The program is the SPIHT image compression algorithm, the specific function content.m see inside documents, in more detail

Packet : 105230323spihtprogramming.rar filelist
SPIHT算法源程序
SPIHT算法源程序\contents.m
SPIHT算法源程序\func_DWT.m
SPIHT算法源程序\func_InvDWT.m
SPIHT算法源程序\func_Myappcoef2.m
SPIHT算法源程序\func_MyDescendant.m
SPIHT算法源程序\func_MyMax.m
SPIHT算法源程序\func_Mywavedec2.m
SPIHT算法源程序\func_Mywaverec2.m
SPIHT算法源程序\func_ReadRaw.m
SPIHT算法源程序\func_SPIHT_Dec.m
SPIHT算法源程序\func_SPIHT_Enc.m
SPIHT算法源程序\func_SPIHT_Main.m
SPIHT算法源程序\lena512.raw

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