Sex Determination of Incomplete Skull of Han Ethnic in China

摘要

Sex determination is the first step in criminal investigation. Due to its easiness for protection, skull is considered to be the second important skeleton for sex determination. However, not all criminal cases can provide complete skull. In this paper, we present a sex determination model for incomplete skull. First, the skull is divided into seven partitions, the feature points are marked and the unmeasurable features are quantized. Then, the optimal feature subset of each partition is selected by using forward stepwise regression method based on maximum likelihood estimation. Seven partition sex determination decision models were set up and tested by using leave-one-out test. Finally, the final sex determination for incomplete female and male skull were constructed. Experiments show that any 3 partitions are enough to determine the sex of a skull with a high accuracy.