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Re: Stretching MODIS data [message #79142 is a reply to message #79141]

Tue, 31 January 2012 07:08

titan
Messages: 59
Registered: March 2006

Member

On 31 Gen, 14:40, David Fanning <n...@idlcoyote.com> wrote:
> titan writes:
>> I'm trying to obtain an RGB image using MODIS data channel 01,02,06
>> (daytime) and channels 20, 21 and 32 (night time).
>
>> My code is working fine except for the stretching result in the sense
>> that for the images obtained using "daytime channels" are darker than
>> the ones obtained with the "nighttime channels" and this happens only
>> for images belonging to winter season.
>
> I'm not sure this applies to your problem, but I've
> found that I needed to apply differential scaling
> to "brighten" MODIS images up:
>
> http://www.idlcoyote.com/ip_tips/brightmodis.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 thui. ("Perhaps thou speakest truth.")

Thank you David! I will try to check if this is my case too. I'll keep
you informed!!
in the meanwhile have you any idea why is this happening only for
images belonging to winter season??
cheers

titan

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[Message index]

		Re: Stretching MODIS data By: David Fanning on Thu, 02 February 2012 05:59
		Re: Stretching MODIS data By: titan on Thu, 02 February 2012 05:23
		Re: Stretching MODIS data By: David Fanning on Tue, 31 January 2012 07:16
		Re: Stretching MODIS data By: titan on Tue, 31 January 2012 07:08
		Re: Stretching MODIS data By: David Fanning on Tue, 31 January 2012 05:40
		Re: Stretching MODIS data By: titan on Mon, 06 February 2012 07:18

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