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Fast Fourier Transform is a kind of methods of image processing, which is used in this paper to analyze evolution of patterns observed in dielectric barrier discharge in air/argon. It is found that a new type of pattern named asymmetric hexagon pattern is a kind of superlattice pattern by analyzing the spatial Fourier spectrum. The evolution of the pattern with voltage increasing is not exactly the...
Images of patterns are processed with some image processing technology, such as binary image processing, space correlation function and Fourier transformation, thus some important intrinsic elements of active plasma and pattern formation can be presented more clearly. Images of random filaments, hexagonal, hexagonal superlattice pattern, and chaos state are obtained in dielectric barrier discharge...
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