备忘2

1. discrete wavelet analysis transforms are equal to  filtering processes with downsampling. And discrete wavelet synthesis transforms are equal to the plus of  tow sets of filtering processes with upsampling. So we can consider the image processing as some filtering processes.

2. the most important points in Data Order are (tcx0,tcy0) and (tcx1,tcy1), once they are specified, the (trx0,try0), (tbx0, trb0) can be fixed. Resolution and subband are harve their own canvas, the precinct must be the integer multiple of code blocks,