column shuffling of a matrix

2 vues (au cours des 30 derniers jours)
shivani
shivani le 12 Mar 2015
Modifié(e) : Andrei Bobrov le 12 Mar 2015
Please let me know if i want column shuffling instead of rows what changes i must need in this code.
% for the color image, for even rows and cols
% Need to perform switching of rows at each channel
A = imread('Untitled.png');
[m, n, c] = size(A);
temp= zeros(m,n);
for i = 1 : c
A1 = A(:, :, i);
a1 = A1(1 : m/2, :);
a2 = A1(end: -1 : m/2+1, :);
temp(1:2:end,:) = a1;
temp(2:2:end,:) = a2;
A(:, :, i) = temp;
end

Réponse acceptée

Andrei Bobrov
Andrei Bobrov le 12 Mar 2015
Modifié(e) : Andrei Bobrov le 12 Mar 2015
A = imread('Untitled.png');
m = size(A);
out = zeros(m);
m1 = round(m(2)/2);
out(:,1:2:end,:) = A(:,1:m1,:);
out(:,2:2:end,:) = A(:,end:-1:m1+1,:);

Plus de réponses (1)

Michael Haderlein
Michael Haderlein le 12 Mar 2015
Modifié(e) : Guillaume le 12 Mar 2015
Please use the {}Code button to make your code readable.
If this code is sorting the rows in the manner you want, you can change it to do the same with columns this way:
A = imread('Untitled.png');
[m, n, c] = size(A);
temp= zeros(m,n);
for i = 1 : c
A1 = A(:, :, i);
a1 = A1(:, 1 : n/2);
a2 = A1(:, end: -1 : n/2+1);
temp(:, 1:2:end) = a1;
temp(:, 2:2:end) = a2;
A(:, :, i) = temp;
end

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