Fast Implementation of the Subband Weighting for 3D Wavelet Coding
Figure 4
An example of the arraylist representation. The matrix is in (5). According to whether row (above) or column (below) is considered first, the arraylist representation can be categorized into row representation and column representation. The arraylists in the left are used to store the locations of nonzero coefficients, and the arraylists in the right are used to store the values of nonzero coefficients.