HI All ,Here i want to Reshape 2D images into 1D image vectors , why i get this error ? Error using '?? Transpose on ND array is not defined. Error in testauto (line 14) temp = reshape(img',r*c,1); .please help its urgent Thanks.

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clear all close all clc
path = dir('e:\testImage\*.png'); X = [];
n = length(path);
for i = 1 : n
file = strcat('e:\testImage\',path(i).name);
img = imread(file);
% figure,imshow(img);
[r,c] = size(img);
temp = reshape(img',r*c,1);
X = [X temp];
end
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Accepted Answer

Ahmet Cecen
Ahmet Cecen on 28 Dec 2016
Not enough information, but it is likely that the image you are reading is a color image and is actually r by c by 3. I will also speculate you probably want to do:
img = rgb2gray(img);
  4 Comments
Jan
Jan on 28 Dec 2016
When this is your purpose, "[X temp]" might not be useful. When the images have different sizes, this command must fail in addition.
Enayat Ansari
Enayat Ansari on 28 Dec 2016
so what is the right way to store temp(which is now 1D array) into a matrix.help me i am pretty beginner

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More Answers (1)

Greg
Greg on 28 Dec 2016
The error tells you exactly where the problem is: transposing an ND array on line 14. More specifically, the single tick (') operator is matrix transpose. Replace "img'" with "img". temp = reshape(img',r*c,1);
Better way to convert ANYTHING into a single column vector is "temp = img(:);"

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