| Re: Overlaying where data [message #58362 is a reply to message #58288] |
Fri, 25 January 2008 11:53   |
jtmcahill
Messages: 26
Registered: October 2007
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Junior Member |
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On Jan 25, 8:52 am, David Fanning <n...@dfanning.com> wrote:
> jtmcah...@gmail.com writes:
>> Great! Thanks! I had to download your library to get some of the
>> functions of tvlct to work but it works great. Now, I might be
>> pushing my luck here, but each data area has a range of values as
>> well. Basically, I modeled a multispectral image array and the areas
>> I'm highlighting have results of my modeling. If I want to, can I
>> overlay a false colored tvscl image in a similar manner?
>
> I don't understand the question, but I'm sure the answer
> is "yes", you can do whatever you like with IDL. :-)
>
> I don't know what "overlay a false colored tvscl image
> in a similar manner" means in the context of the discussion
> so far. Can you elaborate?
>
> Cheers,
>
> David
> --
> David Fanning, Ph.D.
> Fanning Software Consulting, Inc.
> Coyote's Guide to IDL Programming:http://www.dfanning.com/
> Sepore ma de ni thui. ("Perhaps thou speakest truth.")
Ok, let's see if I can explain this more clearly. First, I display
the original image in tvscl. Then, I've got a second array that I've
determined the % of a given mineral per pixel (say from 0 to 1 or 0 to
100 either way you want to look at it). I can tvscl the % mineralogy
no problem in a window on its own (colored or grey scale). But what
I'd like to do is to overlay the original image that is tvscl, with
another tvscl (which is the % mineralogy) without effecting the
original image. So, it is similar to highlighting the area of the
image that fit my criteria (like above), but now I'd like it to
visually show the areas with a higher and lower % of that mineral as
well. The first image would be grey scale, the second overlayed image
probably in color. You may think that the entire image would be
colored, but no. Because I've already picked out pixels that fit
another geochemical criteria first. So, I only have ~20% of the
original image to cover. If I display the second image alone, the
observer has no context for what they are looking at. But, if I over
lay it on the first image, that will provide the context. That's what
I'm shooting for.
Mahalo,
Josh
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