Zoom an area of an image while showing whole image

May any body help me how can I zoom just an area (a circle) of an image?

For example I want show an image with a zoomed area

[Adam]

What is wrong with using the zoom option from the figure or axes toolbar?

Answer 1

[Image Analyst]

Try my attached demo where I use a scroll panel and min-image where it shows both the zoomed image and a small mini-image where the whole image is visible.

Answer 2

[saptarshi jana]

There is an easy and simple solution for it without writing any code. from figure toolbar, 1. View>property editior 2. edit>copy figure, 3. paste it over the originial figure, 4. rescale the size and relocate the pasted figure as per your need, 5. zoom to the part which you want, 6. Insert> arrows, rectangles, etc in the main figure to indicate which part you are magnifying.

[saptarshi jana]

[Devyani Varshney]

How do you paste it over the original figure in MATLAB ? could you elaborate on the steps?

[Devyani Varshney]

okay got it, instead of edit>copy figure (it was not allowing it to paste it again on original figure). I used Ctr+c and Ctr+v

Answer 3

[Jan]

Take the time to look in the FileExchange: FEX: Search "zoom" :

• https://www.mathworks.com/matlabcentral/fileexchange/59857-zoomplot
• https://www.mathworks.com/matlabcentral/fileexchange/2884-zoombox
• https://www.mathworks.com/matlabcentral/fileexchange/55969-zoomorientation-axh-state
• https://www.mathworks.com/matlabcentral/fileexchange/61347-zoom-in-on-figure
• https://www.mathworks.com/matlabcentral/fileexchange/30556-popout
• https://www.mathworks.com/matlabcentral/fileexchange/29276-dragzoom-drag-and-zoom-tool
• https://www.mathworks.com/matlabcentral/fileexchange/26007-on-figure-magnifier
• https://www.mathworks.com/matlabcentral/fileexchange/5961-magnify
• https://www.mathworks.com/matlabcentral/fileexchange/49055-maginset
• ...

All of them use an rectangular section for zooming. I assume, you can adjust one of them to display a circular area also.

[Ali Purse]

Thank you for your answer but I want to show whole Image which just a part of it is being zoomed.

[Adam]

Do you mean in two different axes? Otherwise how do you expect to show the whole image at the same time as a zoomed section?

[Image Analyst]

My demo has two different axes. All I can figure is that there must be a single axes on a figure that starts off small and then enlarges as the image is zoomed/magnified. However at some point the axes will take up nearly the whole screen/figure and to zoom further you'd have to give up the requirement that the whole image be visible.