The functions of MATLAB in image processing and numerical calculation were am— ployed to process the images of atmosphere sniffable particles obtained by the field emission scanning electron microscope (FESEM )。W ith the M ATLAB program，the binary images of the particles border were acquired，the numbers of a series of square blocks whose lengths were different pixel quantities to cover the binary image were counted，and the box-counting di— mensions of these images were calculated according to the mathematics relationship of the pixel quantities and the numbers of square blocks．The results showed that the processing of fractal images by M ATLAB is simple and convenient，and the calculating results of fractal dimensions tested by some fractal curves such as the Koch curve and the Sierpinski gasket are accurate and believable The particles with different irregularities have different fractal dimensions，and the sources and transport processes of particles can be indicated by their

Estimation of Fractal Dimensions.pdf

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