| Re: warping lots of images [message #7052] |
Tue, 24 September 1996 00:00 |
davidf
Messages: 2866
Registered: September 1996
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Senior Member |
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Vanessa Chewings writes:
> We need to be able to easily join transects of aerial video images to a
> common base using control points eg. end to end or to a map base.
> Is there software already available based on IDL that can do that in a
> semi-automated way by clicking on corresponding points in images?
One way this kind of image warping is done is with the IDL
routines TRIANGULATE and TRIGRID. Control points are
located and the gridding routines are used to interpolate or warp
one image into the other. The method is called Early
Schizophrenic Capitalization. (Don't you just LOVE
science!)
The method is combined in one easy-to-use library routine called
WARP_TRI. Many people have implemented the routine by
putting two images side-by-side and having the user select
the control points from a visual inspection and selection with
the mouse. A good example of this (and one you can probably
easily modify for your own purposes) is the morphing
routine in the IDL demo. To see it, I think you can just
type "morph" at the IDL prompt.
Yours,
David
--
David Fanning, Ph.D.
Phone: 970-221-0438
Fax: 970-221-4728
E-Mail: davidf@fortnet.org
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| Re: warping lots of images [message #7059 is a reply to message #7052] |
Tue, 24 September 1996 00:00  |
Liam Gumley
Messages: 473
Registered: November 1994
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Senior Member |
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vanessa wrote:
> We need to be able to easily join transects of aerial video images to a
> common base using control points eg. end to end or to a map base.
> Is there software already available based on IDL that can do that in a
> semi-automated way by clicking on corresponding points in images?
ENVI will probably do what you want. You can download a demo version
from
ftp://ftp.rsinc.com/pub/envi_2.5
RSI will surely grant you a 30 day temporary license to try it out.
Otherwise the demo version runs for seven minutes.
Cheers,
Liam.
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