Perhaps the positions of the three pyramidical images in the crystal sphere hold the long-sought key to finding a fourth, as yet unfound. 也许在水晶球体三个金字塔形图像的位置持有苦苦寻找发现第四个金字塔的钥匙,目前为止还没有发现。
Deep inside the crystal form, one gazes upon three pyramidical images, one in front of the other, in decreasing sizes. 深深凝视水晶球内部就会出现三个金字塔图像,其中一个在另两个的前面,体积小一些。
The pyramidical Mallat algorithm of orthogonal dyadic wavelet transformation and its application in a wavelet based integrated filter were introduced. 本文介绍了二进正交小波变换的快速算法在基于小波变换的组合滤波器中的应用。