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combining many RGB images into one image

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Nour Mawla
Nour Mawla on 16 May 2015
Commented: Image Analyst on 17 May 2015
good after noon everyone....
I wrote this script that must combines 3 RGB images into one image note that 1.png, 2.png and 3.png are images of same dimentions (500 x 666) I need the final image to show the three images as one image but with reasonable dimensions
Rows = 1;
Cols = 3;
Cell = cell(Rows,Cols);
for i = 1:Rows*Cols
imageName = sprintf('%i.png',i);
imgCell{i} = imread(imageName);
end
bigImage = mat2cell(imgCell);
imshow(bigImage)
However I received this error:
Error using imageDisplayValidateParams
Expected input number 1, I, to be one of these types:
double, single, uint8, uint16, uint32, uint64, int8, int16, int32, int64, logical
Instead its type was cell.
Error in imageDisplayValidateParams (line 11)
validateattributes(common_args.CData, {'numeric','logical'},...
Error in imageDisplayParseInputs (line 78)
common_args = imageDisplayValidateParams(common_args);
Error in imshow (line 219)
[common_args,specific_args] = ...
Error in Untitled3 (line 26)
imshow(bigImage)

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Answers (2)

Image Analyst
Image Analyst on 16 May 2015
What do you want to do? Do you want to average them together? Stitch them side-by-side? Have you seen montage(), imshowpair(), and imfuse()? Explain more what you want to do and I can give a more specific solution.

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Image Analyst
Image Analyst on 16 May 2015
I think your best bet might be montage() though for 100 photos you could run out of memory. If that happens you might have to subsample the images before letting montage() have them.
Nour Mawla
Nour Mawla on 16 May 2015
ok I will try it but please can you tell me why am I receiving the error in the code i wrote? Not just in this function but whenever I try to call an image from a database it pops out
Image Analyst
Image Analyst on 16 May 2015
Because you're passing imshow() a cell array , and in each cell of the array is a chunk of an image - a sub image. imshow() wants the images themselves, directly, it doesn't want a cell array of a bunch of cells that each contain an image. A cell array is like a collection of buckets, and you can thrown whatever you want (images, strings, etc.) into any of the buckets. Please read the FAQ to get a good intuitive feel for what cell arrays are: http://matlab.wikia.com/wiki/FAQ#What_is_a_cell_array.3F

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Oliver Woodford
Oliver Woodford on 16 May 2015
You can display a cell array of images using imdisp.
imdisp(imgCell)

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Nour Mawla
Nour Mawla on 17 May 2015
i got this error Undefined function 'imdisp' for input arguments of type 'cell'.
Image Analyst
Image Analyst on 17 May 2015
I think you may have not visited the link he gave to his File Exchange and downloaded the file. http://www.mathworks.com/matlabcentral/fileexchange/22387-imdisp
Or if you did, you put it somewhere not on the search path.

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