| map_image in IDL [message #5920] |
Wed, 13 March 1996 00:00  |
linda_peco
Messages: 1
Registered: March 1996
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Junior Member |
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I am trying to map an image to a map in IDL. I use map_set to establish
the type of map I am creating, then I use map_image to create the image I
will be using. The image is an integer array of the size (2048,1024). When
map_image is used, the result is an array about half the size.
Unfortunately, the image is no longer smooth. Is there any way to force
map_image to give me an output array equal in size to my input array?
Any assistance would be appreciated.
Linda M. Peco
linda_peco@jhuapl.edu
Johns Hopkins University Applied Physics Laboratory
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| Re: map_image in IDL [message #5992 is a reply to message #5920] |
Fri, 15 March 1996 00:00  |
Liam Gumley
Messages: 473
Registered: November 1994
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Senior Member |
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Linda M. Peco wrote:
> I am trying to map an image to a map in IDL. I use map_set to establish
> the type of map I am creating, then I use map_image to create the image I
> will be using. The image is an integer array of the size (2048,1024). When
> map_image is used, the result is an array about half the size.
> Unfortunately, the image is no longer smooth. Is there any way to force
> map_image to give me an output array equal in size to my input array?
Linda,
MAP_IMAGE is going to resize the image to fit the area defined by the
map edges - there is no way around it. If the you don't like the way the
image looks, then add the keywords (BILINEAR=1, COMPRESS=1): the image should
look somewhat better. The only way to increase the size of the image produced
by MAP_IMAGE is to use a bigger display window in the first place, before you
run MAP_SET (Note that these comments apply only to video display devices
with fixed pixel sizes. If you are using the Postscript device, then the
MAP_IMAGE keyword SCALE may be useful).
Cheers,
Liam.
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