Laboratory test research on dry density discrimination of granite residual soil based on digital image technology

Based on the analysis of the relationship between soil dry density and porosity, and based on the research of digital image processing technology, this paper proposes a laboratory test method for judging the dry density of granite residual soil. Through the grayscale, binarization and contour identification of soil sample pore image, the quantitative analysis method of soil sample pore image is studied, and a statistical discriminant model with void area and pore proportion as parameters is established, and the laboratory test is realized. The determination of the dry density of coarse-grained soil under the conditions provides a new way for the application of digital image method in the detection of soil dry density.