What wrong in EDGE in matlab?

Hi, I have code.

I = imread(filename);
BW = edge(I,'canny');

But I receive error : Undefined function or variable 'edge'. I just try :

BW = edges(I,'canny');

Error : Undefined function 'edges' for input arguments of type 'uint8'. My matlab version : 2015a. I don't know how to fix it. Please help me !

Answer 1

[Walter Roberson]

edge() is part of the Image Processing Toolbox. You need to have that toolbox licensed and installed in order to use it. (If you have a Student license then you need to go back into the installer and ask for Image Processing to be installed.)

[Yao To]

Thanks Walter, I got it !

[munira]

how can I fix this error, do I need to download something? if yes, what iit is?

[Steven Lord]

As Walter said, the edge function is part of Image Processing Toolbox. Check the output of the ver function. If that output does not list "Image Processing Toolbox" you do not have this toolbox installed and will not be able to use this function until or unless you do.