Display image in axes Matlab GUI.

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Hello!
I want to display an image in an axes Matlab GUI. Therefore, I selected an axes and a button to trigger the moment. In the button function I wrote:
myImage = imread('as.jpg');
axes(handles.axes7);
imshow(myImage);
The problem is that the image doesn't cover the all surface of the axes. Is it displayed little in the center of the axes. How can I display my image on entire surface of the axes?
Thank you!
  1 Comment
B.k Sumedha
B.k Sumedha on 5 Jun 2015
Check the size of the image

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Accepted Answer

Ingrid
Ingrid on 5 Jun 2015
this indeed means that the size of your image is much smaller than the size of your axes. To make it work on different computers (with different resolutions) and if you have set all units to normalized to obtain this you can use this code to circumvent the problem:
myImage = imread('as.jpg');
set(handles.axes7,'Units','pixels');
resizePos = get(handles.axes7,'Position');
myImage= imresize(myImage, [resizePos(3) resizePos(3)]);
axes(handles.axes7);
imshow(myImage);
set(handles.axes7,'Units','normalized');
  4 Comments
Jian Kang
Jian Kang on 7 Dec 2020
Thank you very much. It is very helpful.

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More Answers (4)

Image Analyst
Image Analyst on 5 Jun 2015
I know you already accepted an answer but I don't think you have to do all that - I never do and my images fill the axes. That would be a nightmare if you had to do that every time.
In my experience, the cause for this behavior is that you set "hold on" on that axes sometime in the past. Then when you go to display the new image, the axes size is sort of "locked" to the size of the image that was in there before you put hold on. To get around this, call "hold off" after you call axes() and before you call imshow(). If even that doesn't fix it, call "cla reset" between axes() and imshow(). That will certainly fix it and restore the axes back to its initial default state, which is to display the images with 'InitialMagnification' as 'fit'.
If even that doesn't fix it (never had this happen before), then you must not have your imshow() preferences set to fit. Look at iptprefs and at the 'ImshowInitialMagnification' setting. It should be set to 'fit'
  5 Comments
Walter Roberson
Walter Roberson on 2 Mar 2021
dinfo = dir('/MATLAB/toolbox/images/*/*.jpg');
filenames = fullfile({dinfo.folder}, {dinfo.name});
[~, barenames, ~] = cellfun(@fileparts, filenames, 'uniform', 0)
barenames = 1x38 cell array
{'baby'} {'car1'} {'car2'} {'car_1'} {'car_2'} {'car_3'} {'car_4'} {'colorCheckerTestImage'} {'eSFRTestImage'} {'flamingos'} {'foggyroad'} {'foggysf1'} {'foggysf2'} {'foosball'} {'football'} {'greens'} {'hallway'} {'hands1'} {'hands2'} {'indiancorn'} {'llama'} {'lowlight_1'} {'lowlight_2'} {'micromarket'} {'office_1'} {'office_2'} {'office_3'} {'office_4'} {'office_5'} {'office_6'} {'parkavenue'} {'peacock'} {'sevilla'} {'sherlock'} {'strawberries'} {'trailer'} {'wagon'} {'yellowlily'}
if ismember('cameraman', barenames)
disp('found camerman!');
else
disp('no cameraman');
end
no cameraman
if ismember('flamingos', barenames)
disp('found flamingos');
else
disp('no flamingos')
end
found flamingos
if ismember('lena', barenames)
disp('found lena')
else
disp('no lena')
end
no lena

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Walter Roberson
Walter Roberson on 5 Jun 2015
You can pass x and y coordinates to imshow() to indicate where you want the image to be placed in data coordinates. Please read the documentation as the positioning is a little unusual.
  3 Comments
Peter Manley-Cooke
Peter Manley-Cooke on 6 May 2017
Once again, the famous Walter has the answers. Where TMW fail to mention any of this connection which would have been useful. Anyhoo, this works a treat. Thanks Walter.

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thinh dang
thinh dang on 18 Jan 2018
i have a problem that the guide work fluently if i run in command window. but if i open the guide(.fic), it doesn't work! help me please! thank you!
  1 Comment
Image Analyst
Image Analyst on 18 Jan 2018
I made a quick launch shortcut that says "guide". Or you can also type guide onto the command line. Clicking on the .fig file in the current folder panel doesn't work. I know it brings up something but it's like a crippled version that doesn't really function, so don't try to launch either your program or the GUIDE interface by double clicking on the fig file. Use the green run triangle either in MATLAB or in GUIDE.

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robert arnold
robert arnold on 7 May 2020
how can i make the axis automatically adjust to anysize image?
  1 Comment
Image Analyst
Image Analyst on 7 May 2020
It does that already, doesn't it? No matter what size image you're trying to show, it will pick a good size for an axes (if you don't already have an active one), and then fit the desired image into it. Please show a screenshot where it was not adjusted automatically properly and say what you'd want it to look like.

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