deltac dds

Deltac

These programs compress and uncompress 8 bit image files using delta modulation. The compressed file contains the difference of each byte from the previous one, coded in a single nibble. I tried the delta modulation programs, compress and pack on a 256 * 256 * 8 gray scale picture of me. The results were the following: 

Original			65536
/bin/pack			59660
/usr/ucb/compress		53510
deltac				40489

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Last modified: 2001-11-17