WAVETRANS2 - 2D wavelet transform by tensor-product of two 1D transforms Function Prototype: int waveTrans_2(float **x, float **y, waveFilter *filter, int twopow1, int twopow2, int stage1, int stage2, int type); Input: x array[][] for the signal y array[][] for the wavelet coefficients filter wavelet filter structure twopow1 2^pow1 is the length of the signal along 1st dimension twopow2 2^pow2 is the length of the signal along 2nd dimension stage1 stage of decomposition along 1st dimension stage2 stage of decomposition along 2nd dimension type 0 for decomposition, 1 for reconstruction Author: Tong Chen, 04/12/95