CN213276693U - Non-contact finger and palm print acquisition device - Google Patents
Non-contact finger and palm print acquisition device Download PDFInfo
- Publication number
- CN213276693U CN213276693U CN202022669983.1U CN202022669983U CN213276693U CN 213276693 U CN213276693 U CN 213276693U CN 202022669983 U CN202022669983 U CN 202022669983U CN 213276693 U CN213276693 U CN 213276693U
- Authority
- CN
- China
- Prior art keywords
- finger
- palm
- area
- array camera
- fingerprint
- 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.)
- Active
Links
Images
Abstract
The utility model discloses a non-contact indicates palm print collection system, include: the device comprises a first shooting mechanism, a second shooting mechanism and a shell; the first shooting mechanism and the second shooting mechanism are arranged on a supporting structure in the shell, and a finger placing area and a palm placing area are arranged outside the shell; the first shooting mechanism comprises a rotating device, a linear array camera arranged on the rotating device and a first lighting light column with a preset angle; the second shooting mechanism comprises a mobile device, an area-array camera installed on the mobile device and a second lighting light column with a preset angle. The linear array camera rotates around the fingerprint surface to scan and shoot the fingerprint in all directions, and a high-quality large-area 2D fingerprint image of the fingerprint surface is directly obtained; shooting a main palm print and a side palm print by a movable area-array camera, and obtaining images of the main palm print and the side palm print by one-time shooting without moving a palm; the two shooting mechanisms are integrated through the shell, so that the comprehensive collection performance of the fingerprint and palm print is improved.
Description
Technical Field
The utility model belongs to indicate palm line to gather the field, a non-contact indicates palm line collection system is related to.
Background
Most conventional finger and palm print image capture systems for police systems, security, customs and entry and exit rely on physical contact between the fingers and palm and the finger and palm print capture device. When a high quality, complete, large area fingerprint is desired, the fingers and palm need to be rolled from side to side on the fingerprint acquisition device to increase the total contact area. When such devices are used by unskilled and non-compliant acquirers, the additional force for acquisition often results in large deformations and distortions of the fingerprints and palm prints, and the acquirers may move the fingers or palms intentionally or unintentionally during the acquisition process causing the acquired images of the fingerprints to be blurred, thereby failing in acquisition. These problems greatly increase the difficulty and time for acquiring large-area and high-quality finger and palm prints, resulting in poor user experience. The contact type fingerprint and palm print acquisition instrument not only has low acquisition speed, but also causes the worry of people on the aspect of sanitation.
In some non-contact fingerprint and finger and palm print acquisition methods, for example, after multiple area-array cameras or 3D depth cameras (such as binocular cameras or three-dimensional cameras) are combined with structured light for shooting, images need to be processed and adjusted by a large amount of post software (such as a method of performing 3D modeling and then expanding to convert into 2D images or image splicing), splicing traces can appear in generated images, and the images are matched with real objects with large differences. The quality of the fingerprint and palm print images collected by the non-contact fingerprint device and the fingerprint and palm print collecting device is not good enough, the collected fingerprint area is limited, and the reliability problem exists.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the purpose is: the utility model provides a shoot the fingerprint and shoot the non-contact finger palm print collection system of main palm print and side palm print through the area array camera around the fingerprint face through the linear array camera, to the fingerprint, through can all-round scanning shoot the fingerprint around fingerprint face rotation, directly obtain finger fingerprint face 2D fingerprint image, obtain higher image quality, obtain the fingerprint image of bigger area, to the palm print, can once only shoot and acquire main palm print and side palm print image without removing the palm, be the integrated fingerprint, main palm print, the collection equipment of side palm print, the very big degree has improved the comprehensive collection performance of finger palm print.
