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Re: Inverting the image [message #28522 is a reply to message #28474]

Wed, 19 December 2001 14:53

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

JD Smith (jdsmith@astro.cornell.edu) writes:

> Akhila wrote:
>>
>> HI,
>> I have an image of size(512 x 512 x 195). Its a CT image of chest and
>> the image appears with the backbone in the upward direction and the
>> sternum in the downward direction. I want to get it inverted.
>> For example:
>>
>> filename = Filepath(SubDirectory = ['examples', 'data'],
>> 'worldelv.dat)
>> image= BytArr(360, 360)
>> openR, lun, filename
>> ReadU, lun, image
>> Free_lun, lun
>>
>> Tvscl, image
>
> How about "1/image". Pretty inverted there.
>
> But seriously, you don't really say what you mean by "inverted", which
> is a concept which applies quantitatively only to colormaps, where it
> means "reverse the order of the colormap entries". Maybe you want
> something like:
>
> image=max(image)-image

I think more likely:

TVSCL, image, Order=1

Or,

TVSCL, Reverse(image, 2)

Cheers,

David
--
David W. Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438, E-mail: david@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
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[Message index]

		Inverting the image By: idlfreak on Wed, 12 December 2001 11:23
		Re: Inverting the image By: David Fanning on Wed, 19 December 2001 14:53
		Re: Inverting the image By: John-David T. Smith on Wed, 19 December 2001 15:20
		Re: Inverting the image By: John-David T. Smith on Wed, 19 December 2001 14:33
		Re: Inverting the image By: James Kuyper Jr. on Wed, 19 December 2001 16:12
		Re: Inverting the image By: idlfreak on Thu, 27 December 2001 23:17
		Re: Inverting the image By: David Fanning on Fri, 28 December 2001 10:03

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