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Re: TIFF Read/Write Bug? [message #84252 is a reply to message #84251]

Fri, 10 May 2013 14:08

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

David Fanning writes:

> If I add color vectors to the file, watch this:
>
> ;*********************************************
> outFilename = 'forest.tif'
> ageimage = read_tiff(file_which('boulder.tif'))
> ageImage = Fix(ageImage)
> Help, ageImage
> dims = SIZE(ageimage, /DIMENSIONS)
> missingIndices = long(randomu(seed, 1000) * product(dims))
> ageImage[missingIndices]=-999
> TVLCT, r, g, b, /GET
> Write_Tiff, outFilename, Reverse(ageImage,2), GEOTIFF=geo, $
> /SHORT, /SIGNED, RED=r, GREEN=g, BLUE=b
> testImage = Read_Tiff(outfilename)
> testimage = Reverse(testimage,2)
> Help, testImage
> END
> ;*********************************************
>
> AGEIMAGE INT = Array[1071, 1390]
> TESTIMAGE BYTE = Array[1071, 1390]
>
> Is that weird, or what!?

For me, at least, it doesn't matter what kind of data I put into the
TIFF file (I've tried SHORT, LONG, FLOAT, and DOUBLE), if I add color
vectors, then I can ONLY get BYTE data back from the file.

Again, Windows 64-bit and IDL 8.2.2.

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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[Message index]

		Re: TIFF Read/Write Bug? By: David Fanning on Sun, 12 May 2013 07:08
		Re: TIFF Read/Write Bug? By: tom.grydeland on Sun, 12 May 2013 04:03
		Re: TIFF Read/Write Bug? By: Heinz Stege on Fri, 10 May 2013 16:04
		Re: TIFF Read/Write Bug? By: Phillip Bitzer on Fri, 10 May 2013 14:29
		Re: TIFF Read/Write Bug? By: David Fanning on Fri, 10 May 2013 14:08
		Re: TIFF Read/Write Bug? By: David Fanning on Fri, 10 May 2013 13:48
		Re: TIFF Read/Write Bug? By: Phillip Bitzer on Thu, 09 May 2013 07:37
		Re: TIFF Read/Write Bug? By: Heinz Stege on Wed, 08 May 2013 15:19

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