How to use imwrite from dicom to png

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mohd akmal masud
mohd akmal masud 2021 年 8 月 23 日
コメント済み: Walter Roberson 2021 年 9 月 2 日
Hi all, I have 4D images. I want to exctract it to png every slice. Below my coding. But Got error. Anyone can help me?
I = dicomread('SPECT BENTUK LIVER.dcm');
I = squeeze(I);
I = uint8(255 * mat2gray( I));
Error using writepng (line 23)
PNG image data must be either MxN or MxNx3.
Error in imwrite (line 566)
feval(fmt_s.write, data, map, filename, paramPairs{:});


Simon Chan
Simon Chan 2021 年 8 月 23 日
It may contains more than one image and hence you need to save it one by one:
Following code for your reference:
[I, cmap] = dicomread('SPECT BENTUK LIVER.dcm');
J = squeeze(I);
[~,~,Nz] = size(J); % Check number of images
for k = 1:Nz
imwrite(J(:,:,k),cmap,sprintf('SPECTbnetukLiver_%02d.png',k)) % Save image one by one
  17 件のコメント
Walter Roberson
Walter Roberson 2021 年 9 月 2 日
szdim = size(A,dim) returns the length of dimension dim when dim is a positive integer scalar. Starting in R2019b, you can also specify dim as a vector of positive integers to query multiple dimension lengths at a time. For example, size(A,[2 3]) returns the lengths of the second and third dimensions of A in the 1-by-2 row vector szdim.
In other words, size(I8,3) is the number of "pages" (third dimension) that I8 has. You said "my image have 128x128x90 uint16" so the third dimension of that woud be 90 .


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