The technical scheme of the utility model is that: a non-contact fingerprint and palm print acquisition device comprising: the device comprises a first shooting mechanism, a second shooting mechanism and a shell; the first shooting mechanism and the second shooting mechanism are arranged on a supporting structure in the shell, a finger placing area and a palm placing area are arranged outside the shell, the finger placing area corresponds to the shooting position of the first shooting mechanism, and the palm placing area corresponds to the shooting position of the second shooting mechanism;
the first shooting mechanism comprises a rotating device, a linear array camera installed on the rotating device and a first lighting light column with a preset angle; the rotating device drives the linear array camera and the first lighting light column to rotate around the finger placement area, the linear array camera is triggered to scan and shoot a finger fingerprint surface in the rotating process, and the first lighting light column is aligned to the shot finger fingerprint surface in the rotating process;
the second shooting mechanism comprises a mobile device, an area array camera installed on the mobile device and a second lighting light column with a preset angle; the mobile device drives the area-array camera and the second lighting light column to move in parallel with the palm placing area and incline towards the palm placing area at the two side stop positions, the area-array camera is triggered to shoot the palm grain surface when the area-array camera moves to the palm center position and the two side stop positions, and the second lighting light column is aligned with the shot palm grain surface.
The further technical scheme is as follows: the rotating device comprises a first mounting platform, a first stepping motor, a first synchronizing wheel, a first synchronizing belt and a first coding pulse trigger;
the output shaft of the first stepping motor is provided with the first synchronizing wheel and the first coded pulse trigger, and the first synchronizing belt is connected with the first mounting platform and the first synchronizing wheel; the first coding pulse trigger sends a first pulse trigger signal according to the rotation of the first stepping motor and is used for triggering the linear array camera to carry out scanning shooting; the first stepping motor drives the first synchronous wheel to rotate, the first synchronous wheel drives the first synchronous belt to transmit, the first synchronous belt drives the first mounting platform to rotate, and the first mounting platform is used for mounting the linear array camera and the first lighting light column.
The further technical scheme is as follows: a preset angle is preset between the plane where the lens of the linear array camera is located and the axis direction of the finger, and one side of the linear array camera close to the fingertip inclines towards the fingertip.
The further technical scheme is as follows: the finger placing device is characterized in that an automatic popping positioning mechanism is arranged in a finger placing area on the shell, the automatic popping positioning mechanism comprises a finger placing support capable of popping out and automatically resetting and an arc-shaped soft rubber finger clamping device, the arc-shaped soft rubber finger clamping device is used for clamping fingers on the finger placing support, a movable template corresponding to the positions of the fingertips is arranged on the finger placing support, and the movable template is automatically pulled out when the finger placing support is automatically reset.
The further technical scheme is as follows: the finger placing support comprises annular finger sleeves of different sizes, the annular finger sleeves are used for being sleeved on finger joints, the outer rings of the annular finger sleeves of different sizes are matched with the automatic popping positioning mechanism, the inner rings of the annular finger sleeves of different sizes are respectively matched with finger sizes of different thicknesses, the positions, sleeved on fingers, of the annular finger sleeves correspond to the positions of the circular arc-shaped soft rubber finger clamping devices, and the annular finger sleeves correspond to the positions of the shell when the finger placing support resets.
The further technical scheme is as follows: still include the sucking disc installing support in the casing, install the sucking disc device on the sucking disc installing support, the finger back of the body position of sucking disc device correspondence finger, the fixed finger back of the body of finger of suction that the sucking disc device produced through the negative pressure.
The further technical scheme is as follows: the mobile device comprises a second mounting platform, a second stepping motor, a second synchronous wheel, a second synchronous belt and a second coding pulse trigger;
the output shaft of the second stepping motor is provided with the second synchronous wheel and the second coding pulse trigger, and the second synchronous belt is connected with the second mounting platform and the second synchronous wheel; the second coding pulse trigger sends a second pulse trigger signal according to the rotation of the second stepping motor and is used for triggering the area-array camera to shoot; the second step motor drives the second synchronizing wheel rotates, the second synchronizing wheel drives the second synchronous belt transmission, the second synchronous belt drives the second mounting platform moves and stops moving at two side stop positions, and the second mounting platform is used for mounting the area array camera and the second lighting light beam.
