Use zzuf to corrupt an increasing percentage of a file's bits.
Usage: ./varifuzz inputfile outputdir/ ERRPCT_MIN ERRPCT_INCREMENT ERRPCT_MAX
where 0.0 <= ERRPCT_MIN < ERRPCT_MAX <= 100.0
and 0.0 < ERRPCT_INCREMENT < 100.0
E.g., to generate 51 versions of a file with 0% to 5% of the bits flipped,
./varifuzz examples/baboon640.jpg baboon 0.0 0.1 5.0