Can anyone help me to solve this error in regionprops().

This is the code.The stats is a table, in that MajorAxisLength() and MinorAxisLength() is showing as 0*0 (double)

gray = imread('CYST RENAL-37.jpg');
grayImage = rgb2gray(gray);
level = graythresh(gray);
BW = imbinarize(gray,level);
stats = regionprops('table',BW,'Centroid',...
    'MajorAxisLength','MinorAxisLength');
centers = stats.Centroid;
diameters = mean([stats.MajorAxisLength stats.MinorAxisLength],2);
radii = diameters/2;

Pls help me to solve this error. Any help is appreciated

[Matt J]

We can't run your code without 'CYST RENAL-37.jpg'

[Walter Roberson]

Also I wonder if using "equivalent diameter" property would happen to be appropriate for your case.

[MINO GEORGE]

Thank you for responding.

I need to segment the cyst region (black hole) from the kidney ultrasound image. The image is attached here. When i execute this code, i am getting these many errors.

Error using sum

Invalid data type. First argument must be numeric or logical.

Error in mean (line 127)

y = sum(x, dim, flag) ./ mysize(x,dim);

Error in subtract (line 13)

diameters = mean([stats.MajorAxisLength stats.MinorAxisLength],2);

Thanks for the help

Answer 1

[Walter Roberson]

gray = imread('CYST RENAL-37.jpg');
grayImage = rgb2gray(gray);
BW = imbinarize(grayImage);
stats = regionprops('table',BW,'Centroid',...
    'MajorAxisLength','MinorAxisLength');
centers = stats.Centroid;
diameters = mean([stats.MajorAxisLength stats.MinorAxisLength],2);
radii = diameters/2;

You were trying to imbinarize() the RGB image, not the gray image.

Also, imbinarize() automatically determines the threshold by calling graythresh if you do not pass in a level.