Forensic medical diatom detection automation method

A technology of forensic medicine and diatoms, applied in the field of forensic medicine inspection, can solve problems such as the difficulty in establishing an expert system for diatom identification and limit the development of an expert system for diatom identification, and achieve the effects of reducing diatom loss, low cost, and improving recovery rate

Inactive Publication Date: 2010-07-21
GUANGZHOU CRIMINAL SCI & TECH RES INST
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Problems solved by technology

However, due to the limitations of the existing diatom detection methods, it has been difficult to establish a clear and effective dat...

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  • Forensic medical diatom detection automation method
  • Forensic medical diatom detection automation method
  • Forensic medical diatom detection automation method

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Embodiment Construction

[0037] Attached below in conjunction with the instructions figure 1 with figure 2 The specific embodiment will be described.

[0038] The automated method for forensic diatom inspection of the present invention includes the following steps: establishment of a diatom scanning electron microscope image database, establishment of an automatic diatom identification system, and automatic detection of diatoms in water samples and cadaver organs.

[0039] The establishment process of the diatom scanning electron microscope image database includes the following steps:

[0040] A1. A wide range of water samples from different geographical locations (river, lake, ocean, etc.) are collected; A2, the water samples are tested for diatoms, which include microwave digestion, vacuum filtration, and scanning electron microscope image capture steps; A3. Analyze the SEM images of diatoms, and establish SEM image databases of different types of diatoms according to the morphological structure (contour...

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Abstract

The invention relates to a forensic medical diatom detection automation method, comprising the following steps: the building of a diatom scanning electron microscope image database, the building of a diatom automation recognition system and the diatom automation detection process in a water sample and a corpse visceral organ are sequentially carried out; wherein the diatom automation detection process in the water sample and the corpse visceral organ comprises the following steps: (1) microwave digestion and vacuum filtration are carried out to the water sample and the visceral organ; (2) divided field images of the sample are shot one by one by an automatic scanning electron microscope; (3) image reinforcement, image cutting and binaryzation treatment are carried out to the shot sample field scanning electron microscope images by adopting a Gabor filter, and gray threshold segmentation processing and mathematical morphology processing methods; morphological structure characteristics are extracted, and match retrieval and statistical calculation are carried out in a diatom morphological structure characteristic database. The method has the characteristics of simpleness, high efficiency, environment protection, accurate qualitative and quantitative analysis, thereby having good application prospect in the forensic medical drowning diagnosis practice.

Description

Technical field [0001] The invention relates to the field of forensic examinations, in particular to an automated method for forensic diatom examinations. Background technique [0002] Analysis of the cause of death of corpses in water has always been one of the difficulties in forensic practice. Although there are still differences in the diagnostic value of diatom testing, in forensic practice, diatom testing is still considered a relatively reliable diagnostic method for drowning, especially for the identification of the cause of death of corrupted corpses in water, which is considered the best Method of identification. In forensic diatom inspection, it is necessary to conduct qualitative and quantitative analysis of diatoms in water samples and corpse organs on site. For the quantitative analysis of diatoms, forensic scientists generally use optical microscopes to manually observe and count the diatoms in each field of view one by one. The work intensity is very high; while...

Claims

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Application Information

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IPC IPC(8): G01N23/225G01B15/00G01B15/04G01N1/44B01D29/00
Inventor 胡孙林温锦锋戴维列王松才张小婷
Owner GUANGZHOU CRIMINAL SCI & TECH RES INST
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