CN113221849A - Fingerprint acquisition method - Google Patents
Fingerprint acquisition method Download PDFInfo
- Publication number
- CN113221849A CN113221849A CN202110643564.7A CN202110643564A CN113221849A CN 113221849 A CN113221849 A CN 113221849A CN 202110643564 A CN202110643564 A CN 202110643564A CN 113221849 A CN113221849 A CN 113221849A
- Authority
- CN
- China
- Prior art keywords
- fingerprint
- identified
- acquisition method
- crop
- camera
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000003595 mist Substances 0.000 claims abstract description 26
- 238000009826 distribution Methods 0.000 claims abstract description 18
- 238000009304 pastoral farming Methods 0.000 claims description 4
- 230000000295 complement effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 10
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 241000219109 Citrullus Species 0.000 description 9
- 235000012828 Citrullus lanatus var citroides Nutrition 0.000 description 9
- 239000000463 material Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 235000013399 edible fruits Nutrition 0.000 description 2
- 230000005070 ripening Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 244000036905 Benincasa cerifera Species 0.000 description 1
- 235000011274 Benincasa cerifera Nutrition 0.000 description 1
- 244000241257 Cucumis melo Species 0.000 description 1
- 235000015510 Cucumis melo subsp melo Nutrition 0.000 description 1
- FJJCIZWZNKZHII-UHFFFAOYSA-N [4,6-bis(cyanoamino)-1,3,5-triazin-2-yl]cyanamide Chemical compound N#CNC1=NC(NC#N)=NC(NC#N)=N1 FJJCIZWZNKZHII-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 1
- 235000012055 fruits and vegetables Nutrition 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 210000001595 mastoid Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/20—Image preprocessing
- G06V10/22—Image preprocessing by selection of a specific region containing or referencing a pattern; Locating or processing of specific regions to guide the detection or recognition
Abstract
The invention relates to a fingerprint acquisition method, which comprises the following steps: fixing crops to be identified on a fixed support; a water mist generator is arranged on one side of the crop to be identified to humidify the part with the fingerprint on the crop to be identified; arranging a light distribution light source on the opposite side of the water mist generator, and enabling the light beam to distribute light to the part with the fingerprint at a glancing incidence angle; and arranging a camera on the opposite side of the part with the fingerprint on the crop to be identified to collect the fingerprint image. The invention has the beneficial effects that: clear fingerprint lines are formed at the parts of the crops with fingerprints, the characteristics of the lines are clear and can be distinguished, and the identification requirement is met, so that the suspect can be determined in an auxiliary manner, and the showing effect is better.
Description
Technical Field
The invention belongs to the technical field of fingerprint identification and inspection and identification, and particularly relates to a fingerprint acquisition method.
Background
With the continuous development of modern economic society, the living standard of people is also rapidly developed. Crops such as fruits and vegetables are not affected by factors such as specific seasons and environments, and can be planted on the spot through the greenhouse, so that the living needs of people can be met to the maximum extent.
Along with the continuous expansion of the scale, because the temperature and the humidity in the greenhouse are high, the greenhouse is unattended, the greenhouse is damaged to different degrees in the picking season as soon as every year, before the crops such as watermelon, wax gourd and the like are picked, so that the crops are damaged, and serious loss is brought to farmers.
Disclosure of Invention
In order to solve the problem of poor fingerprint appearance effect in the prior art, the invention provides a fingerprint acquisition method which has the characteristics of better appearance effect and the like.
According to the embodiment of the invention, the fingerprint acquisition method comprises the following steps:
fixing crops to be identified on a fixed support;
a water mist generator is arranged on one side of the crop to be identified to humidify the part with the fingerprint on the crop to be identified;
arranging a light distribution light source on the opposite side of the water mist generator, and enabling the light beam to distribute light to the part with the fingerprint at a glancing incidence angle;
and arranging a camera on the opposite side of the part with the fingerprint on the crop to be identified to collect a fingerprint image.
Further, the complementary angle of grazing incidence is 0 to 10 °.
