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Due to simplicity, hybridization of geometrical optics (GO) and physical optics (PO) based on ray tracing has been widely used for fast scattering analyses. However, when targets of curved concavities are discretized by flat facets, the loss of divergence factor (DF) will degrade the simulation accuracy. To remedy this loss, a simple and efficient factor, entitled virtual divergence factor (VDF),...
It introduced the principle and the process of human face detection algorithm, as well as its implementation and optimization using DSP. It applied AdaBoost algorithm to detect human face. Before the detection, some methods were used to optimize original image data, such as image scale, median filter, histogram equalization and edge detection. After the detection, it judged and modified the results...
Support Vector Machines (SVM) are very powerful classifiers in theory but their efficiency in practice rely on an optimal selection of hyper-parameters. This paper proposes an image classifier based on Support Vector Machine which related parameters are optimized by an improved Particle Swarm Optimization (PSO) algorithm. Because control parameters selection of PSO have no corresponding theoretical...
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