How to convert images to vectors

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M 2023-10-17

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2034594-how-to-convert-images-to-vectors

评论： Walter Roberson 2023-10-17

采纳的回答： Dyuman Joshi

How can I convert my images with size 120 160 1 888 to vectors ?

where 120* 160 is the size of each gray scale image, 1 is the number of channels, 888 is the number of images

so the output will be matrix and each column in the matrix is an image, I should end up with 888 vectors each vector is image

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采纳的回答

Dyuman Joshi 2023-10-17

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2034594-how-to-convert-images-to-vectors#answer_1334639

在 MATLAB Online 中打开

From what I have understood -

%Random input
in = rand(120,160,1,888);
s = size(in);
%Convert the input to a cell vector
out = mat2cell(in,s(1),s(2),s(3),ones(1,s(4)));
size(out)
ans = 1×4
     1     1     1   888
%Modify the size of the output 
out = squeeze(out)
out = 888×1 cell array
    {120×160 double}
    {120×160 double}
    {120×160 double}
    {120×160 double}
    {120×160 double}
    {120×160 double}
    {120×160 double}
    {120×160 double}
    {120×160 double}
    {120×160 double}
    {120×160 double}
    {120×160 double}
    {120×160 double}
    {120×160 double}
    {120×160 double}
    {120×160 double}

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Dyuman Joshi 2023-10-17

@M, I have edited my response, please check above.

Walter Roberson 2023-10-17

在 MATLAB Online 中打开

in = rand(120,160,1,888);
s = size(in);
out = cell2mat(squeeze(cellfun(@(P) P(:), num2cell(in, 2),'uniform', 0)));
whos out
  Name          Size                 Bytes  Class     Attributes

  out       19200x888            136396800  double              