Trace bloodstain nondestructive testing device and method

Abstract

The invention discloses a trace bloodstain nondestructive testing device and method. A light source module and a data acquisition module of the testing device are mounted on a support module, output of the data acquisition module is connected with a data processing module, output of the data processing module is connected with a data display module, the light source module provides a lighting white light source for the data acquisition module, and the data acquisition module is used for acquiring hyperspectral data of field images. During testing, a bloodstain testing model is established firstly, hyperspectral data of a field sampling point are acquired by a hyperspectral camera in real time and compared with the bloodstain testing model for analysis, and whether a bloodstain exists at the field sampling point or not is judged according to the category result and is displayed. With the adoption of the trace bloodstain nondestructive testing device and method, bloodstain testing at the full wave-band of a spectrum can be realized, and the device is portable and can be carried to the field for testing; meanwhile, the method is nondestructive, automatic scanning and testing are performed under the condition that the field is not destructed, and the feature point with the bloodstain is identified automatically.

Description

technical field

[0001] The invention relates to trace bloodstain detection, in particular to a nondestructive automatic detection device and method capable of realizing trace bloodstains at a crime scene, and belongs to the technical field of bloodstain detection. Background technique

[0002] Bloodstains are one of the most important physical evidence at a crime scene. The use of bloodstains as important evidence in criminal cases has the characteristics of being objective, stable, extensive, and complex, and has always been a very convincing evidence in court. Bloodstain has the dual characteristics of traces and physical evidence, which fully reflects its importance as physical evidence. Bloodstain detection plays an important role in crime scenes. The bloodstain detection at the crime scene can effectively extract the DNA information of the criminal suspect and restore the scene of the crime scene. This makes bloodstain detection play an incomparable role in evidence s...

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