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Magnetic resonance (MR) images can be used to detect lesions in the brains of multiple sclerosis (MS) patients and is essential for diagnosing the disease and monitoring its progression. An automatic method is presented for segmentation of MS lesions in multispectral MR images. Firstly a PD-w image is subtracted from its corresponding T1-w image to get an image in which the cerebral spinal fluid (CSF)...
LS estimator is the classical diffusion tensor estimate method. It could get optimal result with highest estimate efficiency on the condition that the noise distribution is Gaussian strictly. But it is quite not robust, for even one outlier could make the error result. M estimator is more robust than LS estimator, but its breakdown point is very low, thus it could not resist the outliers effetely...
This paper presents a 1mm2 monolithic microwave integrated circuit (MMIC) LNA/SP2T switch front end module (FEM) solution based on E/D mode GaAs pHEMT technology for WLAN 802.11a applications. The proposed FEM has a two stage Enhancement-mode pHEMT LNA and Depletion-Mode pHEMT SP2T switch fully integrated on a single die with an area of 0.916×0.95mm2. The SP2T switch in the FEM enables WLAN transmit...
This paper makes a study on fast skew angle detection for document images. Given a document image and return the skew angle. First this algorithm computes the horizontal gradient image by the input image and then merges the characters area in the text line block, to get the valid text line by non-text area filtering, at last, statistic the text line characteristics to estimate the input image skew...
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