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Re: creating elliptically shaped images [message #37096 is a reply to message #37091] Mon, 24 November 2003 08:36 Go to previous messageGo to previous message
Steven Lord is currently offline  Steven Lord
Messages: 1
Registered: November 2003
Junior Member
mark wrote:
> I'd like to form an image which has an elliptical shape and where all
> the pixels within this ellipse have values corresponding to any given
> function that I would specify, the simplest example being a uniform
> image (i.e. a value of 1 for all the pixels in the ellipse). Is there
> any nice way to do this in IDL or MATLAB other than looping through
> all the pixels and determining whether any given one lies within the
> ellipse?

It sounds like you want either a contour plot or an isosurface plot, or
something along those lines. See HELP CONTOUR and HELP ISOSURFACE, and look
at the examples in the Volume Visualization Techniques chapter of the Using
MATLAB Graphics manual.

--
Steve Lord
slord@mathworks.com

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