Digital Image Analysis of Complex Periodical Viral Structures
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Structures with two-dimensional translation symmetry are common among viruses. Digital image processing techniques can be used to study their electron micrographs, filtering the periodic structure from the non-periodic noise. We outline in section 2 the method that gives the best results, consisting of the transformation of the image to get its digital Fourier transform (DFT) matched to a pre-defined theoretic lattice-pass filter . In section 3 we extend this technique to the case in which we have two periodic layers producing a moiré pattern that, in the usual presence of heavy noise, is nearly impossible to interpret by simple visual inspection. We apply this method in section 4 to the study of the capsid of the African Swine Fever virus.
KeywordsDigital Image Analysis African Swine Fever African Swine Fever Virus Periodic Layer Reciprocal Lattice Point
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