jvector.m

基于图象的数据隐写和提取matlab代码

function B= jvector(A)
%This takes the 8x8 matrix and converts it to a string which groups the
%zeros together for quick compression
%this traversal is done in the same way JPEG compresses
rows= [1 1 2 3 2 1 1 2 3 4 5 4 3 2 1 1 2 3 4 5 6 7 6 5 4 3 2 1 1 2 3 4 5 6 7 8 8 7 6 5 4 3 2 3 4 5 6 7 8 8 7 6 5 4 5 6 7 8 8 7 6 7 8 8];
colm= [1 2 1 1 2 3 4 3 2 1 1 2 3 4 5 6 5 4 3 2 1 1 2 3 4 5 6 7 8 7 6 5 4 3 2 1 2 3 4 5 6 7 8 8 7 6 5 4 3 4 5 6 7 8 8 7 6 5 6 7 8 8 7 8];


for i=1:64
        B(i)=A(rows(i), colm(i));
end