Further, the distance from the camera to the location with the fingerprint is 30cm or more.
Further, the camera includes a digital camera with a macro lens.
Further, the fingerprint acquisition method further comprises the following steps: the angle of the light distribution light source is adjusted based on the contrast of fingerprint lines under the assistance of light distribution.
Further, the fingerprint acquisition method further comprises the following steps: if the fingerprint lines show excessive water stain on the whole piece, the piece is naturally dried and then humidified.
The invention has the beneficial effects that: humidifying the part with the fingerprint on the crop to be identified by a water mist generator; the opposite side of the water mist generator is provided with the light distribution light source, and the light beam is enabled to distribute light to the part with the fingerprint at a glancing incidence angle, so that clear fingerprint lines are formed at the part with the fingerprint of the crop, the line characteristics are clear and can be distinguished, the identification requirement is met, the determination of a suspect is assisted, and the display effect is better.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flowchart of a fingerprint acquisition method provided in accordance with an example embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides a fingerprint acquisition method, which specifically includes:
101. fixing crops to be identified on a fixed support;
102. a water mist generator is arranged on one side of the crop to be identified to humidify the part with the fingerprint on the crop to be identified;
103. arranging a light distribution light source on the opposite side of the water mist generator, and enabling the light beam to distribute light to the part with the fingerprint at a glancing incidence angle;
104. and arranging a camera on the opposite side of the part with the fingerprint on the crop to be identified to collect the fingerprint image.
Specifically, a layer of fine fluff is arranged on the surface of the watermelon before ripening and can be used as a crystallization nucleus of water mist, and when the water mist meets the fine fluff, water is condensed into small water drops on the top of the fluff. When a hand acts on the surface of the watermelon, the mastoid thread forming the fingerprint can press and break the fine fluff at the contact part, the broken end of the fine fluff can seep fine juice, and when water mist contacts the broken fluff part, the water mist can be condensed to form continuous water stain. The fingerprint part of condensed water mist is irradiated by an exploration lamp or a multiband light source, fine water drops can reflect and refract incident light to form glittering and translucent bright lines, continuous water is soaked under a certain angle to form mirror surface directional reflection, light reflection angles are different and cannot enter a camera lens, so that dark lines are displayed, and a bright background is formed under the reflection of the water drops on the top end of the fine hair no matter whether the color of the surface of the watermelon is the same or not. The camera is fixed above the reverse shooting frame by installing the reverse shooting frame, the fixing device or the bracket, and the part with the fingerprint is upward and faces the camera on the reverse shooting frame for fixing the fruits with villus or powder and the like which need to be treated, such as watermelon and the like before ripening.
Adding purified water into a normal-temperature water mist generator, placing the water mist generator on the left side or the right side of the watermelon, aligning a mist outlet pipe to the part of the watermelon with fingerprints, and humidifying the part suspected to be provided with the fingerprints by using a small amount of mist.
Light distribution light sources such as a material evidence light source or a multiband light source are fixed on the opposite side of the water mist generator, and white light or a proper waveband (color) is selected to carry out light distribution at a small deflection angle or a grazing incidence angle. Under the light distribution irradiation of the side light source, clear fingerprint lines can be seen at an angle vertical to the shot surface, the line features are clear and distinguishable, the identification requirement is met, and the display is successful. Therefore, the camera is used for taking pictures in proportion to obtain clear fingerprint images, the fingerprint effect is better, and the case detection is more facilitated.
In some embodiments of the invention, the grazing incidence complementary angle is 0-10 degrees, and the finger print line contrast is observed under the assistance of light distribution while humidifying, the angle and the position of the light distribution are adjusted in time, and the fingerprint with identification conditions is fixed by proportion photography. The user can adjust the incident angle according to the different effects displayed, and the invention is not limited herein.
The distance from the camera to the portion with the fingerprint is 30cm or more. The setting of the distance between the camera and the lens can be more than 30cm, so that the phenomenon that water mist is condensed on the lens of the camera when the water mist is sprayed to influence the imaging effect can be avoided.
