comp.lang.idl-pvwave archive: archive

Home » Public Forums » archive » Inverting the image

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: Inverting the image [message #28614 is a reply to message #28525]

Wed, 19 December 2001 16:12

James Kuyper Jr.
Messages: 10
Registered: November 2001

Junior Member

JD Smith wrote:

> 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.
...

> But seriously, you don't really say what you mean by "inverted", which
> is a concept which applies quantitatively only to colormaps, where it

There are many different possible meanings of "inverted"; the term
doesn't just apply to colormaps. To the geometrically inclined, the
meaning that seems most likely to apply in this case is the
transformation that replaces a function image(x,y,z) with
image(-x,-y,-z). Assuming that x=0,y=0,z=0 corresponds to the center of
his array, then in IDL terms that becomes:

invert = reverse(reverse(reverse(image, 1),2),3)

Report message to a moderator

[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

Previous Topic:	Re: global variables in IDL
Next Topic:	Re: image display by IDL

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Thu Oct 09 23:09:57 PDT 2025

Total time taken to generate the page: 1.19792 seconds