function y=mapping_128
% x : Transformed Image
% y : Row vector ( mapped ), Scanning order is RASTER SCAN
LL3=reshape([1:16*16],16,16)';
temp=[LL3 LL3+256;LL3+512 LL3+768];
temp=[temp reshape([1025:2048],32,32)';reshape([2049:3072],32,32)' reshape([3073:4096],32,32)'];
temp=[temp reshape([4097:8192],64,64)';reshape([8193:12288],64,64)' reshape([12289:16384],64,64)'];
y=temp;