AWARE SYSTEMS
TIFF and LibTiff Mail List Archive

Thread

2005.05.25 09:52 "[Tiff] How to Write a tif file with compression = COMPRESSION_JPEG & photometric = PHOTOMETRIC_YCBCR ?", by Kelvin Zhong
2005.05.25 10:41 "Re: [Tiff] How to Write a tif file with compression = COMPRESSION_JPEG & photometric = PHOTOMETRIC_YCBCR ?", by Jean-Yves Le Ridant
2005.05.26 01:50 "Re: [Tiff] How to Write a tif file with c ompression = COMPRESSION_JPEG & photometr ic = PHOTOMETRIC_YCBCR ?", by Kelvin Zhong
2005.05.26 08:37 "Re[2]: [Tiff] How to Write a tif file with compression = COMPRESSION_JPEG & photometric = PHOTOMETRIC_YCBCR ?", by Jean-Yves Le Ridant
2005.05.26 10:02 "Re[2]: [Tiff] How to Write a tif file wit h compression = COMPRESSION_JPEG & photom etric = PHOTOMETRIC_YCBCR ?", by Kelvin Zhong
2005.05.26 12:24 "Re[3]: [Tiff] How to Write a tif file with compression = COMPRESSION_JPEG & photometric = PHOTOMETRIC_YCBCR ?", by Jean-Yves Le Ridant
2005.05.26 13:03 "Re: Re[3]: [Tiff] How to Write a tif file with compression =COMPRESSION_JPEG & photometric = PHOTOMETRIC_YCBCR ?", by Joris Van Damme
2005.05.26 14:10 "Re: [Tiff] How to Write a tif file with compression =COMPRESSION_JPEG & photometric = PHOTOMETRIC_YCBCR ?", by Jean-Yves Le Ridant
2005.05.26 16:23 "Re: [Tiff] How to Write a tif file with compression =COMPRESSION_JPEG& photometric = PHOTOMETRIC_YCBCR ?", by Joris Van Damme
2005.05.26 16:50 "Re: [Tiff] How to Write a tif file with compression =COMPRESSION_JPEG& photometric = PHOTOMETRIC_YCBCR ?", by Bob Friesenhahn
2005.05.26 17:00 "Re: [Tiff] How to Write a tif file with compression =COMPRESSION_JPEG&photometric = PHOTOMETRIC_YCBCR ?", by Joris Van Damme
2005.05.26 19:30 "Re: [Tiff] How to Write a tif file with compression =COMPRESSION_JPEG& photometric = PHOTOMETRIC_YCBCR ?", by Chris Cox
2005.05.26 19:34 "Re: [Tiff] How to Write a tif file with compression =COMPRESSION_JPEG& photometric = PHOTOMETRIC_YCBCR ?", by Bob Friesenhahn
2005.05.26 19:41 "Re: [Tiff] How to Write a tif file with compression =COMPRESSION_JPEG& photometric = PHOTOMETRIC_YCBCR ?", by Chris Cox
2005.05.26 19:38 "Re: [Tiff] How to Write a tif file with compression =COMPRESSION_JPEG& photometric = PHOTOMETRIC_YCBCR ?", by Chris Losinger
2005.05.26 19:43 "[Tiff] Re: Byte Order rules", by Chris Cox
2005.05.26 19:48 "Re: [Tiff] How to Write a tif file with compression =COMPRESSION_JPEG& photometric = PHOTOMETRIC_YCBCR ?", by Bob Friesenhahn
2005.05.28 18:01 "Re: [Tiff] How to Write a tif file with compression =COMPRESSION_JPEG& photometric = PHOTOMETRIC_YCBCR ?", by Joris Van Damme
2005.05.30 09:42 "Re: [Tiff] How to Write a tif file with compression =COMPRESSION_JPEG& photometric = PHOTOMETRIC_YCBCR ?", by Jean-Yves Le Ridant
2005.05.30 10:31 "Re: [Tiff] How to Write a tif file with compression=COMPRESSION_JPEG& photometric = PHOTOMETRIC_YCBCR ?", by Marti Maria
2005.05.30 13:04 "Re: [Tiff] How to Write a tif file with compression=COMPRESSION_JPEG& photometric = PHOTOMETRIC_YCBCR ?", by Jean-Yves Le Ridant
2005.05.30 14:39 "Re: [Tiff] How to Write a tif file with compression=COMPRESSION_JPEG& photometric = PHOTOMETRIC_YCBCR ?", by Marti Maria
2005.05.31 18:36 "Re: [Tiff] How to Write a tif file with compression=COMPRESSION_JPEG& photometric = PHOTOMETRIC_YCBCR ?", by Chris Cox
2005.05.31 18:35 "Re: [Tiff] How to Write a tif file with compression =COMPRESSION_JPEG& photometric = PHOTOMETRIC_YCBCR ?", by Chris Cox
2005.05.31 18:54 "Re: [Tiff] How to Write a tif file with compression =COMPRESSION_JPEG& photometric = PHOTOMETRIC_YCBCR ?", by Bob Friesenhahn
2005.05.31 19:00 "Re: [Tiff] How to Write a tif file with compression =COMPRESSION_JPEG& photometric = PHOTOMETRIC_YCBCR ?", by Chris Cox

2005.05.26 19:34 "Re: [Tiff] How to Write a tif file with compression =COMPRESSION_JPEG& photometric = PHOTOMETRIC_YCBCR ?", by Bob Friesenhahn

The really annoying "new rule" that seems to have popped up recently is that 24 bits-per-sample images are supposed to be swapped for endianness. To me that is still a resounding "huh"? I have yet to encounter a CPU with a 24-bit processor word.

It doesn't require a certain word size.

Windows prefers everything as BGR, while other OSes prefer RGB. Anything that is a multiple of 8 bits is subject to byte order rules (I have yet to see a 96 bit word CPU, either - but extended precision floating point is also subject to byte order).

What does Microsoft Windows have to do with the TIFF specification? Could it be that other OSs do not really "prefer" RGB but use the arbitrary ordering "RGB" because that is the convention that CIE standards use?

Bob
======================================
Bob Friesenhahn
bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/