How do I prevent axes clipping when changing zoom on a tall image?

How do I prevent axes clipping when changing zoom on a tall image?

When I have a tall skinny image, it renders at proper aspect ratio, but when I zoom, the image is restricted to the initial viewport size. How can I allow zoom to preserve aspect ratio without clipping the width of my tall image?

Answer 1

[MathWorks Support Team]

There are two possible solutions to this issue, one using Image Processing Toolbox and one with base MATLAB.

Image Processing Toolbox - Image Viewer app:

The Image Viewer app (which can be opened via the "imtool" function) that comes with the Image Processing Toolbox has the desired zooming behavior. It can be used as follows:

im = imread('TallSkinny.png');  % Plots your image
imtool(im);

When zooming, the width of the tall image will expand to fill the figure.

Run this command in MATLAB 2016a for documentation about "imtool" and the Image Viewer app:

>> web(fullfile(docroot, 'images/ref/imtool.html'))

Or,

for latest release documentation about "imtool" and the Image Viewer app please refer to:

https://www.mathworks.com/help/images/ref/imageviewer-app.html

Base MATLAB - No Axes Clipping:

In base MATLAB, you can change the Axes properties for "DataAspectRatioMode" and "Clipping" to achieve the desired behavior:

I = imread('TallSkinny.png');
imshow(I)
ax = gca;
ax.DataAspectRatioMode = 'manual';
ax.Clipping = 'off';

This should yield similar zooming behavior as does the "imtool" solution.

Run this command in MATLAB 2016a for documentation about Axes properties:

>> web(fullfile(docroot, 'matlab/ref/axes-properties.html'))

Or,

for latest release documentation about Axes properties refer to:

https://www.mathworks.com/help/matlab/ref/matlab.graphics.axis.axes-properties.html