How can I use the IMREAD function with a URL that requires basic authentication in MATLAB 2014a??? (not the old matlab)

I want to access ip-camera images using imread , but due to authentication, it is unaccessable. so please help.

Answer 1

[Cairo L. Nascimento Jr.]

I have tested the following solution in MATLAB R2013a and R2014b. I guess it should work in the MATLAB releases after R2013a.

1) For your specific IP camera model, find the HTTP/CGI command to grab the current camera image (snapshot) with basic authentication turned OFF.

Each camera manufacturer use a different command. You may have to search the manufacturer's website or use Google to find this information.

Some examples:

    AXIS: http://{ip_address}:{port}/axis-cgi/jpg/image.cgi
    LINKSYS: http://{ip_address}:{port}/img/snapshot.cgi
    TRENDnet: http://{ip_address}:{port}/cgi/jpg/image.cgi
    FOSCAM: http://{ip_address}:{port}/snapshot.cgi

Using your favorite web browser, acess your IP camera, turn authentication off and test the CGI command to get a snapshot of the camera. Then turn authentication on again.

2) In MATLAB:

a) firstly define the correct values for the variables: url, img_file, username, password. For instance:

    % URL to get a camera snapshot
    url='http://192.168.0.50/cgi/jpg/image.cgi'; 
    img_file='image_cam.jpg';  % temporary file used to store the camera image
    user='cam_user';       % username and password used to perform authentication
    pass='cam_password';

b) execute the following MATLAB commands:

    % grab the camera image and store it in a local temporary file
    urlwrite(url,img_file,'Authentication','Basic','Username',user,'Password',pass);
    % show the camera image and delete the local temporary file
    imshow(imread(img_file));
    delete(img_file);

I hope this info is useful.

Cairo L. Nascimento Jr. (<mailto:[e-mail] [e-mail]>)

ITA, Brazil