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Re: IDL 8 image function [message #74829 is a reply to message #74762]

Thu, 03 February 2011 00:28

sh
Messages: 26
Registered: April 2010

Junior Member

On Feb 2, 8:20 pm, Paulo Penteado <pp.pente...@gmail.com> wrote:
> On Feb 2, 3:35 pm, sh <sebastian.h...@gmail.com> wrote:
>
>> Ok this error message comes if RGB_TABLE is not specified within the
>> image()
>
>> Now the only problem left is to rescale the colorbar from 0 to 255 to
>> the dataspace
>
> I had a feeling I had done this before. As it turns out, I did:
>
> http://www.ppenteado.net/idl/pp_lib/doc/pp_colorbar_range.ht ml
>
> It was written back in the days of the iTools, but it seems to work
> the same with Graphics.

Thanks!! I have already a workaround for this ;)

I create a hidden image with the MY max and min values, and then use
the colorbar function on this hidden image "overlay".

ov_im=image([[minv,minv],[maxv,maxv]],/HIDE,/OVERPLOT)
c = COLORBAR(TARGET=ov_im)

It works fine with an RBGA image in the beginning, which I have scaled
myself with BYTSCL.
Unfortunately the colorbar uses always 256 colors/values, so when I
want to use only index from 0 to 100, the rest is black.
I'm playing around now with the 'IDLgrPalette', maybe I can convince
IDL to use only the number of colors specified there.

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[Message index]

		Re: IDL 8 image function By: penteado on Wed, 02 February 2011 11:20
		Re: IDL 8 image function By: sh on Wed, 02 February 2011 09:35
		Re: IDL 8 image function By: David Fanning on Wed, 02 February 2011 09:00
		Re: IDL 8 image function By: sh on Wed, 02 February 2011 08:51
		Re: IDL 8 image function By: Paul Van Delst[1] on Wed, 02 February 2011 08:35
		Re: IDL 8 image function By: David Fanning on Wed, 02 February 2011 08:21
		Re: IDL 8 image function By: sh on Wed, 02 February 2011 08:11
		Re: IDL 8 image function By: penteado on Wed, 02 February 2011 07:51
		Re: IDL 8 image function By: David Fanning on Wed, 02 February 2011 07:43
		Re: IDL 8 image function By: sh on Wed, 02 February 2011 07:30
		Re: IDL 8 image function By: sh on Wed, 02 February 2011 05:31
		Re: IDL 8 image function By: sh on Wed, 02 February 2011 03:44
		Re: IDL 8 image function By: David Forcadell on Wed, 02 February 2011 02:44
		Re: IDL 8 image function By: sh on Thu, 03 February 2011 00:28
		Re: IDL 8 image function By: sh on Thu, 03 February 2011 00:28
		Re: IDL 8 image function By: sh on Thu, 03 February 2011 00:28

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