Wavelet transform-based simulation study on image features of related rock group sections of Shachang Formation in Miyun Area of Beijing
The Shachang iron deposit is located in the middle part of the northern edge of the North China Platform and the western part of the Yanshantai fold belt.The metamorphic rock types in the region are complex and the main rock formations are characterized by typical regularly arranged textures.For the typical rock sample images,the MATLAB simulation platform was used for research.The grayscale processing,filtering and noise removal,and image enhancement preprocessing methods were used to effectively improve the signal-to-noise ratio of the image and improve the accuracy of subsequent feature extraction.The image was decomposed into three levels by wavelet transform,and the texture local detail features of the"banded"structure rock features,lateral boundary rock features,and"gneissic"structure rock features were analyzed in the wavelet subband diagram.The distribution patterns of the mean,mean proportion,variance and variance proportion feature parameters in each decomposition subband diagram was studied,accurately characterizing the effective features of the magnetite quartzite,copper-bearing quartz vein,and amphibolite gneiss schist section images.The research results can provide certain reference for the construction of regional rock recognition system in the future.
wavelet transformimage processingShachang iron mine areafeature extractionBeijing Miyun
NETL
NSTL
万方数据
