saving image file using imread

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Sumera Yamin
Sumera Yamin on 16 Apr 2021
Commented: Sumera Yamin on 20 Apr 2021
Hi i try to save an image file but gets the following error. I could not seem to correct it. Any help is appreciated.
imwrite(image,'test.tif');
this is the error
"Writing TIFFs with 30 components is not supported with IMWRITE. Use Tiff instead. Type "help Tiff" for more information.
Error in imwrite (line 472)
feval(fmt_s.write, data, map, filename, paramPairs{:}); "
I tried tosave using other formats like jpg/png then i get following error
"Invalid dimensions for X.
Error in imwrite (line 472)
feval(fmt_s.write, data, map, filename, paramPairs{:}); "
Many thanks.

Answers (2)

Jan
Jan on 16 Apr 2021
The message tells you, that you image has unexpected dimensions. JPG and PNG accept 2D matrices and [M x N x 3] RGB arrays. The 3rd dimension of your image is 30. How did you create it? Why does your image has 30 color channels?
  5 Comments
Rik
Rik on 16 Apr 2021
If you have a list of 2D images (which you have stored in a 3D array for convenience), you should write them as 2D images as well. Only if your 3rd dimension actually encodes something like color should you save the entire array as a hyperspectral/multi-channel image.
Sumera Yamin
Sumera Yamin on 19 Apr 2021
Hi i stored the 3D image into 2D image using
Im=imgage(:,:,n)
Im=Im(:,:)
It still gives me the same error. I think i am not doing it correctly. How can i convert a 3D image into 2D image ?

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Image Analyst
Image Analyst on 16 Apr 2021
There is a special TIFF class that deals with multi-page tiff images. That's what the error was suggesting you use.
>> doc tiff
  3 Comments
Image Analyst
Image Analyst on 19 Apr 2021
I haven't used it either. Call tech support if you can't figure it out. Sorry but I don't have time to figure it out myself and explain it to you - hope you understand.
Sumera Yamin
Sumera Yamin on 20 Apr 2021
thanks for pointing it out

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