Why "imshow" function in GUI so slow?
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Yang
el 16 de Mzo. de 2012
Comentada: Image Analyst
el 20 de Sept. de 2022
I have a GUI program which shows 10 images using "axes(handles.axes1);" and "imshow(f);" function. But when I run it, the 10 images appear sequentially but not at the same time. There's a delay between each image showing. What's wrong within it?
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Walter Roberson
el 18 de Mzo. de 2012
If you must use imshow(), then skip the axes() call and use
imshow(f, 'Parent', handles.axes1);
However, if you do not need imshow() specifically (e.g., you do not need the tools that it adds), then use
imagesc(f, 'Parent', handles.axes1);
4 comentarios
Image Analyst
el 18 de Mzo. de 2012
You likely had a grayscale image and for some strange reason imagesc, unlike imshow, applies some weird colormap. To undo that you also need to call colormap(gray(256)) right after you call imagesc.
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Image Analyst
el 16 de Mzo. de 2012
Call "cla reset" before each call to imshow. Otherwise all the images "stack up" in the control and it will slow down each additional time imshow is called. cla reset clears out any prior images.
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DEBANJAN DEBNATH
el 20 de Sept. de 2022
I want it to look like a vedio with high frame per second. Can u help?
Image Analyst
el 20 de Sept. de 2022
@DEBANJAN DEBNATH - not enough information. You want what to "look like" a video? Please explain in your own, new discussion thread (not here).
Jan
el 16 de Mzo. de 2012
Nothing is wrong. Displaying an image needs some time.
You can use image and let drawnow trigger the screen update of the figure after all images have been inserted.
I assume posting the relevant part of the code and the size of the images might reveal other problems.
2 comentarios
Jan
el 18 de Mzo. de 2012
Please post a code which reproduces the problem. I do not see a problem for using IMAGE for a binary image. But perhaps I do not know exactly, what a binary image is...
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