No pop-up when using imshow

Hi sorry if this question has been asked before. I'm trying to view my images using the imshow command. I've tried a variety of input arguments (ex. adding additional parameters). I've also tried loading directly from a file, loading into a variable, and building my own image using the matrices in MatLab. Whenever I run imshow(image_name) nothing happens. No pop-up window, no error, nothing.

I'm using MatLab Version 9.7 and Image Processing Toolbox Version 11.0. I'm also on Windows.

Thanks in advance!

[Walter Roberson]

if you use image() or imagesc() instead of imshow() do you get output?

What shows up for

which -all image
which -all imshow

[William Rowe]

No output for image() or imagesc().

Here's the results from running those commands.

>> which -all image

built-in (C:\Program Files\MATLAB\R2019b\toolbox\matlab\specgraph\image)

>> which -all imshow

C:\Program Files\MATLAB\R2019b\toolbox\matlab\images\imshow.m

Also the plot command similarly does not work, so I think it's just some setting I have incorrect or maybe I don't have the correct windows open. Currently I am able to see the Command Window pane and the Workspace pane. Is there something else I should have open?

[Image Analyst]

Does this work?

clear all
close all
grayImage = imread('moon.tif');
imshow(grayImage);

[William Rowe]

Yes, that fixed it! @Image Analyst

Any idea what I was doing wrong? I don't think I shadowed the function, but not sure.

Answer 1

[Image Analyst]

William:

You probably had defined image or imshow and forgotten about it. Perhaps a variable, perhaps an m-file name, perhaps a function - who knows. Calling

clear all

fixed it by "undefining" the definition you made. Glad I could help.

(And to all those other people who always yell at me

that there is never any reason to call clear all,

here's proof that it's sometimes useful.)