To provide a particle size specifying method and a particle size specifying system for granular materials capable of achieving highly accurate particle size specification in a short period of time in specifying particle size in a sample in which granular materials are mixed.
The particle size specifying method for specifying the particle size of the granular materials in the sample, in which the granular materials having various size and shape are mixed, includes: a step of preparing an input image by photographing the sample by an optical system means; a step of preparing a wavelet image by performing a wavelet transform by applying Laplacian-Gaussian function to the input image; a step of preparing a binary image by performing binary processing by applying a preset threshold value to the wavelet image; a step of calculating granular material information consisting of at least the size and the shape of the granular material by using the binary image; and a step of preparing a particle size distribution curve of the sample by using the granular material information.
COPYRIGHT: (C)2011,JPO&INPIT
Tsuyoshi Maruya
Hitoshi Takeda
Masatoshi Eda
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Sekiya Mitsuo
Ishikawa Takiharu