code: function unbiasnet() {
      for (var i = 0; i < netsize; i++) {
        network[i][0] >>= netbiasshift;
        network[i][1] >>= netbiasshift;
        network[i][2] >>= netbiasshift;
        network[i][3] = i; // record color number
      }
    }
docs: /*
  Private Method: unbiasnet
  
  unbiases network to give byte values 0..255 and record position i to prepare for sort