The further technical scheme is as follows: the mobile device further comprises a tilt control device, and the tilt control device is used for controlling the second mounting platform to tilt to a preset tilt angle.
The further technical scheme is as follows: the palm placing area on the shell is a transparent supporting plane, and the transparent supporting plane is parallel to the shooting plane of the area-array camera on the second mounting platform;
the palm placing area is provided with photosensitive tubes arranged according to a preset interval, and the photosensitive tubes are used for determining the size and the position of the palm according to the number of the photosensitive tubes shielded by the palm.
The further technical scheme is as follows: and the stop positions of the two sides of the second mounting platform are determined according to the size and the position of the palm and the preset inclination angle of the second mounting platform.
The further technical scheme is as follows: the palm of casing is placed the outside in region and is set up palm stop device, palm stop device is including corresponding four gag lever posts of finger joint root for the guide palm is placed according to predetermined position.
The further technical scheme is as follows: the non-contact finger and palm print collecting device further comprises an air bag, and the air bag is used for automatically descending and pressing on the back of the hand after the palm is placed.
The utility model has the advantages that:
1. the linear array camera rotates around the fingerprint surface to scan and shoot fingerprints in all directions, so that the problems of image splicing and humming caused by processing and adjusting of a large amount of post-software after shooting by adopting a plurality of area array cameras or 3D depth cameras and large difference of image matching with a real object are solved, a 2D fingerprint image of the fingerprint surface of the finger can be directly obtained, higher image quality is obtained, and a fingerprint image with a larger area is obtained; the main palm print and the side palm print are shot by the movable area-array camera, and the main palm print and the side palm print can be shot at one time without moving a palm; the two shooting mechanisms are integrated into a whole through the shell, and are combined into comprehensive acquisition equipment for fingerprints, main palm prints and side palm prints, so that the comprehensive acquisition performance of the finger and palm prints is greatly improved;
2. the plane of a lens of the linear array camera is inclined towards the fingertip by presetting a preset angle between the plane and the axis direction of the finger, so that the grains of the fingertip can be considered in the rotary shooting process of the linear array camera;
3. by arranging the annular finger sleeves with different sizes, the outer rings of the annular finger sleeves are matched with the finger placing support, and the inner rings of the annular finger sleeves are suitable for finger sizes with different thicknesses, so that the finger placing support can be fixed for different finger sizes, the fingers are prevented from moving in the acquisition process, and the image quality of fingerprint acquisition is ensured;
4. the finger back is fixed through the sucker device, so that the finger can be further kept fixed, and the image quality of fingerprint acquisition is ensured;
5. the palm is prevented from being suspended in the air by pressing the back of the hand through the air bag, so that the palm print collection quality is ensured.
Drawings
The invention will be further described with reference to the following drawings and examples:
FIG. 1 is a schematic structural diagram of a non-contact fingerprint and palm print collecting device provided by the present application;
FIG. 2 is a schematic side view of a non-contact fingerprint and palm print collecting device provided in the present application;
FIG. 3 is a schematic view of a rotating device and a moving device provided in one embodiment of the present application;
FIG. 4 is a schematic view of a rotating device and a moving device provided in another embodiment of the present application;
FIG. 5 is a schematic view of a first camera mechanism provided herein;
FIG. 6 is a schematic illustration of fingerprint acquisition as provided herein;
FIG. 7 is a schematic diagram of a linear camera movement for fingerprint acquisition provided by the present application;
FIG. 8 is a schematic view of the illumination of a fingerprint acquisition as provided herein;
FIG. 9 is a schematic view of an auto-eject positioning mechanism for fingerprint acquisition as provided herein;
FIG. 10 is a schematic illustration of a palm print acquisition as provided herein;
FIG. 11 is a schematic diagram of the movement of an area-array camera for palm print acquisition provided by the present application;
FIG. 12 is a schematic view of the illumination provided by the present application for palm print acquisition;
fig. 13 is a schematic illustration of palm compression for palm print acquisition as provided herein.
