Using haar wavelet transform, the wavelet coefficients extracted their relationship, and then zero-tree coding to achieve compression, decompression Finally, restore the original picture. I conducted a small optimization, very worth learning from.

Packet : 29782194my_ezw_haar.rar filelist
my_EZW_haar\checkancestors1.m
my_EZW_haar\checkchildren.m
my_EZW_haar\checkdescendants1.m
my_EZW_haar\dominantpass.m
my_EZW_haar\mapping.m
my_EZW_haar\sampletest.m
my_EZW_haar\subordinatepass.m
my_EZW_haar\checkdescendants2.m
my_EZW_haar\checkancestors2.m
my_EZW_haar\checkchildren2.m
my_EZW_haar\checkchildren3.m
my_EZW_haar\lena64.bmp
my_EZW_haar\searchset.m
my_EZW_haar

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