CN2757125Y - Three dimension quantitative identifying system for crime detection trace - Google Patents
Three dimension quantitative identifying system for crime detection trace Download PDFInfo
- Publication number
- CN2757125Y CN2757125Y CN 200420117127 CN200420117127U CN2757125Y CN 2757125 Y CN2757125 Y CN 2757125Y CN 200420117127 CN200420117127 CN 200420117127 CN 200420117127 U CN200420117127 U CN 200420117127U CN 2757125 Y CN2757125 Y CN 2757125Y
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- dimensional
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- ccd video
- light source
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Abstract
The utility model relates to a three-dimensional quantitative identifying system for comparing and identifying a crime detection trace. The system is formed by that the inner part of a casing is provided with a light source which irradiates material examining matter, a CCD video camera which converts an optical signal which is generated under the condition that the light source irradiates the material examining matter into an electric signal and a computer and a display screen which are connected with the CCD video camera through a conducting wire. The CCD video camera which is arranged in the casing is formed by two CCD video cameras which can simultaneously shoot the material examining matter in horizontal direction and longitudinal and vertical direction. The utility model can simultaneously take the three-dimensional quantification data of the examined material at one time, and the displayed trace descriptive data are more comprehensive and complete than the data which are converted by a two-dimensional image in the prior art. The utility model can carry out the three-dimensional quantification and the identification for various examined materials of footprints, tools, warheads, etc., and by carrying out the comparison and the annexation for the trace which remains in a case, the accuracy rate and the work efficiency of checking in the working process of crime detection are enhanced.
Description
Technical field
The utility model relates to identification equipment, and is specifically a kind of in judicial expertise, by sample and sample are compared, so that vestige is made the three-dimensional recognition system that quantizes of criminal investigation vestige that comparison is identified.
Background technology:
In the prior art, to the imaging of criminal investigation vestige and be converted into numerical information input computing machine, in the equipment that compares with the original information of calculator memory storage, mainly be to obtain the planar image that vestige amplifies again with ccd video camera.The shortcoming of this kind equipment is a steric information of having ignored vestige, can not reflect the real topography of vestige, therefore can provide the quantity of information of identification reference less relatively.Thereby the accuracy rate of the conclusion that is drawn when carrying out the trace inspection can descend to some extent.
The utility model content
The purpose of this utility model just is to provide a kind of criminal investigation vestige the three-dimensional recognition system that quantizes, and so that vestige is made three-dimensional imaging, is translated into the 3-D quantitative data simultaneously and analyzes identification.
The utility model is achieved in that light source that irradiation sample material is installed in housing, produce the sample material under the irradiation of light source optical signalling is transformed into the CCD gamma camera of electric signal, by computing machine and display screen that lead links to each other with the CCD gamma camera, the CCD gamma camera by dress in housing is and to indulge two CCD gamma cameras that the direction of hanging down be taken the sample material simultaneously from horizontal direction.
The utility model adopts two video cameras simultaneously the level and the vertical direction of hanging down of sample material to be taken imaging, and its conversion is synthesized the 3-D quantitative data.Because vestige often is depression, stereo structure, its shape and fine feature all are distributed in three dimensions, this criminal investigation vestige is three-dimensional to quantize the 3-D quantitative data that recognition system can once be obtained sample simultaneously, and the data that given vestige data of description is transformed than two dimensional image in the prior art compare more comprehensively, more complete.From view angle of statistics, available separate sampled data is many more, and is high more to the degree of confidence of the overall permanence statistical inference of stochastic process.Therefore, just more reliable to the statistical study of criminal investigation vestige.The utility model can carry out three-dimensional to the various samples that comprise footprint, instrument, bullet etc. and quantize identification, by the criminal investigation vestige that all kinds of cases are left over compare with string also, improve check accuracy rate and work efficiency in the criminal investigation work.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is a structured flowchart of the present utility model.