Wherein: 10. a first photographing mechanism; 11. a rotating device; 111. a first mounting platform; 112. a first stepper motor; 12. a line camera; 13. a first illumination beam; 20. a second photographing mechanism; 21. a mobile device; 211. a second mounting platform; 212. a second stepping motor; 22. an area-array camera; 23. a second illumination beam; 24. an air bag; 30. a housing; 31. a support structure; 32. a finger placing bracket; 33. the circular arc-shaped soft rubber finger clamping device; 34. a movable template; 35. a sucker mounting bracket; 36. a transparent support plane; 37. palm stop device.
Detailed Description
Example (b): in order to solve the inconvenient problem of contact finger print collection mode, this application provides a non-contact finger print collection system, refer to fig. 1 to 13 in combination, this non-contact finger print collection system includes: a first imaging mechanism 10, a second imaging mechanism 20, and a housing 30; the first photographing mechanism 10 and the second photographing mechanism 20 are mounted on a support structure 31 in the housing 30, a finger placing area and a palm placing area are provided outside the housing 30, the finger placing area corresponds to a photographing position of the first photographing mechanism 10, and the palm placing area corresponds to a photographing position of the second photographing mechanism 20.
The first shooting mechanism 10 comprises a rotating device 11, a linear array camera 12 installed on the rotating device 11 and a first illumination light column 13 with a preset angle; the rotating device 11 drives the linear array camera 12 and the first lighting light column 13 to rotate around the finger placement area, the linear array camera 12 is triggered to scan and shoot the finger fingerprint surface in the rotating process, and the first lighting light column 13 is aligned to the shot finger fingerprint surface in the rotating process.
The angle of the first lighting light column 13 is adjusted in advance according to the distance between the linear array camera 12 and the finger placement area and the installation position of the first lighting light column 13, so that the first lighting light column 13 and the linear array camera 12 rotate synchronously, and the lighting area of the first lighting light column 13 is always aligned with the shooting area of the linear array camera 12. As shown in the figure, a plurality of first illumination light columns 13 with preset angles are aligned with the same shooting target position with the line camera 12 to increase the illumination. The number and position of the first lighting columns 13 can be selected according to the actual requirements.
Optionally, the rotating device 11 comprises a first mounting platform 111, a first stepper motor 112, a first synchronizing wheel, a first synchronizing belt, and a first coded pulse trigger.
A first synchronous wheel and a first coding pulse trigger are installed on an output shaft of the first stepping motor 112, and a first synchronous belt is connected with the first installation platform 111 and the first synchronous wheel; the first encoding pulse trigger sends a first pulse trigger signal according to the rotation of the first stepping motor 112, and is used for triggering the linear array camera 12 to perform scanning shooting; the first stepping motor 112 drives the first synchronous wheel to rotate, the first synchronous wheel drives the first synchronous belt to transmit, the first synchronous belt drives the first mounting platform 111 to rotate, and the first mounting platform 111 is used for mounting the linear array camera 12 and the first lighting light column 13.
In practical applications, the first stepping motor 112 may be installed at the bottom of the housing 30, and the first installation platform 111 is driven to rotate by the first synchronizing wheel and the first synchronizing belt, so as to drive the linear array camera 12 and the first lighting light pillar 13 to integrally rotate.
In practical application, the first synchronous belt can be connected with the arc-shaped mechanism on the first mounting platform 111, and in the transmission process of the first synchronous belt, the arc-shaped mechanism is driven to move according to an arc-shaped route, so that the first mounting platform 111 is driven to rotate. Illustratively, the first mounting platform 111 and the arc mechanism are integrally connected through the supporting structure 31, respectively disposed at two sides of the supporting structure 31, and can be driven by the first synchronous belt to synchronously rotate around the connection position on the supporting structure 31.
