CN103838059A - Site footprint photographing mode - Google Patents
Site footprint photographing mode Download PDFInfo
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- CN103838059A CN103838059A CN201410117440.5A CN201410117440A CN103838059A CN 103838059 A CN103838059 A CN 103838059A CN 201410117440 A CN201410117440 A CN 201410117440A CN 103838059 A CN103838059 A CN 103838059A
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- footprint
- glancing
- glancing light
- light
- spot
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- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 238000005286 illumination Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
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Abstract
The invention provides a site footprint photographing mode. In a glancing light lighting environment where the incident angle between glancing light and a footprint mark bearing object is small enough, fixed-angle photographing is carried out, images of footprints and the footprint mark bearing object are formed, in a diffuse reflection light lighting environment, images of a footprint mark bearing object without footprints are photographed in a fixed-angle mode, and two images which can carry out layer reducing comparing to obtain footprint images are formed. According to the site footprint photographing mode, glancing light lighting is used, images with footprints can be formed by photographing, in the diffuse reflection light lighting environment, the images of the footprint mark bearing object without footprints are photographed in a fixed-angle mode, and the two images which can carry out layer reducing comparing to obtain the footprint images are formed by two-time photographing. By selecting the incident angle between glancing light and the footprint mark bearing object, image collecting effect can be better, and accordingly better image materials are provided for following footprint obtaining affirmation.
Description
Technical field
The present invention relates to a kind of shooting style, especially a kind of shooting style of on-the-spot footprint, belongs to footprint shooting style field.
Background technology
In footprint image leaching process, subtract layer method as adopted and extract footprint, just need to carry out twice collection to footprint image, the image once gathering is the image that has footprint and hold trace object, the image once gathering is not have the footprint of footprint to hold the image of trace object, in order better to carry out image acquisition, need to provide a kind of shooting style that adapts to this demand.
In view of this special proposition the present invention.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art, and a kind of shooting style of on-the-spot footprint is provided, and can meet preferably the requirement of twice image acquisition.
For solving the problems of the technologies described above, the present invention adopts the basic conception of technical scheme to be:
A kind of shooting style of on-the-spot footprint, hold definite angle shot in the glancing light lighting environment that incident angle between trace object is enough little and be formed with footprint and footprint and hold the image of trace object at glancing light and footprint, hold the image of trace object at the trackless footprint of definite angle shot in lighting environment of diffusing, twice shooting forms the two width images that can subtract layer contrast and then obtain footprint image.
Further, in glancing light lighting environment, the incident angle that glancing light and footprint hold between trace object is 0-10 degree.
Further, the glancing light source that forms glancing light is positioned at footprint Width both sides, and the length direction in glancing light source is consistent with the length direction of footprint.
Further, glancing light is plunderred and is penetrated in target area and the glancing light of footprint both sides can mutually compensate the whole of footprint can be thrown light on accordingly.
Further, list structure is taked in the glancing light source that forms glancing light.
Further, collimating mirror or calibration lens system are taked in the glancing light source that forms glancing light.
Further, diffuse in lighting environment, take area source to form and diffuse.
Further, be positioned at footprint Width both sides as sending the area source diffusing, the length direction of area source is consistent with the length direction of footprint.
Further, form glancing light and the light source that diffuses and all adopt white light source.
Adopt after technique scheme, the present invention compared with prior art has following beneficial effect.
The shooting style of a kind of on-the-spot footprint of the present invention, utilize the illumination of glancing light, can take the image that is formed with footprint, hold the image of trace object at the trackless footprint of definite angle shot in lighting environment of diffusing, formation can subtract layer contrast and then obtain two width images of footprint image.And due to the selection that glancing light and footprint hold the incident angle between trace object, can make image acquisition better effects if, thus for after footprint obtain and assert better iconography is provided.
Embodiment
Carry out on-the-spot footprint the taked equipment of taking pictures, comprise cabinet, camera, four groups of LED light sources, two groups of white light LEDs side light lamps form glancing light sources, two groups of diffuse reflection light sources.High-pixel camera head is fixed on enclosure top, and definite angle shot forms standardization footprint and takes pictures, and is convenient to later stage retrieval qualification.Each footprint that gathers is taken respectively glancing light and the two picture group sheets that diffuse under two kinds of photoenvironments, forms the image under Different Light, is convenient to remove background and carries out footprint identification.
List structure is taked in the glancing light source that forms glancing light, and takes collimating mirror or calibration lens system.Collimating mirror can be cylindrical mirror, convex lens or concave mirror, and calibration lens system can be the unitized construction of cylindrical mirror, convex lens or concave mirror.In the present embodiment, select cylindrical mirror.
In order to make imaging effect better, the incident angle that glancing light and footprint hold between trace object is 0-10 degree.
