comp.lang.idl-pvwave archive: archive » Re: 16 bit Tiff image

Home » Public Forums » archive » Re: 16 bit Tiff image

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: 16 bit Tiff image [message #58944 is a reply to message #58942]

Wed, 27 February 2008 11:12

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Stefano Scardigli writes:

> I'm new in using IDL and I'm using an old version too.
> I have a strange problem in writing 16 bit TIFF files
>
> this is the dump of my problem (I omitted the unuseful rows):
>
> IDL Version 5.1 (OSF alpha). Research Systems, Inc.
> 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",img
> IDL> print,max(img)
> 255
> IDL> img2=read_tiff("prova.tiff",/unsigned)
> IDL> print,max(img2)
> 255
> IDL> help,img
> IMG BYTE = Array[1000, 1000]
> IDL> help,img2
> IMG2 BYTE = Array[1000, 1000]
> IDL>
>
> as you can see the file prova.tiff is a 8 bit image and also the array img
> is changed from LONG to BYTE. I tried all the parameter of the write_tiff
> procedure, but nothing change

I think you forgot the SHORT keyword here:

IDL> write_tiff,"prova.tiff",img

This should be:

IDL> write_tiff,"prova.tiff",img, /SHORT

Cheers,

David

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

Report message to a moderator

[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

Previous Topic:	Posting html form data with idlNetURL?
Next Topic:	AX and AZ keywords of iSurface and iVolume

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Wed Oct 08 17:28:38 PDT 2025

Total time taken to generate the page: 0.00424 seconds