Study on the Stability of Finger Crease Features During Epidermal Replacement Time
Fingerprint is the main morphological area on the finger,which plays an important role in daily life.Fingerprint crease is an obvious feature of non-cutaneous ridge configuration and flexor fold in dermatology.It is also called fingerprint white lines by many scholars because the white stripes can interrupt the normal friction ridge in different directions in the fingerprinting.Due to the characteristics of fingerprint crease features had obvious morphological structure and widely exist in the population,while its formation and performance are affected by a variety of factors,finger crease features have gradually entered the vision of researchers at home and abroad in the field of forensic science.To explore the stability and variation of fingerprint crease features is the basic premise of applying finger crease features to fingerprint identification,but there are few basic theoretical studies on finger crease features at present.In this paper,the influence of skin metabolism on the finger crease features was studied,aiming to explore whether the finger crease features have short-term tissue stability during the time of epidermal replacement,and to analyze the identification value and risk of finger crease features.A high magnification digital microscope was used to observe and mark the features of 462 finger crease features in 20 samples for a month.The length and relative position were measured and the coefficient of variation was calculated to analyze the stability of finger crease features.The results showed that about 82%of creases had strong stability,12%had small changes,and 5%had obvious changes during skin replacement time.The finger crease features were extremely unstable during the desquamation of skin.Most finger crease features form linear trajectories and their relative positions were stable.Therefore,the characteristics of finger crease are both variable and relatively stable.Its application in fingerprint identification has some limitations,but its important value in fingerprint identification cannot be ignored.If the characteristics of finger crease features are good,we can make full use of identification value under the premise of avoiding identification risks,so that the identification of difficult fingerprints can be based on more types of features,thus making the identification opinions more scientific and reliable.At the same time,it should be noted that the blind application of crease features may increase the risk of fingerprinting.The research results of this paper are an effective supplement to the basic theory of finger crease features,and it is helpful to enrich fingerprint examiners'understanding of finger crease features and the identification value and risk of finger crease features.
万方数据
维普
