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IDL 8.2, read pixel value along a surface [message #84520]

Tue, 21 May 2013 07:20

a.clovirola
Messages: 6
Registered: June 2013

Junior Member

Hello Everyone !

I use IDL 8.2 and my problem is the following :

I have a FITS Image that i know how to read. I choose 2 points and read the pixel value along the line between them.
My problem is, i want to do the same (i.e read the pixel value) but along a surface , (the same line but with some pixel wide)
I thought of using interpol, and add several one but it seems to be very long.

Any ideas ?

thanks !

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Re: IDL 8.2, read pixel value along a surface [message #85283 is a reply to message #84520]

Mon, 22 July 2013 09:52

topratingblogs
Messages: 2
Registered: July 2013

Junior Member

On Tuesday, May 21, 2013 9:20:25 AM UTC-5, Alexander C. wrote:
> Hello Everyone !
>
>
>
> I use IDL 8.2 and my problem is the following :
>
>
>
> I have a FITS Image that i know how to read. I choose 2 points and read the pixel value along the line between them.
>
> My problem is, i want to do the same (i.e read the pixel value) but along a surface , (the same line but with some pixel wide)
>
> I thought of using interpol, and add several one but it seems to be very long.
>
>
>
> Any ideas ?
>
>
>
> thanks !

Are there still people answering queries on this forum topic? I posted a question below hoping to get help. -- JP

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Re: IDL 8.2, read pixel value along a surface [message #85286 is a reply to message #85283]

Mon, 22 July 2013 10:38

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

topratingblogs@gmail.com writes:

> Are there still people answering queries on this forum topic? I posted a question below hoping to get help

People generally answer questions if they know the answer or only have
to spend a couple of minutes researching it. Questions that don't get
answers are either (1) so general as to be meaningless, (2) too
difficult to answer in a couple of paragraphs, (3) require 3-4 hours of
uncompensated research time, or (4) are easily answered by the person
asking the question if they spend five minutes with the on-line help. I
think your question probably falls in one or more of the latter
categories. :-(

Sample code and/or evidence that the person asking the question has at
least tried something generates more sympathy. For example, how have you
tried to read your image? What kind of image is it? What in the heck is
an "Impervious Surface Image"? Most of us, I think, have no idea what
exactly you want from us, but fear we will be stuck in a quagmire if we
get involved. :-)

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thue. ("Perhaps thou speakest truth.")

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Re: IDL 8.2, read pixel value along a surface [message #85287 is a reply to message #85286]

Mon, 22 July 2013 10:47

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

David Fanning writes:

> Sample code and/or evidence that the person asking the question has at
> least tried something generates more sympathy. For example, how have you
> tried to read your image? What kind of image is it? What in the heck is
> an "Impervious Surface Image"? Most of us, I think, have no idea what
> exactly you want from us, but fear we will be stuck in a quagmire if we
> get involved. :-)

Probably as good a time as any to post a link to how to ask technical
questions that elicit an answer:

http://www.catb.org/~esr/faqs/smart-questions.html

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thue. ("Perhaps thou speakest truth.")

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Re: IDL 8.2, read pixel value along a surface [message #86620 is a reply to message #84520]

Sat, 23 November 2013 08:08

jamaykaves
Messages: 1
Registered: November 2013

Junior Member

Hello,
I use IDL 6.4 andI have one little question. You write, you have a procedure for getting a pixel value between two points. Could You write it here, please? I think it should be same in IDL 6.4. Thank You a lot.

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