How to use imwrite from dicom to png

9 次查看（过去 30 天）

显示更早的评论

mohd akmal masud 2021-8-23

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1438654-how-to-use-imwrite-from-dicom-to-png

评论： Walter Roberson 2021-9-2

采纳的回答： Simon Chan

在 MATLAB Online 中打开

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)); 
imwrite(I,'SPECTbnetukLiver.png');

ERROR

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{:});

采纳的回答

Simon Chan 2021-8-23

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1438654-how-to-use-imwrite-from-dicom-to-png#answer_772519

在 MATLAB Online 中打开

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
end

17 个评论
显示 15更早的评论隐藏 15更早的评论

mohd akmal masud 2021-9-1

在 MATLAB Online 中打开

in your code,

for k = 1 : size(I8,3)
end

what is 3?

Walter Roberson 2021-9-2

https://www.mathworks.com/help/matlab/ref/size.html

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 .

请先登录，再进行评论。