Abstract:

On the basis of twodirection wavelet theory, a fourdirection wavelet with tectonic scale a was constructed by tensor product. Moreover, MRA, orthogonal and biorthogonal conditions of this twodimensional wavelet were given, and the relevant properties of this twodimensional wavelet
 were shown in the conclusion.

Key words: fourdirection twodimensional to wavelet, biorthogonal, multiresolution analysis, two scaling equations, refine mask