Glancing light source is oppositely arranged in cabinet both sides, and cabinet bottom is open.While taking pictures, on the footprint that chassis cover is taken at needs, the glancing light source that forms glancing light is positioned to the Width both sides of footprint, the length direction of light source is consistent with the length direction of footprint.Glancing light will ensure to plunder to be penetrated in target area and the glancing light of footprint both sides can mutually compensate the whole of footprint can be thrown light on accordingly.Target area refers to the region of holding trace object of being enclosed the footprint of drawing together and being born footprint by cabinet.
Because the width of footprint is less than length, light is decayed gradually with the increase of propagation distance, therefore, the glancing light source that forms glancing light is positioned at the both sides of the Width of footprint, the length direction of light source is consistent with the length direction of footprint, be that footprint Width both sides are located in glancing light source, from footprint one side along footprint Width directive opposite side.Like this, can make the glancing light of both sides mutually compensate, be unlikely to make to be positioned at the middle footprint in two glancing light sources the not enough phenomenon of illumination occurs.If two glancing lights are located at toe and the heel position of footprint, footprint length direction both sides are located in glancing light source, because the length of footprint is larger, glancing light decay may occur excessive, cause footprint illumination not enough.In other embodiments, glancing light source also can be set in footprint Width both sides and ensure to take needs, and glancing light source is set in footprint length direction both sides adds intense light irradiation and further improve shooting effect.
Light source adopts white light, is that imaging effect is better because the light wave of white light is shorter.
Diffuse and take area source to provide, the light that LED sends scatters out after being mapped to the expelling plate with hair side, and to footprint and hold trace object and throw light on, diffuse reflection light source is oppositely arranged in cabinet both sides, and diffuse reflection light source is above glancing light light source.In the present embodiment, diffuse reflection light source is positioned at footprint Width both sides.
Multiple high-pixel camera heads are positioned at cabinet top, and straight down to footprint and hold trace object and take, in the present embodiment, camera is two, and two cameras are arranged along footprint length direction.
A kind of shooting style of on-the-spot footprint, hold at glancing light and footprint the image that definite angle shot in the glancing light lighting environment that incident angle between trace object is enough little is formed with footprint and holds trace object, the glancing light source that forms glancing light is positioned at footprint Width both sides, and the length direction of light source is consistent with the length direction of footprint.The incident angle that glancing light and footprint hold between trace object is 0-10 degree, and incident angle can obtain good shooting effect within the scope of this.
Glancing light is plunderred and is penetrated in target area and the glancing light of footprint both sides can mutually compensate the whole of footprint can be thrown light on accordingly.
Diffuse in lighting environment, take area source to form and diffuse.Area source is positioned at the both sides of footprint Width, and the length direction of light source is consistent with the length direction of footprint.The image that holds trace object at the trackless footprint of definite angle shot in lighting environment of diffusing is Background, by forming the two width images that can subtract layer contrast and then obtain footprint image at glancing light and twice shooting diffusing under two kinds of photoenvironments.Utilize the image of twice shooting, remove background and obtain footprint image.
The light source that forms glancing light and diffuse all adopts white light source.
Adopt after technique scheme, the present invention compared with prior art has following beneficial effect.
The shooting style of a kind of on-the-spot footprint of the present invention, utilize the illumination of glancing light, can definite angle shot be formed with footprint and hold the image of trace object, hold the image of trace object at the trackless footprint of definite angle shot in lighting environment of diffusing, formation can subtract layer contrast and then obtain two width images of footprint image.And due to the selection that glancing light and footprint hold the incident angle between trace object, can make image acquisition better effects if, thus for after footprint obtain and assert better iconography is provided.
Embodiment in above-described embodiment can further combine or replace; and embodiment is described the preferred embodiments of the present invention; not the spirit and scope of the present invention are limited; do not departing under the prerequisite of design philosophy of the present invention; the various changes and modifications that in this area, professional and technical personnel makes technical scheme of the present invention, all belong to protection scope of the present invention.
Claims (9)
1. the shooting style of an on-the-spot footprint, it is characterized in that: hold definite angle shot in the glancing light lighting environment that incident angle between trace object is enough little and be formed with footprint and footprint and hold the image of trace object at glancing light and footprint, hold the image of trace object at the trackless footprint of definite angle shot in lighting environment of diffusing, twice shooting forms the two width images that can subtract layer contrast and then obtain footprint image.
2. the shooting style of a kind of on-the-spot footprint according to claim 1, is characterized in that: in glancing light lighting environment, the incident angle that glancing light and footprint hold between trace object is 0-10 degree.