Embodiment
As shown in Figure 1 and Figure 2, the three-dimensional recognition system that quantizes of this criminal investigation vestige is to be equipped with heat radiation air port 6 on housing 4, and the light source 8 and the incident light wave filter of irradiation sample material is installed in the housing 4.Because different sample materials have different characteristics, need to use different types of light source to shine, use multiband main light source, side to penetrate light, transmitted light, axis light, ultraviolet light etc. as selecting.The incident light wave filter carries out optical lightscreening to the required incident light source 8 of above-mentioned sample material to be handled.Receive optical signalling that optical filter produces under the irradiation of light source the sample material and carry out optical lightscreening and handle, the CCD gamma camera will be transformed into electric signal by the optical signalling that receives after optical filter is handled, and send computing machine display analysis system to store or compare.Display screen can the captured 3 D stereo information of instant playback, also can be with the data message that obtains from the CCD gamma camera and comparison result shows in display screen.Wherein CCD gamma camera 2 is fixed with horizontal direction, can absorb the image of the vertical direction of hanging down of sample, and CCD gamma camera 3 is fixed with vertical direction, can absorb the image of the horizontal direction of sample.Computing machine 5 is by the action of lead control light source 8, incident light wave filter, reception optical filter and CCD gamma camera.
When sample was bullet, in order to obtain the three-dimensional information of bullet exactly, the utility model also can be equipped with exsertile carriage 1 in the bottom of housing 4, and carriage is provided with rotatable stage 7.Rotatable stage 7 adopts the servo-drive system commander.Telescopic bracket 1 and rotatable stage 7 all can utilize existing known technology and structure to install and be provided with.When bullet is detected, tested bullet is positioned on the rotatable stage, after the starting point of determining to sample, start the objective table rotation, until having gathered tested one circle of bullet profile.Can obtain the raw data of the three-dimensional vestige pattern of tested bullet surface.Because therefore the three-dimensional change shape that detects the land edge of truly having noted down bullet trace analyses and compares the gained result also more accurately and reliably.Simultaneously, in bullet trace detects, the raw data of three-dimensional vestige pattern can provide many new, to the helpful characteristic parameter of examination of bullet mark.As the degree of wear, the characteristic parameter that little strain line peak valley quantity, extreme point, the gradient etc. can not or can not accurately obtain from the analysis of plane picture.Use the utility model, the fine feature that can overcome in the prior art because of failing fully to write down bullet causes comparing the weakness that difference can not fully show between the bullet, with help the vestige expert more accurate, scientifically compare the nuance of bullet trace, to determine case-involving gun more exactly.
Claims (2)
1, the three-dimensional recognition system that quantizes of a kind of criminal investigation vestige, the light source of irradiation sample material is installed in housing (4), the optical signalling that produces under the irradiation of sample material at light source is transformed into the CCD gamma camera of electric signal, computing machine (5) that links to each other with the CCD gamma camera by lead and the display screen that is installed on surface of shell, it is characterized in that in housing (4), being equipped with and from horizontal direction and to indulge two CCD gamma cameras (2,3) that the direction of hanging down is taken the sample material simultaneously.
2, the three-dimensional recognition system that quantizes of criminal investigation vestige as claimed in claim 1 is characterized in that in the bottom of housing (4) exsertile carriage (1) being installed, and carriage is provided with rotatable stage (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420117127 CN2757125Y (en) | 2004-12-08 | 2004-12-08 | Three dimension quantitative identifying system for crime detection trace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420117127 CN2757125Y (en) | 2004-12-08 | 2004-12-08 | Three dimension quantitative identifying system for crime detection trace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2757125Y true CN2757125Y (en) | 2006-02-08 |
Family
ID=35965512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420117127 Expired - Fee Related CN2757125Y (en) | 2004-12-08 | 2004-12-08 | Three dimension quantitative identifying system for crime detection trace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2757125Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101889865A (en) * | 2010-06-17 | 2010-11-24 | 山东警察学院 | Method for extracting handprints on irregular object |
| CN103549960A (en) * | 2013-10-16 | 2014-02-05 | 杭州创恒电子技术开发有限公司 | Footprint acquisition and extraction device and footprint acquisition and extraction method |
| CN107085349A (en) * | 2017-06-13 | 2017-08-22 | 深圳市华周测控技术有限公司 | Reflective 3D imaging devices |
-
2004
- 2004-12-08 CN CN 200420117127 patent/CN2757125Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101889865A (en) * | 2010-06-17 | 2010-11-24 | 山东警察学院 | Method for extracting handprints on irregular object |
| CN103549960A (en) * | 2013-10-16 | 2014-02-05 | 杭州创恒电子技术开发有限公司 | Footprint acquisition and extraction device and footprint acquisition and extraction method |
| CN103549960B (en) * | 2013-10-16 | 2015-04-01 | 杭州创恒电子技术开发有限公司 | Footprint acquisition and extraction device and footprint acquisition and extraction method |
| CN107085349A (en) * | 2017-06-13 | 2017-08-22 | 深圳市华周测控技术有限公司 | Reflective 3D imaging devices |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |