Morton scanning ?

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vishnu
vishnu 2012-2-29
hi ,
i have to implement the morton scanning .. the idea is
image is to be separated as block and it is to be applied with morton Z scanning . 1& 2& 3 pixel is to be added and 4 th pixel to be divided by above sum .. this repeats further.. i have completed separating as blocks .. but i do not have any idea of that processing . any one help or give suggestions please
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vishnu
vishnu 2012-3-1
i found this function as for morton scanning ..but i don no how to use it for morton scanning .. criteria is i have an image ..divided by 4*4 blocks .. 1 ,2,3 pixels are added and fourth pixel is divided by above sum .. i don no how to use this function ..
function A = mapping(n)
% To create a Morton Scan order matrix
if n == 2
A = [1 2; 3 4];
else
B = mapping(n/2);
A = [B B+(n/2)^2; B+(n/2)^2*2 B+(n/2)^2*3];
end

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回答（1 个）

vishnu
vishnu 2012-3-1
i found out this as for 4*4 matrix from matlab central
clc;
clear all;
close all ;
n=2;
ind=morton(n);
a=reshape(1:4^n,2^n,2^n);
disp(a)
here is the matlab function
function ind=morton(n); % MORTON(N) return the morton permutation order for array of size 2^N % e.g. % n=2; % matrix size is 2^n % ind=morton(n); % d=fix(rand(2^n,2^n)*10); % disp(d) % disp(d(ind))
linind4=(1:4^n)-1; %start index count for array at zero
ind4str=dec2base(linind4,4); %convert indices to base-4
b1=dec2bin(str2num(ind4str(:,1))); %split each base-4 into two base-2numbers
b2=dec2bin(str2num(ind4str(:,2)));
rb=[b1(:,1) b2(:,1)]; %the rows are given by the first bits of b1 and
b2
cb=[b1(:,2) b2(:,2)]; %the columns are given by the second bits of b1 and b2
r=bin2dec(rb)+1; %convert the row from bit to decimal
c=bin2dec(cb)+1; %convert column
ind=[2^n*(c-1)+r]'; %make a linear row index into array for easyaddressing
%morton.m ends
----------------------------------------------------
i require to do this for whole image with out looping infinitly ..
can you please any one give the way by bolck processing
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vishnu
vishnu 2012-3-1
how to do it for whole image for this 4*4 block coding ? can any one help please ..

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