how can I convert 2d images to a 3d image?

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sara 2014-9-14

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/154714-how-can-i-convert-2d-images-to-a-3d-image

编辑： Walter Roberson 2022-1-24

采纳的回答： Image Analyst

I have a CT scan file with 51 slices...how can I make a 3d image with this 51 slices?

Is there any toolbox in matlab for this?

I attached this file.

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sara 2014-9-15

fourth

Walter Roberson 2015-10-14

The 4th did not get attached.

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采纳的回答

Image Analyst 2014-9-14

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/154714-how-can-i-convert-2d-images-to-a-3d-image#answer_151649

在 MATLAB Online 中打开

You can use cat()

image3d = cat(3, slice1, slice2, slice3, slice4);

or in a loop where you read in each slice

array3d = zeros(rows, columns, numberOfSlices);
for slice = 1 : numberOfSlices
  filename = spritnf('image #%d', slice);
  fullFileName = fullfile(folder, filename);
  if exist(fullFileName, 'file)
    thisSlice = imread(fullFileName);
    array3d(:,:,slice) = thisSlice;
  end
end

or if you don't know the number of slices in advance,

thisSlice = imread(filename);
if slice == 1
  array3d = thisSlice
else
  array3d = cat(3, array3d, thisSlice);
end

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Nawal SRHIRI 2019-4-15

编辑：Nawal SRHIRI 2019-4-15

在 MATLAB Online 中打开

Image Analyst

using this code :

% Read in demo image.
grayImage = imread(fullFileName);
% Get the dimensions of the image.
[rows, columns, numberOfColorChannels] = size(grayImage)
if numberOfColorChannels > 1
	grayImage = grayImage(:, :, 1);
end

I have the following error:

Error using imread (line 347)

Cannot open file "C:\Users\User\Desktop\PFE\pro" for reading. You might not have read permission.

then i try this cod:

image_folder ='C:\Users\User\Desktop\PFE\base de données\DICOM\PA0\ST0\SE5';
filenames = dir(fullfile(image_folder, '*.jpg'));
% Get the dimensions of the image.
[rows, columns, numberOfColorChannels] = size(filenames)
if numberOfColorChannels > 1
	grayImage = grayImage(:, :, 1);
end

>> cat(3,1,2,3,4,5,6,7,8,9);

but I can not build a 3d image

using this:

>> cat(3,1.jpg,2.jpg,3.jpg,4.jpg,5.jpg,6.jpg,7.jpg,8.jpg,9.jpg);

cat(3,1.jpg,2.jpg,3.jpg,4.jpg,5.jpg,6.jpg,7.jpg,8.jpg,9.jpg);

I have this :

Error: Unexpected MATLAB expression.

Did you mean:

>> cat(3,1.j*pcg,2.j*pcg,3.j*pcg,4.j*pcg,5.j*pcg,6.j*pcg,7.j*pcg,8.j*pcg,9.j*pcg);

Error using pcg (line 60)

Not enough input arguments.

Patil Ravindra kyung hee university 2021-9-9

编辑：Walter Roberson 2022-1-24

在 MATLAB Online 中打开

@Image Analyst

thank you for reply sir,

i tried imrotate fuction as you said but it showing some error. please check it and tell me corrections.

a=imread('D:\im\New folder\1.jpg');
a=imresize(a,[128 128]);
a = imrotate(a, 30, 'bbox', 'crop'); % Rotate by 30 degrees.
b=imread('D:\im\New folder\2.jpg');
b=imresize(b,[128 128]);
b = imrotate(b, 60, 'bbox', 'crop'); % Rotate by 30 degrees.
c=imread('D:\im\New folder\3.jpg');
c=imresize(c,[128 128]);
c = imrotate(c, 90, 'bbox', 'crop'); % Rotate by 30 degrees.
d=imread('D:\im\New folder\4.jpg');
d=imresize(d,[128 128]);
d = imrotate(d, 120, 'bbox', 'crop'); % Rotate by 30 degrees.
e=imread('D:\im\New folder\5.jpg');
e=imresize(e,[128 128]);
e = imrotate(e, 150, 'bbox', 'crop'); % Rotate by 30 degrees.
f=imread('D:\im\New folder\6.jpg');
f=imresize(f,[128 128]);
f = imrotate(f, 180, 'bbox', 'crop'); % Rotate by 30 degrees.
g=imread('D:\im\New folder\7.jpg');
g=imresize(g,[128 128]);
g = imrotate(g, 210, 'bbox', 'crop'); % Rotate by 30 degrees.
h=imread('D:\im\New folder\8.jpg');
h=imresize(h,[128 128]);
h = imrotate(h, 240, 'bbox', 'crop'); % Rotate by 30 degrees.
i=imread('D:\im\New folder\9.jpg');
i=imresize(i,[128 128]);
i = imrotate(i, 270, 'bbox', 'crop'); % Rotate by 30 degrees.
j=imread('D:\im\New folder\10.jpg');
j=imresize(j,[128 128]);
j = imrotate(j, 300, 'bbox', 'crop'); % Rotate by 30 degrees.
k=imread('D:\im\New folder\11.jpg');
k=imresize(k,[128 128]);
k = imrotate(k, 330, 'bbox', 'crop'); % Rotate by 30 degrees.
l=imread('D:\im\New folder\12.jpg');
l=imresize(l,[128 128]);
l = imrotate(l, 360, 'bbox', 'crop'); % Rotate by 30 degrees.
im = cat(3,a,b,c,d,e,f,g,h,i,j,k,l);
vol3d('cdata', squeeze(im), 'xdata', [0 1], 'ydata', [0 1], 'zdata', [0 1]);

this is code and the error is :-

>> vol3d

Error using imrotate>checkStringValidity (line 312)

Unknown interpolation method or BBOX: bbox

Error in imrotate>parse_inputs (line 277)

checkStringValidity(idx1,arg1);

Error in imrotate (line 69)

[A,ang,method,bbox,catConverter,isInputCategorical] = parse_inputs(args{:});

Error in vol3d>demo_vol3d (line 226)

a = imrotate(a, 30, 'bbox', 'crop'); % Rotate by 30 degrees.

Error in vol3d (line 74)

demo_vol3d;

thank you for help.

Patil Ravindra kyung hee university 2021-9-9

@Walter Roberson,@Image Analyst

thank you for help,i tried 'nearest ' the error is solve but it still staging all images.

it just rotate iamge but all images are stagging on each other.

my images are like a tomography images. in tomography we take images in diffrent angle and combine them to create 3D volume. like shown in below video.

"https://youtu.be/1gottjkU6Jc"

again thank you for help these are great help to me in my work.

Image Analyst 2021-9-9

编辑：Walter Roberson 2022-1-24

Patil, if you've studied medical reconstruction you know a reconstructed image is not merely the sum of rotates images. You have to extrude or "back project" the images before you add them. You are not doing that part so you will not get a reconstruction. Sorry, but writing a 3-D reconstruction algorithm is way beyond what I can offer you. There are people who's whole full time job is working on those kinds of algorithms.

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