# How to display a 2D square as a 3D cube

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Elysi Cochin 2022 年 3 月 19 日

How can i display the attached 2D square input as a 3D cube from?
I used the same image in all slice. But the display is not clear.
Please can someone help me with displaying

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### 採用された回答

Abolfazl Chaman Motlagh 2022 年 3 月 19 日

Use volshow function :
thisSlice = double(thisSlice);
thisSlice = (thisSlice-min(thisSlice(:)))/(max(thisSlice(:))-min(thisSlice(:)));
thisSlice = uint8(255*thisSlice);
volSlice = repmat(thisSlice,[1,1,100]);
queryPoints = 0:255;
alpha = [0 0.01 0.02 .05 0.9];
intensity = linspace(0,255,5);
alphamap = interp1(intensity,alpha,queryPoints)';
volshow(volSlice,'Alphamap',alphamap)
change Alphamap and Colormap option of volshow to have better representation for your application. there is a simple example in documentation of dicomreadvolume in MATLAB documentation.
the image in final step :
3D volumetric plot :
##### 4 件のコメント表示非表示 3 件の古いコメント
Abolfazl Chaman Motlagh 2022 年 3 月 20 日
as i said earlier, you can change alphamap and colormap to see what is best illustration for your work.
for example if you don't use any option even dark pixels have intensity in volumentric figure:
volshow(volSlice)
but for example a little more precise number would be this: (i see that most pixel in box have intensity grater than 130 in 8bit image so i did this:)
queryPoints = 0:255;
alpha = [0 0.01 0.02 .6 1 1];
intensity = [0 50 100 130 200 255];
alphamap = interp1(intensity,alpha,queryPoints)';
volshow(volSlice,'Alphamap',alphamap)

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