listorder.m

EZW的matlab程序 基于小波变换对图像进行压缩编码的研究

function lsorder=listorder(mr,mc,pr,pc)

lso=[pr,pc;pr,pc+mc/2;pr+mr/2,pc;pr+mr/2,pc+mc/2];
mr=mr/2;mc=mc/2;
lm1=[];lm2=[];lm3=[];lm4=[];
if (mr>1)&&(mc>1)
    ls1=listorder(mr,mc,lso(1,1),lso(1,2));
    lm1=[lm1;ls1];
    ls2=listorder(mr,mc,lso(2,1),lso(2,2));
    lm2=[lm2;ls2];
    ls3=listorder(mr,mc,lso(3,1),lso(3,2));
    lm3=[lm3;ls3];
    ls4=listorder(mr,mc,lso(4,1),lso(4,2));
    lm4=[lm4;ls4];
end
lsorder=[lso;lm1;lm2;lm3;lm4];
len=length(lsorder);
lsorder=lsorder(len-mr*mc*4+1:len,1:2);