The angle of the least inertia moment axis of grey scale image is an important shape feature in digital image analysis.
惯性主轴的方向是数字图象分析中重要的形状特征之一。
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。
Based on overall analysis of apple shape, originally, the reference shape method was used in apple shape feature extraction.
首次将参考形状分析法用于果形判别，利用人工神经网络对果形进行识别和分级。
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