The first encoding pulse trigger is installed together with the output shaft of the first stepping motor 112, for example, the output shaft of the first stepping motor 112 rotates for one circle, the first encoding pulse trigger sends 2500 pulse signals, and each pulse signal triggers the line camera 12 to shoot once, so that when the first stepping motor 112 drives the line camera 12 to rotate, the line camera 12 can continuously shoot, and generally, all the acquisition of fingerprint surfaces can be completed within several seconds. The line graph is acquired by shooting once by the line scan camera 12, and the lines continuously shot in the rotating process form a plane finally to obtain a finger fingerprint image. Adopt the linear array camera 12 rotation to shoot the fingerprint around the fingerprint face, not only have the faster advantage of speed, general continuous action collection speed is less than 3s, can all-round scanning shoot complete fingerprint moreover, directly obtain the 2D fingerprint image of finger fingerprint face, obtain higher image quality, obtain the fingerprint image of bigger area, it is good to the collection repeatability many times of same finger fingerprint, be superior to pressing down the seal roll formula fingerprint collection mode.
The aperture of the line camera lens has an F-number of 4-12, where the F-number is the ratio of the focal length of the line camera lens to the diameter of the entrance pupil, a large F-number corresponds to a small aperture, increasing the depth of field, thus accommodating different finger thicknesses, while still allowing a sharp image of the fingerprint to be acquired, but if the F-number is too large, too little light enters the camera, resulting in insufficient illumination being provided, thus using an F-number in the range of 4-12 to balance the large depth of field with good illumination.
The rotation angle of the rotating device 11 is preset and is controlled by the first stepping motor in a subdivision mode, so that the linear array camera 12 rotates around the fingerprint surface stably and is triggered to shoot synchronously.
It should be noted that, in practical application, the first shooting mechanism further includes a necessary power supply device and a control device, the power supply device is used for supplying power for the work of each component, the control device can be used for controlling the rotation of the motor, receiving a trigger signal and controlling the shooting of the linear array camera 12, the linear array camera 12 can also be connected with an upper computer, and the acquired image is uploaded to the upper computer for further image processing.
Optionally, a predetermined angle is preset between a plane where a lens of the line camera 12 is located and the axis direction of the finger, and one side of the line camera 12 close to the fingertip inclines towards the fingertip.
In order to take account of the fingerprint shooting of the finger tip, the lens of the linear array camera 12 is slightly inclined towards the finger tip, so that the fingerprint of the finger surface and the fingerprint of the finger tip can be shot simultaneously, and the fingerprint with a larger area is obtained. Illustratively, the angle between the plane of the lens of the line camera 12 and the axis direction of the finger is about 10 °.
Optionally, an automatic pop-up positioning mechanism is arranged in the finger placement area on the casing 30, the automatic pop-up positioning mechanism includes a finger placement support 32 capable of popping up and automatically resetting and an arc-shaped soft rubber finger clamping device 33, the arc-shaped soft rubber finger clamping device 33 is used for clamping a finger on the finger placement support 32, a movable template 34 corresponding to the position of the fingertip is arranged on the finger placement support 32, and the movable template 34 is automatically pulled away when the finger placement support 32 is automatically reset.
As shown in the figure, exemplarily, the arc-shaped soft rubber finger clamping device 33 is arranged above the finger placing support 32, and after the finger is placed on the finger placing support 32, the arc-shaped soft rubber finger clamping device 33 automatically descends to press the finger to fix the position of the finger, so that the finger is ensured to be in the fingerprint collection area, and the finger is prevented from moving in the fingerprint collection process.
The movable template 34 arranged on the finger placing support 32 can be automatically pulled away when the finger placing support 32 is reset, so that the finger and the linear array camera 12 are completely not shielded, and the fingerprint collection quality is ensured.
Optionally, a through hole is formed in the side surface of the housing 30 corresponding to the finger placement area, and the automatic ejection positioning mechanism is ejected or reset through the through hole.
Optionally, the non-contact finger and palm print collecting device further comprises: annular dactylotheca of unidimensional, annular dactylotheca are used for the cover on pointing the joint, and the outer lane and the auto-eject positioning mechanism of annular dactylotheca of unidimensional match, and the finger size of different thicknesses is matchd respectively to the inner circle of the annular dactylotheca of unidimensional, and the position of annular dactylotheca cover on pointing corresponds the position of convex flexible glue finger screens device 33, and the annular dactylotheca corresponds the position of casing 30 when the support 32 resets being pointed.
The annular finger stall has certain thickness, and the size of outer lane is unanimous, can be oval, and finger screens device 33's circular arc inner wall phase-match with convex flexible glue, the inner circle sets up different sizes to adapt to different fingers thickness. Match fixedly with pop-up positioning mechanism through annular dactylotheca, not only can keep pointing further to keep the rigidity at the collection in-process, and can control the finger head unsettled, avoid the germ cross propagation that equipment caused in different people's use, at fingerprint collection in-process, because it is narrow and small that the finger is placed regionally, be difficult to the clearance, use through disposable annular dactylotheca, the fingerprint is at the collection in-process and need pass through annular dactylotheca spaced apart with the region of equipment contact, the health of gathering the environment has been kept, and the disinfection can be retrieved to annular dactylotheca, the cycle uses.
In practical application, the finger placing support 32 pops out, fingerprint collection starts, fingerprints of appointed fingers can be collected through language or display prompts, a suitable annular finger sleeve is sleeved on the finger sleeve, when the finger placing support is placed at an accurate position, the circular arc-shaped soft rubber finger clamping device 33 automatically descends to locate the collected fingers, the finger placing support 32 automatically resets, the movable template 34 is automatically pulled away, the collected fingers are enabled not to be shielded from the linear array camera 12, the rotating device 11 is immediately started, and the linear array camera 12 is driven to start rotating, scanning and fingerprint collection.
Optionally, the casing 30 further includes a suction cup mounting bracket 35, a suction cup device is mounted on the suction cup mounting bracket 35, the suction cup device corresponds to the finger back position of the finger, and the suction cup device fixes the finger back through suction force generated by negative pressure.
Because the user of finger palm print collection device is criminal suspect usually, in order to avoid the user not to cooperate indiscriminate finger influence fingerprint collection at the collection in-process, can also install sucking disc device additional above the finger for catch by the people's of gathering finger, avoid the finger to remove at the collection in-process. The suction cup device can correspond to the suction cup and the connected air extractor, negative pressure is generated in the suction cup area through the air extractor, so that fingers can be sucked, and correspondingly, in order to keep the equipment sanitary, the suction cup can be replaced after being used once.
The second shooting mechanism 20 comprises a mobile device 21, an area-array camera 22 installed on the mobile device 21, and a second illumination light beam 23 with a preset angle; the moving device 21 drives the area array camera 22 and the second lighting light column 23 to move parallel to the palm placing area and incline towards the palm placing area at the two side stop positions, and triggers the area array camera 22 to shoot the palm print surface when moving to the palm center position and the two side stop positions, and the second lighting light column 23 is aligned with the shot palm print surface.
The main palm print and the side palm print are shot by moving the area-array camera 22, so that the physical contact mode between the palm and the optical equipment is changed, and the difficulty and time for acquiring the palm print with large area and high quality are reduced.
The angle of the second illumination light column 23 is adjusted in advance according to the distance between the area-array camera 22 and the palm placing area and the installation position of the second illumination light column 23, so that the second illumination light column 23 and the area-array camera 22 move synchronously, and the illumination area of the second illumination light column 23 is always aligned to the shooting area of the area-array camera 22. As shown in the figure, a plurality of second illumination light beams 23 with preset angles are aligned with the same shooting target position with the area-array camera 22 to increase the illumination. The number and position of the second lighting columns 23 can be selected according to the actual requirements.
Optionally, the moving device 21 includes a second mounting platform 211, a second stepping motor 212, a second synchronous wheel, a second synchronous belt, and a second coded pulse trigger.
