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### Highlights from regionprops3

• regionprops3( input, vara...
regionprops3 measures the geometric properties of image objects in
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5.0 | 3 ratings Rate this file 16 Downloads (last 30 days) File Size: 0 Bytes File ID: #47578 Version: 1.3

# regionprops3

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### Joe Yeh (view profile)

16 Aug 2014 (Updated )

Measure geometric properties (e.g. long axis, eccentricity, etc.) of image objects in 3D.

File Information
Description

regionprops3 measures the geometric properties of image objects in 3D space, including 'MajorAxis', 'MajorAxisLength', 'Centroid', 'AllAxes', and 'Eccentricity'.

Acknowledgements

This file inspired Microscopy Image Browser (Mib).

Required Products Image Processing Toolbox
MATLAB release MATLAB 9.1 (R2016b)
12 Oct 2016 Myriam_06

### Myriam_06 (view profile)

Nice work! Like it a lot. But still figuring evertything out.

Maybe a very basic question but: what happens here exactly? What formula is this based on?

distMat = sum(pixs.*repmat(eVectors(:,idx(1))',size(pixs,1),1),2);
output(ii).FirstAxisLength = range(distMat1);

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05 Oct 2016 Luke Xie

nice work

04 Oct 2016 CY Y

### CY Y (view profile)

19 Aug 2016 Joe Yeh

### Joe Yeh (view profile)

@Ganesh, have you checked if your image data contains any NaN or Inf ? Use this to check : any(isnan(img(:))|isinf(img(:))). If the result comes back as one, you'll have to fix that in the image.

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10 Jul 2016 Ganesh P G

### Ganesh P G (view profile)

Can someone help me with this error, please?

"Error using eig
Input to EIG must not contain NaN or Inf.

Error in regionprops3 (line 55)
[eVectors, eValues] = eig(covmat);"

My input for regionprops3 is a 3-D binary image. I removed objects with single pixel, because that was mentioned as a problem. It still gave me the error.

Thanks.

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13 May 2016 Joe Yeh

### Joe Yeh (view profile)

Serdar Yeralan, can you describe the difficulties in more details ? Did you get any error?

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29 Mar 2016 Serdar Yeralan

### Serdar Yeralan (view profile)

I am having difficulties with the function "struct2array" it calls. Any help would be greatly appreciated

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27 Nov 2014 Ilya Belevich

### Ilya Belevich (view profile)

btw, could you please fix the function for the situations when the object consists of a single pixel.
For example,

L = zeros([5,5,5],'uint8');
L(3,3,3) = 1;
result = regionprops3(L, 'Eccentricity');
result = regionprops3(L, 'AllAxes');

thank you!

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26 Nov 2014 Ilya Belevich

### Ilya Belevich (view profile)

Great function, thank you for sharing!

19 Aug 2014 1.1

Summary edited

07 Sep 2014 1.2

Correct a mistake in the previous version and add a few more outputs.

08 Sep 2014 1.3

Correct minor mistake in the function

14 Aug 2016 1.3