Wherein the camera comprises a digital camera with a macro lens. In specific implementation, the existing professional camera with the macro lens (the macro lens of the household camera is greatly deformed) can be selected to shoot the fingerprint image, so that the obtained fingerprint image is clearer and has better effect.
If the fingerprint lines excessively appear to form whole water stain, naturally drying and then humidifying; if the fingerprint can not be displayed for a long time, the mist output of the water mist can be increased; the specific spraying amount can be adjusted by the user according to the actual situation, and the invention is not limited herein.
Further for the presentation effects include: under a light distribution light source, a piece of water stain is seen, and fingerprint lines cannot be distinguished as showing failure because the water mist adding time is too long or the mist amount is too large, and the fingerprint lines need to be naturally aired and then show again.
If some lines are visible, the contrast is not obvious, and the display needs to be continued for too short display time or too small fog amount.
If the display area is full bright and has no dark lines, the selection area is wrong, and no fingerprint exists in the area.
If the periphery of the display area is a bright area, small water drops on fluff can be seen, the fingerprint area is completely dark water stain, and the cover is displayed more than twice, so that the cover is a moving scratch in the process of leaving the handprint, and the handprint has no identification condition and display condition.
If the appearing area is water stain, the ripeness of the melon and fruit is too high, the fluff and the powder fall off, or the fluff and the powder layer are wiped off, and the object is not suitable for the identification method.
If bright water drops are uniformly distributed in the whole area and do not form lines, and the gaps between the water drops are dark water spots, the fluff on the surface is too sparse, so that the method is not suitable.
According to the fingerprint acquisition method provided by the embodiment of the invention, the crops such as ripe watermelons and the like to be treated are fixed on the reverse shooting frame, the suspected fingerprint part is upward, the camera is adjusted far after the distance and the angle are adjusted on the reverse shooting frame fixed with the camera, a light source is prepared, a side light glancing incidence light distribution method is selected, meanwhile, the dark field light distribution is selected, the humidifier is started, the suspected fingerprint part is humidified by using small fog amount, meanwhile, the contrast of fingerprint lines is observed, the angle and the position of the light distribution are timely adjusted, and the proportion photography is fixed. The reflection and refraction phenomena on the surface of the water drop can effectively eliminate the influence of the patterns on the surface of the watermelon, thereby achieving better display effect. Meanwhile, the evidence problem of the case is cracked, the crimes are effectively struck, the benefits of farmers are protected, and the production and security order of the society is maintained.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
What has been described above includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, to the extent that the term "includes" is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term "comprising" as "comprising" is interpreted when employed as a transitional word in a claim. Furthermore, any use of the term "or" in the specification of the claims is intended to mean a "non-exclusive or".
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (6)
1. A fingerprint acquisition method, comprising:
fixing crops to be identified on a fixed support;
a water mist generator is arranged on one side of the crop to be identified to humidify the part with the fingerprint on the crop to be identified;
arranging a light distribution light source on the opposite side of the water mist generator, and enabling the light beam to distribute light to the part with the fingerprint at a glancing incidence angle;
and arranging a camera on the opposite side of the part with the fingerprint on the crop to be identified to collect a fingerprint image.
2. The fingerprint acquisition method according to claim 1, wherein the complementary angle of grazing incidence is 0 to 10 °.
3. The fingerprint acquisition method according to claim 1, wherein a distance from the camera to the location with the fingerprint is 30cm or more.
4. The fingerprint acquisition method of claim 1, wherein the camera comprises a digital camera with a macro lens.
5. The fingerprint acquisition method according to claim 1, further comprising: the angle of the light distribution light source is adjusted based on the contrast of fingerprint lines under the assistance of light distribution.
