By analysis of sand grain size in sediment microenvironment of modern rivers, the size and shape of grain and surface texture feature of quartz grain were described in this paper.

本文根据现代河流的已知沉积微环境中的砂样分析，阐述了河北平原河流沉积物的粒度成分、形态和石英颗粒的表面结构特征。

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Similarly, the work of texture feature extraction is obtained by using co-occurrence matrix or frequency analysis based on wavelet transform depending on different characteristics of images.

在纹理特征提取方面，针对不同纹理特点分别采用了基于共生矩阵的统计纹理分析和基于小波变换的频谱纹理分析两种方法予以实现。

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The texture feature was obtained by statistically projecting the local centroid which was referred from the structural texture analysis methods based on the wavelet package transform.

该算法以具有多分辨率特性的小波包为基础，结合结构法的纹理元分析方式，采用区域质心完成局部特征提取，最后使用投影法进行整体的特征提取。

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