MATLAB: How to remove the black outlines when using ‘image’ command to display a image.

Question

Hi everyone,

I wanna display an image but also want to drag and drop this image. As far as I know, if I use command 'imshow' to display the image it is not draggable. I therefore have to use command 'Image' to display a single pixel image.

To simplify my question, I use the minimum code to this problem. See below.

Figure;

axes; % to draw an axes

I = ones(1,1,3); I(:,:,1) = 255; I(:,:,2) = 255;I(:,:,3) = 0; % to create a single pixel image file (yellow of course).

image(I) % display the single pixel yellow image in the axes.

Best Answer

I = ones(1,1,3);
I(:,:,1) = 255; I(:,:,2) = 255;I(:,:,3) = 0;
AxesH = axes('Visible', 'off', 'NextPlot', 'add');
image(I, 'Parent', AxesH);

Setting the Visiblility to 'off', hides the ticks and the box.

Related Solutions

MATLAB: Image invisible

Hide:

set(gca,'visible','off') %hide the current axes
set(get(gca,'children'),'visible','off') %hide the current axes contents

Show:

set(gca,'visible','on') %show the current axes
set(get(gca,'children'),'visible','on') %show the current axes contents

If needed replace gca by the handle of the axes you wish to work with

MATLAB: GUIDE automaticlly removes the tag from axes

When you call IMAGE, many axes properties are cleared. So after you call IMAGE, set the tag.

image(rgb);
axis off 
set(hObject,'tag','mytag')  % Set the tag to whatever you want

The other alternative would be to set the nextplot property to replacechildren. This will avoid resetting all the properties with calling IMAGE. See the doc on axes properties.

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Answer 1

I = ones(1,1,3);
I(:,:,1) = 255; I(:,:,2) = 255;I(:,:,3) = 0;
AxesH = axes('Visible', 'off', 'NextPlot', 'add');
image(I, 'Parent', AxesH);

Setting the Visiblility to 'off', hides the ticks and the box.