blood vessel segmentation in retinal images

can anyone help me on this error

Answer 1

[Rik]

You ran the function without any inputs. You will have to call it with an input, e.g. like this:

IM=imread(fullfile('Test Images','5_left.jpg'));
level=Threshold_Level(IM);

[Aravindnath Reddy]

yes but again its getting an error pls solve this for me thanks for your reply

[Rik]

No, you changed the function file, not how you call it. You see in the command window how you're calling the function: still without any inputs.

You should really consider a basic Matlab tutorial. Matlab is not like MS Paint, where you can just start and expect everything to work as expected. It is a powerfull tool. It will be extremely difficult (if not impossible) to just start using it without learning it.

[Aravindnath Reddy]

Any way thanks for your advice 👍

[Rik]

You're welcome. If it solved your issue, please consider marking my answer as accepted. If not, feel free to post a comment with your remaining issues.