3. the shooting style of a kind of on-the-spot footprint according to claim 1 and 2, is characterized in that: the glancing light source that forms glancing light is positioned at footprint Width both sides, and the length direction in glancing light source is consistent with the length direction of footprint.
4. the shooting style of a kind of on-the-spot footprint according to claim 3, is characterized in that: glancing light is plunderred and penetrated in target area and the glancing light of footprint both sides can mutually compensate the whole of footprint can be thrown light on accordingly.
5. the shooting style of a kind of on-the-spot footprint according to claim 4, is characterized in that: list structure is taked in the glancing light source that forms glancing light.
6. the shooting style of a kind of on-the-spot footprint according to claim 5, is characterized in that: collimating mirror or calibration lens system are taked in the glancing light source that forms glancing light.
7. the shooting style of a kind of on-the-spot footprint according to claim 1, is characterized in that: diffuse in lighting environment, take area source to form and diffuse.
8. according to the shooting style of a kind of on-the-spot footprint described in claim 1 or 7, it is characterized in that: be positioned at footprint Width both sides as sending the area source diffusing, the length direction of area source is consistent with the length direction of footprint.
9. the shooting style of a kind of on-the-spot footprint according to claim 1, is characterized in that: formation glancing light and the light source diffusing all adopt white light source.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410117440.5A CN103838059B (en) | 2014-03-27 | 2014-03-27 | A kind of shooting style of on-the-spot footprint |
| EP15768081.0A EP3054419B1 (en) | 2014-03-27 | 2015-01-30 | Extraction method and extraction device for crime scene footprint through photographing |
| PCT/CN2015/071926 WO2015143948A1 (en) | 2014-03-27 | 2015-01-30 | Extraction method and extraction device for crime scene footprint through photographing |
| US15/187,755 US9990545B2 (en) | 2014-03-27 | 2016-06-20 | Extraction method and extraction device for crime scene footprint through photographing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410117440.5A CN103838059B (en) | 2014-03-27 | 2014-03-27 | A kind of shooting style of on-the-spot footprint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103838059A true CN103838059A (en) | 2014-06-04 |
| CN103838059B CN103838059B (en) | 2016-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410117440.5A Expired - Fee Related CN103838059B (en) | 2014-03-27 | 2014-03-27 | A kind of shooting style of on-the-spot footprint |
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| Country | Link |
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| CN (1) | CN103838059B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015143948A1 (en) * | 2014-03-27 | 2015-10-01 | 大连恒锐科技股份有限公司 | Extraction method and extraction device for crime scene footprint through photographing |
| CN110908219A (en) * | 2019-12-24 | 2020-03-24 | 大连恒锐科技股份有限公司 | Portable on-spot reconnaissance device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1351858A (en) * | 2001-12-17 | 2002-06-05 | 山东省公安厅物证鉴定研究中心 | Method for revealing trace on non-planar smooth object |
| CN202166778U (en) * | 2011-06-13 | 2012-03-14 | 上海恒光警用器材有限公司 | A photomicrographic device for evidences at the scene |
| CN102608840A (en) * | 2012-04-01 | 2012-07-25 | 逯磊 | Glancing incidence light source |
-
2014
- 2014-03-27 CN CN201410117440.5A patent/CN103838059B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1351858A (en) * | 2001-12-17 | 2002-06-05 | 山东省公安厅物证鉴定研究中心 | Method for revealing trace on non-planar smooth object |
| CN202166778U (en) * | 2011-06-13 | 2012-03-14 | 上海恒光警用器材有限公司 | A photomicrographic device for evidences at the scene |
| CN102608840A (en) * | 2012-04-01 | 2012-07-25 | 逯磊 | Glancing incidence light source |
Non-Patent Citations (3)
| Title |
|---|
| 李泰山: "综合利用照相提取低反差足迹方法", 《中国刑警学院学报》, no. 4, 31 December 2003 (2003-12-31), pages 37 - 38 * |
| 翁南洲等: "水迹鞋印形成特点及拍摄技术", 《警官技术》, no. 1, 31 January 2004 (2004-01-31), pages 35 - 36 * |
| 胡子威等: "痕迹图像背景干扰的抑制方法", 《江苏警官学院学报》, vol. 23, no. 4, 31 July 2008 (2008-07-31), pages 181 - 184 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015143948A1 (en) * | 2014-03-27 | 2015-10-01 | 大连恒锐科技股份有限公司 | Extraction method and extraction device for crime scene footprint through photographing |
| CN110908219A (en) * | 2019-12-24 | 2020-03-24 | 大连恒锐科技股份有限公司 | Portable on-spot reconnaissance device |
| CN110908219B (en) * | 2019-12-24 | 2021-09-10 | 大连恒锐科技股份有限公司 | Portable on-spot reconnaissance device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103838059B (en) | 2016-09-28 |
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