6. The fingerprint acquisition method according to claim 5, further comprising: if the fingerprint lines show excessive water stain on the whole piece, the piece is naturally dried and then humidified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110643564.7A CN113221849A (en) | 2021-06-09 | 2021-06-09 | Fingerprint acquisition method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110643564.7A CN113221849A (en) | 2021-06-09 | 2021-06-09 | Fingerprint acquisition method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113221849A true CN113221849A (en) | 2021-08-06 |
Family
ID=77083492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110643564.7A Pending CN113221849A (en) | 2021-06-09 | 2021-06-09 | Fingerprint acquisition method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113221849A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112487863A (en) * | 2020-10-28 | 2021-03-12 | 广东省大湾区华南理工大学聚集诱导发光高等研究院 | Fingerprint extraction and identification system and method based on fluorescent material |
| CN112712027A (en) * | 2020-12-29 | 2021-04-27 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device, display screen module and electronic equipment |
-
2021
- 2021-06-09 CN CN202110643564.7A patent/CN113221849A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112487863A (en) * | 2020-10-28 | 2021-03-12 | 广东省大湾区华南理工大学聚集诱导发光高等研究院 | Fingerprint extraction and identification system and method based on fluorescent material |
| CN112712027A (en) * | 2020-12-29 | 2021-04-27 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device, display screen module and electronic equipment |
Non-Patent Citations (5)
| Title |
|---|
| 肖露: "仿生熏显器结合紫外反射法显现客体上的汗潜手印", 《广东公安科技》 * |
| 肖露: "仿生熏显器结合紫外反射法显现客体上的汗潜手印", 《广东公安科技》, 31 December 2019 (2019-12-31), pages 45 - 48 * |
| 苏传三: "水雾法显现成熟前西瓜上的指印", 《刑事技术》, pages 46 - 47 * |
| 郭卫平: "浅灰白色亚光油漆面微弱加层灰层指印的提取", 《广东公安科技》, 31 December 2008 (2008-12-31), pages 75 - 76 * |
| 郭卫平: "浅灰白色亚光油漆面微弱加层灰层指印的提取", 《广东公安科技》, pages 75 - 76 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104504112B (en) | Movie theatre information acquisition system | |
| CA2457090C (en) | Eye tracking systems | |
| US7154540B2 (en) | System for enhancing video | |
| US5489886A (en) | Automatic line officiating system and method thereof | |
| US20170167832A1 (en) | Dart game apparatus having plurality of cameras and computer program stored in computer-readable medium | |
| EP0683961B1 (en) | Apparatus and method for detecting, identifying and incorporating advertisements in a video | |
| CN106407914A (en) | Method for detecting human faces, device and remote teller machine system | |
| CN107463877A (en) | Method for collecting iris, electronic installation and computer-readable recording medium | |
| US20070085908A1 (en) | A method and apparatus for enhancing the broadcast of a live event | |
| JP7165909B2 (en) | Image synthesizing device, iris authentication system, image synthesizing method, and iris authentication method | |
| US20100325647A1 (en) | Methods and apparatus for indirect illumination in electronic media rating systems | |
| CN107181918A (en) | A kind of dynamic filming control method and system for catching video camera of optics | |
| CN102737233A (en) | Dark background optical fingerprint acquisition device | |
| CN202632317U (en) | Dark-background optical fingerprint acquisition device | |
| CN107589551B (en) | A kind of multiple aperture polarization imaging device and system | |
| CN103514429B (en) | Detect the method and image processing equipment of the privileged site of object | |
| CN101715070B (en) | Method for automatically updating background in specifically monitored video | |
| CN109000578A (en) | A kind of building curtain wall wind pressure deformation monitoring method that the whole audience is contactless | |
| CN109961039A (en) | A kind of individual's goal video method for catching and system | |
| CN104182972B (en) | Ball firing automatic scoring round target system and method under a kind of field complex illumination | |
| CN113221849A (en) | Fingerprint acquisition method | |
| Shi et al. | An AI-based curling game system for winter Olympics | |
| CN110889810A (en) | Method and system for extracting image through light filtering film based on polarization | |
| CN110517217A (en) | Computer overall data identifying platform | |
| CN106250544B (en) | A kind of search method and device of video data |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |