in-vivo optical tomography applications with micrometer in resolution.
Active crystal fibers can generate CW and near-Gaussian-shape milliwatt-level broadband emissions at 560 nm, 770 nm, and 1380 nm with 3-dB bandwidths of 98, 210, and 240 nm, respectively. They are eminently suitable for ultrahigh-resolution optical coherence tomography.
In this paper, we propose a classification-based face detection method using compound features. Four kinds of features, namely, intensity, Gabor filter feature, decomposed gradient feature, and Harr wavelet feature are combined to construct a compound feature vector. The projection of the feature vector on a reduced feature subspace learned by principal component analysis (PCA) is used as the input...
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