private long linearCount(int mVal, long numZeros) {
    return (Math.round(mVal * Math.log(mVal / ((double) numZeros))));
  }
Estimate bias from lookup table
@param count
         - cardinality before bias correction
@return cardinality after bias correction
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/common/ndv/hll/HyperLogLog.java