read Barcode is showing error- Undefined function or variable 'readBarcode'.

clc;
clear;
obj=webcam;
img=snapshot(obj);
msg=readBarcode(img);
disp("message="+msg);

After I tried to run this basic program of barcode reading, I found this error message of [Undefined function or variable 'readBarcode'.]

Now, I want to know, why this error happened and what can be done?

[Kamalin Mastura]

Hi can I know if you successfully done this?

Answer 1

[Star Strider]

According to the documentation, the readBarcode function was introduced in R2020a.

The version posted is R2019a, so to use it, it will be necessary to upgrade to R2020a.

[Jan]

Perfect. I've overseen this detail.

[Star Strider]

Thank you!

Answer 2

[Jan]

Do you have a license for the Computer Vision Toolbox?

[SANDEEP KUMAR SINGH]

how to check that?

I have this Computer Vision Toolbox installed in the matlab.

In 'manage add ons' it is showing that, the computer vision toolbox is installed.

[Jan]

Check this by:

ver

Actually the function should be found, if the toolbox is installed. What does this reply:

which('readBarcode')

[SANDEEP KUMAR SINGH]

Ok, I will try and will get back to you, if the same problem still exists.

[Jan]

Maybe you need to rehash the toolbox cache:

rehash toolboxcache