principal components analysis短语¹⁴⁴⁹⁷²⁺² 基本例句 主成分分析 The foot- length and foot- breadth of single- footprint are extracted uniquely by making use of Principal Components Analysis PCA of Digital Image Processing in this paper. 采用数字图像处理的 PCA方法唯一地提取了单足足迹的足长和足宽。 dictall