Abstract
Objective To discuss whether there are differences in fingerprint ridge density between the males and the females and what the specific differences are. Method A total of 120 males and 120 females (all were college students in Fujian) were selected, and the fingerprint ridge densities of these 240 Han youths were counted. According to Acree method, the radial upper part of the core region of the fingerprint center was selected for analysis, because the fingerprint pattern types in this region all presented similar ridges. This method was used to isolate the ridge in a certain area, so as to facilitate the counting. A 5mm×5mm grid was designated as a counting area on the middle radial part of the fingerprint for identification. Fingerprint ridges in the unit area were counted, then the average was calculated, and finally SPSS software was used to process and analyze all the data obtained. Result For the females, the average ten-fingerprint ridge density was basically above 14 ridges/ 25mm2; and for the males, it was basically below 14.5 ridges/25mm2. Conclusion There are some differences in the density of ten-fingerprints between men and the females, and the females’ is generally higher than that of the males.
Highlights
In the traditional investigation, the fingerprint identification is mainly for individual identification and criminal suspects screening
The results showed that the ten-fingerprint density of females was greater than that of males
It has long been recognized that human fingers, palms ten-fingerprints and gender differences and soles have ridged skin, which are characterized by a complex pattern of “mountains and valleys”
Summary
The fingerprint identification is mainly for individual identification and criminal suspects screening. How to find more useful information from the obtained fingerprints and provide more valuable clues for criminal investigation cases becomes a very meaningful research topic. Relevant investigation data at home and abroad show that the incidence of the most basic types of fingerprint patterns is closely related to ethnicity, race, region, gender, and blood type. Based on this theory, this study attempts to use the density of fingerprint ridge to explore the gender difference, thereby deeply digging the evidence value of the fingerprint at the scene, so as to provide directions for the detection of criminal investigation cases. When fingerprints have no comparison value, if the gender of the persons left their fingerprints is concluded based on the
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