A second synchronous wheel and a second coding pulse trigger are installed on an output shaft of the second stepping motor 212, and the second synchronous belt is connected with the second installation platform 211 and the second synchronous wheel; the second encoding pulse trigger sends a second pulse trigger signal according to the rotation of the second stepping motor 212, and is used for triggering the area array camera to shoot; the second stepping motor 212 drives the second synchronous wheel to rotate, the second synchronous wheel drives the second synchronous belt to transmit, the second synchronous belt drives the second mounting platform 211 to move and stop moving at the stop positions at two sides, and the second mounting platform 211 is used for mounting the area array camera 32 and the second lighting light beam 33.
In practical applications, the second stepping motor 212 may be installed at the bottom of the housing 30, and the second synchronous pulley and the second synchronous belt drive the second installation platform 211 to translate, so as to drive the area-array camera 22 and the second illumination light beam 23 to translate integrally. Although not shown in the drawings, in practical applications, the movement of the second mounting platform 211 can be controlled by engaging a gear with a belt, and pulling the gear and the belt under the transmission of the second synchronous belt. Exemplarily, the second synchronous belt may be fixedly connected to one side of the second mounting platform 211, pass through the elongated structure at the bottom of the second mounting platform 211, bypass the second synchronous wheel, and be fixedly connected to the other side of the second mounting platform 211, so that when the second synchronous wheel drives the second synchronous belt, the second synchronous belt may drive the second mounting platform 211 to move horizontally. Alternatively, the translation of the second mounting platform 211 may be realized by means of a lead screw.
Optionally, in practical applications, the second mounting platform 211 may move left and right or back and forth on a horizontal plane to adjust the position, and may also move in a vertical direction to adjust the height.
The second coded pulse trigger is installed together with an output shaft of the second stepping motor, exemplarily, the second stepping motor determines the number of turns of rotation according to the placement of a palm, adjusts the moving distance and the position of the area-array camera 22, and the second coded pulse trigger triggers the area-array camera 22 to shoot a main palm print when the area-array camera 22 moves to the corresponding palm center position, triggers the area-array camera 22 to shoot a side palm print when the area-array camera 22 moves to a side stop position, and triggers the area-array camera 22 to shoot a side palm print when the area-array camera 22 moves to a side stop position.
Optionally, the moving device 21 further comprises a tilt control device for controlling the second mounting platform 211 to tilt to a preset tilt angle.
For example, the preset inclination angle may be about 45 °.
Alternatively, the tilt control device may be a micro-motor disposed on the second mounting platform 211, and the micro-motor may control the movement of the second mounting platform 211, and adjust the rotation angle of the second mounting platform 211, so that the second mounting platform 211 tilts towards the corresponding palm side.
Optionally, the tilt control device may be two sliders disposed at two sides of the second mounting platform 211, and is configured to jack up a side of the slider corresponding to the second mounting platform 211 to a predetermined height according to a preset tilt angle of the second mounting platform 211.
Optionally, the palm rest area on the housing 30 is a transparent support plane 36, and the transparent support plane 36 is parallel to the shooting plane of the area-array camera 22 on the second mounting platform 211.
Optionally, the transparent support plane 36 may also be automatically popped up or reset to support the palm to shoot the palm print, and in order to enable the area-array camera 22 to shoot the clear palm print, the palm needs to be parallel to the shooting surface of the area-array camera 22, so that the transparent support plane 36 is parallel to the shooting surface of the area-array camera 22. In order to keep the equipment sanitary, the transparent support plane 36 can be sterilized and cleaned after one palm print collection is finished.
Optionally, the palm placing area is provided with photosensitive tubes arranged according to a preset interval, and the photosensitive tubes are used for determining the size and the position of the palm according to the number of the photosensitive tubes shielded by the palm. For example, the photosensitive tube arrays are arranged at intervals of 2mm, and after the palm is placed, the size and the position of the palm can be quickly calculated according to the number and the positions of the shielded photosensitive tubes, so as to determine the distance that the area-array camera needs to move to the center position and the stop positions at the two sides.
