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Re: write_tiff integer format [message #62517 is a reply to message #62423]

Thu, 11 September 2008 04:36

Spon
Messages: 178
Registered: September 2007

Senior Member

On Sep 11, 6:13 am, David Fanning <n...@dfanning.com> wrote:
> Geo logo writes:
>> I am a newcomer of IDL, when I try use write_tiff to write a integer
>> type tiff, the result always wrong.
>
>> input = intarr(1000,1000)
>> write_tiff, 'outimag.tif' , input
>
>> the result would be a byte type tiff file, and when I use
>
>> write_tiff, 'outimag.tif' , input,/short, result will be unsigned
>> int
>
>> write_tiff, 'outimag.tif' , input,/long, result will be long integer.
>
>> could somebody help me about how to output a integer type tiff file.
>
> The more relevant question might be, given that life totally
> sucks, how does one convert back and forth between signed
> and unsigned integers?
>
> 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.")

So what happens when you do this? :

input = uintarr(1000,1000)
write_tiff, 'outimag.tif' , input
input = fix(input)

Not got access to IDL right now, but I don't know why it shouldn't
work
Chris

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		Re: write_tiff integer format By: David Fanning on Wed, 10 September 2008 22:13
		Re: write_tiff integer format By: Spon on Thu, 11 September 2008 04:36

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