How to use regionprops in matlab?

I have writen a code like this to calculate the mean intensity of my masked image, but it keeps having errors saying that 'regionprops' require Image Process Toolbox.

May I ask what went wrong with this code?

[Walter Roberson]

.. Do you indeed have Image Processing Toolbox licensed and installed?

[Yuhong Jin]

Yes I think my college provide me the licenses for this toolbox and I just installed Matlab onto my PC.

[Walter Roberson]

What shows up for

ver('images')
license('test','Image_Toolbox')

[Yuhong Jin]

version is R2019b And license answer is 1

[Walter Roberson]

When you did the ver() test then did you see

Image Processing Toolbox                              Version 11.0        (R2019b)

[Yuhong Jin]

I got

9.7.0.1216025 (R2019b) Update 1

[Walter Roberson]

This is what it should look like if you have the software installed:

>> ver('images')
-----------------------------------------------------------------------------------------------------
MATLAB Version: 9.7.0.1216025 (R2019b) Update 1
MATLAB License Number: XXXXXXX
Operating System: Mac OS X  Version: 10.13.6 Build: 17G9016 
Java Version: Java 1.8.0_202-b08 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode
-----------------------------------------------------------------------------------------------------
Image Processing Toolbox                              Version 11.0        (R2019b)

If you do not see the Image Processing Toolbox line then you do not have the software installed.

In the command window click on Add-Ons -> Get Add-Ons . In the window that comes up ask to search for Image Processing Toolbox. Click on the first result. In the detailed page that comes up, over to the right hand side near the top, click on Install .

Note: you will be required to shut down MATLAB for the install to proceed.

[Yuhong Jin]

thank you so much

Answer 1

[Image Analyst]

Try this:

% Check that user has the specified Toolbox installed and licensed.
hasLicenseForToolbox = license('test', 'image_toolbox');	% Check for Image Processing Toolbox.
% hasLicenseForToolbox = license('test','Statistics_toolbox');	% Check for Statistics and Machine Learning Toolbox.
% hasLicenseForToolbox = license('test','Signal_toolbox');	% Check for Signal Processing Toolbox.
% hasLicenseForToolbox = license('test', 'video_and_image_blockset');	% Check for Computer Vision System Toolbox.
if ~hasLicenseForToolbox
	% User does not have the toolbox installed, or if it is, there is no available license for it.
	% For example, there is a pool of 10 licenses and all 10 have been checked out by other people already.
	ver % List what toolboxes the user has licenses available for.
	message = sprintf('Sorry, but you do not seem to have the Image Processing Toolbox.\nDo you want to try to continue anyway?');
	reply = questdlg(message, 'Toolbox missing', 'Yes', 'No', 'Yes');
	if strcmpi(reply, 'No')
		% User said No, so exit.
		return;
	end
end