2006.03.04 03:05 "[Tiff] LZW Compression with 16-bit TIFF", by Frank Peters
My problem concerns the compression of tiff files using the command:
tiffcp -c lzw:2 file.tif file_compressed.tif
With 8-bit tiff files this compression reduces the the file size by about 30%.
With 16-bit tiff files, however, the compressed file is actually LARGER. For example, using the above command a 36 megabyte 16-bit tiff file will "compress" to about 46 megabytes. For the other possible options, "-c lzw:1" and "-c lzw", the results are essentially the same. The compressed file is always significantly larger.
If I use "-c zip" as the option, 16-bit files are reduced somewhat (from 36 Mb to 34 Mb).
Is there possibly a bug in the 16-bit lzw code or does the fault lie elsewere?