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February 2004
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2004.02.24 19:46 "Re: Support for 16-bits per sample images", by Bob Friesenhahn
On Tue, 24 Feb 2004, Chris Cox wrote: > > > What the other guys have told you on this list is that libtiff is > > capable of producing the original 16-bit data, but the interfaces > > require that you parse the data in your own application. Care must be > > taken since 16-bit TIFF can be big or little endian and the data is > > not re-ordered for you. > > If that is the case, that would be a major bug in LibTIFF -- because > differencing predictors have to be applied/removed in native byte > order. > LibTIFF should always convert the image data to native byte order > before handing it off. I suspect that you are right. I do know that ImageMagick/GraphicsMagick includes code to re-order these bytes to big-endian order, but that may be for ease of implementation since it always reads the data as an octet stream and never as 'unsigned short'. Bob ====================================== Bob Friesenhahn bfriesen@simple.dallas.tx.us http://www.simplesystems.org/users/bfriesen