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Re: rotating 3d array: help for the braindead! [message #3576]

Mon, 20 February 1995 10:12

mark_cadwell
Messages: 10
Registered: February 1994

Junior Member

> I have a stack of MRI images that make up a 3d array, and I want to turn
> all the constituent images over.
> At the moment, I've got a FOR loop that goes through using
>
> ROTATE(image(*,*,i),2)
>
> on each one, but I'm convinced there must be a better way to do it in a
> oner without the FOR loop to slow things down.

There is a method of animation called double buffering where you plot an
image to a virtual window, copy the virtual window to your main window,
and while that is going on, you're drawing the next image to the virtual
window again. The advantage of doing it this way is that plotting to
virtual windows is much faster (at least in my machine) that plotting to
visible windows, and copying from a virtual window to a visible window is
also much faster that plotting. The result is a nice, smooth, and
reasonably fast image rotation.

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[Message index]

		Re: rotating 3d array: help for the braindead! By: mark_cadwell on Mon, 20 February 1995 10:12
		Re: rotating 3d array: help for the braindead! By: Fergus Gallagher on Wed, 15 February 1995 04:03
		Re: rotating 3d array: help for the braindead! By: Fergus Gallagher on Wed, 15 February 1995 03:48
		Re: rotating 3d array: help for the braindead! By: pjclinch on Tue, 28 February 1995 03:19

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