I want a matrix to be represented in the form of an array

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akash bais 2016-12-22

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编辑： Roger Stafford 2016-12-22

I want a image matrix 512x512 to be represented in the array form or simply in a straight line while scanning the matrix in inverse S way. I have attached an image to make it clear

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David Barry 2016-12-22

There is no image attached.

akash bais 2016-12-22

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Answer 1

Roger Stafford 2016-12-22

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编辑：Roger Stafford 2016-12-22

在 MATLAB Online 中打开

Here are the “Pixel Scan” and “Rearrange” operations:

% Let M be the m by n image matrix
% Pixel Scan:
M = M.';
M(:,2:2:end) = flipud(M(:,2:2:end)); % Flip even columns
M = M(:);  % The result is a column vector

Then perform the “Difference computation”, the “Histogram shifting” and the “Embedding” on M.

% Now M is still a column vector
% Rearrange:
M = reshape(M,n,m); % <-- Note the reversal of sizes here
M(:,2:2:end) = flipud(M(:,2:2:end));  % Flip even columns
M = M.';
% M is again an m by n image matrix.

The "Difference computation" is an obvious use of the ‘diff’ function. I have no idea how to do the “Histogram shifting” or the “Embedding”.