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Edge detection is an active and critical topic in the field of image processing, and plays a vital role for some important applications such as image segmentation, pattern classification, object tracking etc. In this paper, an approach using varied local edge pattern descriptor is proposed for edge detection. This method contains the following steps: firstly, Gaussian filter is used to smooth the...
RF and microwave networks are often characterized using scattering or S-parameters. The S-parameters of a network provide a clear physical interpretation of the transmission and reflection performance of devices. Vector-network-analyzer can measure S-parameters rapidly with a great accuracy. When a calibration has been performed, we need to use verification kits to check the performance of the VNA...
The firefly algorithm is a stochastic meta-heuristic algorithm that incorporates randomness into a search process. In essence, the randomness is useful when determining the next point in the search space and therefore has a crucial impact when exploring the new solution. Simultaneously, randomized mechanism plays an important role in balance the exploration and exploitation during the process. In...
As a 3D video extension of Audio Video Coding Standard (AVS), 3D-AVS is being developed to improve the coding efficiency of multi-view video. Since multi-view video is composed of projections of the same scenery from different viewpoints at the same time instant, it contains a large amount of inter-view redundancies. To exploit the inter-view correlation, this paper presents a method to derive the...
There are two X-band ripples horn single-lens antennas, waveguide transmission segment, fixture, a mounting station, an Agilent N5225A network analyzer and a computer in the free-space measurement system of 8GHz∼40GHz frequency range. S11 and S21 of sample measured by network analyzer are used to calculate the dielectric constant. A dual calibration technique of SOLT and GRL is used to eliminate errors...
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