The proposed transform could represent the geometrical features such as edges and texture more sparsely, which is of great benefit to image compression.
多方向多尺度变换能以更稀疏的方式表示图像的边缘和纹理等几何特征，有利于图像压缩。
In order to support the whole process of design activities, a hierarchical model to represent the functional and geometrical information of welded machine frame is presented.
通过建立一个基于层次数据结构的焊接机架表示模型，表示焊接机架的功能信息和几何信息，以支持焊接机架全过程的设计活动。
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