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In this paper, a multi-aperture synthetic focusing technique based on virtual source is studied, which improves the lateral resolution and depth of the ultrasonic imaging with respect to the single array dynamic synthetic aperture focusing technique (SAFT). It only needs to store the N numbers data for the A scan line, and the complexity of the algorithm is greatly reduced compared with the full focus...
In order to process real-time phased array ultrasound imaging, to improve imaging resolution, and achieve on-line defect detection, total focusing method (TFM) imaging algorithm is used for the complete data, thrust reversers the focus and algorithm in different positions, the computational problems of large data can be solved by the FPGA parallel algorithms. After that, the total focusing method...
Total focusing method (TFM) is a post-processing algorithm for ultrasonic imaging, usually used for processing linear array data. In this paper, TFM is extended to obtain three-dimensional (3D) image based on two-dimensional array data. However, it takes a long time to get 3D information from large amount of 2D array data by TFM. So Sub-aperture matrix capture (SMC) and sparse array are taken into...
The license plate location plays an important role in the License Plate Recognition (LPR). According to the vertical projection and the morphological operations, this paper proposes a kind of locating method based on binary image in order to obtain accurate location of vehicle plate quickly under complex background. First, this method carries out preprocessing such as the color image grays processing,...
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