Calculate the measurements of a Binary Image with an ndims of 3

Question

Ryan Tigera 2020-11-16

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/649318-calculate-the-measurements-of-a-binary-image-with-an-ndims-of-3

评论： Ryan Tigera 2020-11-19

A,T=8min,V=40mL,TR.JPG

I am analyzing a series of images that increase the volume of the yellow plume over a series of time steps. My goal is to compare the area, centroid, outline and lengths of the largest finger of each yellow plume with other similiar images in a table as well as have MATLAB show the centroid and extrema on the image. In order to measure these properties, Matlab states I need a ndims of 2 or less where my binary image is 3. I used the imbinarize command to create a binary image and I recieved this error using regionprops.

An example of the photo to be analyzed is attached to this post.

Thanks for your help.

Ryan

2 个评论
显示无隐藏无

Rik 2020-11-16

Did you convert the RGB image to grayscale before binarizing?

Ryan Tigera 2020-11-19

Hi Rik,

Thanks for the help. In reviewing my code, I skipped this step.

Thanks again for your help.

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Shashank Gupta 2020-11-19

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/649318-calculate-the-measurements-of-a-binary-image-with-an-ndims-of-3#answer_549583

编辑：Shashank Gupta 2020-11-19

在 MATLAB Online 中打开

Hey Ryan,

you might need to convert your RGB image to Gray image first and then binarize it, this will make sure you have ndim equals to 2. Attaching a small piece of code for your referece.

% Read image
img = imread('A,T=8min,V=40mL,TR.JPG');
% Convert RGB to gray.
im = rgb2gray(img);
% Binarize.
im = imbinarize(im);
% Use regionprop function according to your necessity.
stats = regionprops('table',im,'Centroid',...
'MajorAxisLength','MinorAxisLength')