LibTiff Mailing List

Hi folks,

just another question: I've just discovered a feature of bmp2tiff:

If I feed this program with a 555bmp file, that is, 16 bits/pixel input, 
  I get a tiff as output that looks invalid to me. Specifically, it does 
not bitpack the file correctly. Instead of packing five bits of red, 
green and blue next to each other as it should, the code simply writes 
out the bmp contents/samples without removing the "0" pad-bit bmp 
inserts to complete a 16 bit word.

Is this a bug? Or is tiff containing 5-5-5 samples defined with a 
pad-bit? I don't see this anywhere in the specs.

Thanks,
	Thomas


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	LibTiff Mailing List TIFF and LibTiff Mailing List Archive May 2010 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 2010.05.11 19:46 "bmp2tiff questions", by Thomas Richter 2010.05.11 20:14 "Re: bmp2tiff questions", by Joris Van Damme 2010.05.12 16:56 "Re: bmp2tiff questions", by Bob Friesenhahn 2010.05.11 19:46 "bmp2tiff questions", by Thomas Richter Hi folks, just another question: I've just discovered a feature of bmp2tiff: If I feed this program with a 555bmp file, that is, 16 bits/pixel input, I get a tiff as output that looks invalid to me. Specifically, it does not bitpack the file correctly. Instead of packing five bits of red, green and blue next to each other as it should, the code simply writes out the bmp contents/samples without removing the "0" pad-bit bmp inserts to complete a 16 bit word. Is this a bug? Or is tiff containing 5-5-5 samples defined with a pad-bit? I don't see this anywhere in the specs. Thanks, Thomas

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2010.05.11 19:46 "bmp2tiff questions", by Thomas Richter