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Re: 16 bit Tiff image [message #58995 is a reply to message #58934]

Thu, 28 February 2008 23:34

Stefano Scardigli
Messages: 7
Registered: February 2008

Junior Member

what a mess =:-O

I'm on IDL 5.1 and I'm working on a remote server via ssh.

I haven't QUERY_TIFF
I haven't SWAP_ENDIAN_INPLACE

the images I'm dealing with are about 24 Mb each and they seem fine.
I'm thinking about some problem with multiband image (what is thinking
IDL) and the monocromatic mine.

I'm thinking to give up to this IDL.
I spent a lot of time in compiling GDL and all the other stuff it
requires. But I'm still not sure it is working fine.

Any idea?

Thanks to all

Stefano Scardigli

On Wed, 27 Feb 2008 16:12:24 -0700, David Fanning wrote:

> Stefano Scardigli writes:
>
>> better, thanks:
>>
>> IDL> img=read_tiff("V13A5.00.tif",/unsigned)
>> IDL> help,img
>> IMG LONG = Array[1000, 1000]
>> IDL> print,max(img)
>> 65535
>> IDL> write_tiff,"prova.tiff",fix(img),/SHORT <---------
>> IDL> help,img
>> IMG LONG = Array[1000, 1000]
>> IDL> print,max(img)
>> 65535
>> IDL> img2=read_tiff("prova.tiff",/unsigned)
>> IDL> help,img2
>> IMG2 LONG = Array[1000, 1000]
>> IDL> print,max(img2)
>> 255
>>
>> and now both img and img2 are LONG, but the reloaded img2 is still shrunk
>> to 255 levels (ie 8 bit)!
>
> I still don't think so. Are you being *very*
> careful with your variables? You might try using
> a .reset after you write the file and before you
> read it again. I think it is not possible to get
> what you are getting. :-)
>
> Cheers,
>
> David

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[Message index]

		Re: 16 bit Tiff image By: Andrew Cool on Thu, 28 February 2008 00:09
		Re: 16 bit Tiff image By: Stefano Scardigli on Wed, 27 February 2008 23:01
		Re: 16 bit Tiff image By: Stefano Scardigli on Wed, 27 February 2008 22:52
		Re: 16 bit Tiff image By: Jean H. on Wed, 27 February 2008 15:45
		Re: 16 bit Tiff image By: David Fanning on Wed, 27 February 2008 15:12
		Re: 16 bit Tiff image By: Stefano Scardigli on Wed, 27 February 2008 15:03
		Re: 16 bit Tiff image By: David Fanning on Wed, 27 February 2008 13:26
		Re: 16 bit Tiff image By: Jean H. on Wed, 27 February 2008 13:01
		Re: 16 bit Tiff image By: Stefano Scardigli on Wed, 27 February 2008 12:32
		Re: 16 bit Tiff image By: David Fanning on Wed, 27 February 2008 11:12
		Re: 16 bit Tiff image By: Stefano Scardigli on Thu, 28 February 2008 23:34

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