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Frank Warmerdam wrote:

> OK, with Bob, Chris and Joris negative on the idea, and no support I
> think I'm going to shelve this change.  I must say, I felt some
> trepidation about it, though it is the same behavior of a number of
> commercial tiff viewers (including any GDAL based application).

While I also think it shouldn't go into the library itself, if the
behaviour is so widespread, it might be an idea to add it as an option
to the tiff2rgba program, and maybe even, also as an option, to tiffcp
(so you can convert it to a standard colormapped TIFF).

I assume this only applies to min-is-black/-white greyscale images,
basically saying: treat the image as if the photometric is palette
instead of greyscale? I don't see how it would work with RGB.

					Gerben.


AWARE [SYSTEMS]		Imaging expertise for the Delphi developer
		TIFF and LibTiff Mailing List Archive
	LibTiff Mailing List TIFF and LibTiff Mailing List Archive January 2007 Previous Thread Next Thread Previous by Thread Next by Thread Previous by Date Next by Date Contact The TIFF Mailing List Homepage This list is run by Frank Warmerdam Archive maintained by AWare Systems	Thread 2007.01.18 19:47 "Re: tif_getimage - using colormap even if photometric interpwrong", by Chris Cox 2007.01.18 20:47 "Re: tif_getimage - using colormap even if photometricinterpwrong", by Joris Van Damme 2007.01.18 21:25 "Re: tif_getimage - using colormap even if photometricinterpwrong", by Frank Warmerdam 2007.01.22 10:13 "Re: tif_getimage - using colormap even ifphotometricinterpwrong", by Gerben Vos 2007.01.18 23:33 "Re: tif_getimage - using colormap even if photometricinterpwrong", by Bob Friesenhahn 2007.01.18 23:54 "Re: tif_getimage - using colormap even if photometricinterpwrong", by Joris Van Damme 2007.01.22 10:13 "Re: tif_getimage - using colormap even ifphotometricinterpwrong", by Gerben Vos Frank Warmerdam wrote: > OK, with Bob, Chris and Joris negative on the idea, and no support I > think I'm going to shelve this change. I must say, I felt some > trepidation about it, though it is the same behavior of a number of > commercial tiff viewers (including any GDAL based application). While I also think it shouldn't go into the library itself, if the behaviour is so widespread, it might be an idea to add it as an option to the tiff2rgba program, and maybe even, also as an option, to tiffcp (so you can convert it to a standard colormapped TIFF). I assume this only applies to min-is-black/-white greyscale images, basically saying: treat the image as if the photometric is palette instead of greyscale? I don't see how it would work with RGB. Gerben.

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2007.01.22 10:13 "Re: tif_getimage - using colormap even ifphotometricinterpwrong", by Gerben Vos