how do i get a image which is present at the axes in gui?

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user06
user06 2015-3-1
回答： Image Analyst 2015-3-1
suppose i have two axes. and in one axes i have taken an image , now i want that after clicking on a button that image will transfer on to the 2nd axes in matlab gui..

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Geoff Hayes
Geoff Hayes 2015-3-1
Anamika - how did you load the image into the first axes? If you are using GUIDE, you can save the image to the handles structure (see guidata for details) within the callback (or whatever) that loads the image into the first image. Then, in the button callback, just access the image from handles and load it into the second axes.
See this example for a question that is similar to yours.

更多回答（1 个）

Image Analyst
Image Analyst 2015-3-1
Use getframe() and take the cdata field:
% Create sample data.
z = peaks(64);
surf(z);
colormap(jet(256));
% Get image from the axes container.
f = getframe(gca)
thisImage = f.cdata;
figure;
imshow(thisImage);
Of course it's best if you just use the original data, like Geoff suggested, if you can, but sometimes that's not convenient if you have to pass the array way down deep into a call stack. Using setappdata/getappdata is not much more onerous than the code I gave, but you must remember to call setappdata whenever you put new stuff into the axes, and I think you'd end up having to call getframe anyway if you wanted to capture any graphics you put into the overlay above the image.

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