The stop positions of both sides of the second mounting platform 211 are determined according to the size and position of the palm and a preset inclination angle of the second mounting platform 211.
If the distance between the area-array camera 22 and the palm placing area is fixed, the position of the central point is determined according to the acquired size and position of the palm, the stop positions of the two sides can be calculated according to the width of the palm and the preset inclination angle, and the same shooting object distance needs to be kept when the main palm print and the side palm print are shot. The moving distance parameters of the mobile area-array camera 22 are determined according to the actual palm size, and the moving distances of the palms with different sizes can be calculated.
Optionally, a palm limiting device 37 is disposed outside the palm placing area of the casing 30, and the palm limiting device includes four limiting rods corresponding to the finger joints (between the thumb and the index finger, between the index finger and the middle finger, between the middle finger and the ring finger, and between the ring finger and the little finger) for guiding the palm to be placed according to a preset position. The stop 37 may be automatically ejected at the beginning of the palm print acquisition.
Optionally, the non-contact type finger-palm print collecting device further comprises an air bag 24, and the air bag 24 is used for automatically descending and pressing on the back of the hand after the palm is placed.
Optionally, the palm is after putting, and the palm center probably is unsettled, leads to gathering not reaching clear palm print image, in order to guarantee the collection quality, can press the palm through gasbag 24 and hug closely collection equipment. Alternatively, the air cell 24 may be inflated to increase the pressure on the back of the hand during use, or may be kept inflated to maintain the pressure on the back of the hand under the control of the lift.
In practical application, when palm print collection begins, appointed palm print is gathered in pronunciation or the demonstration suggestion, the support plane and the stop device auto-eject that the region was put to the palm, the palm puts the back in place, the support plane auto-reset that the region was put to the palm, wait for the gasbag to descend and push down the back of the hand, make the back of the hand be in the flat condition, start the area array camera simultaneously and carry out the shooting of main palm print, then remove the area array camera to both sides stop position, and slope area array camera, keep the shooting object distance the same with main palm print, shoot the side palm print.
In practical applications, the second shooting mechanism further includes a power supply device and a control device, the power supply device is used for supplying power for the operation of each component, and the control device can receive the recognition result of the photosensitive tube, calculate the moving distance and the stop position of the area array camera, control the operation and the reset of the equipment, control the descending time of the air bag, control the inclination of the area array camera, and the like.
Through the positioner that the restriction finger was put, the positioner that the restriction palm was put, the mechanism that the back of the hand was pressed to the measuring device and the gasbag of palm size for the finger palm print gathers the fingerprint of same finger and the repeatability of the palm print of unified palm many times and improves greatly. And the fingerprint image can be restored most truly through the linear array camera without image splicing and a large amount of post-software processing and adjustment.
The application also provides a non-contact type fingerprint and palm print acquisition method which is applied to the non-contact type fingerprint and palm print acquisition device and comprises the following three parts.
A fingerprint data acquisition section:
the linear array camera and the first lighting light column are driven by the rotating device to rotate for a preset angle around the finger placement area from a preset initial position, and scanning shooting is carried out simultaneously;
transmitting the finger fingerprint surface image acquired by the linear array camera to an upper computer;
preprocessing the finger fingerprint surface image by an upper computer, wherein the preprocessing comprises noise filtering and sharpness and saturation enhancement; performing edge identification on the preprocessed fingerprint image, and extracting a main area of the fingerprint; and carrying out normalized gray value limitation on the regional fingerprint image, separating foreground color and background color, enhancing fingerprint lines along the ridge line direction, removing holes and burrs in the fingerprint, and thinning the lines and outputting the 2D fingerprint image.
A palm print data acquisition section:
the area array camera and the second lighting light column are driven to move to the center position of the palm placing area through the moving device to shoot a main palm print image, the area array camera and the second lighting light column are driven to move to the stopping positions at two sides through the moving device and incline towards the palm placing area, and side palm print images at two sides are shot respectively;
transmitting the main palm print image and the side palm print image shot by the area array camera to an upper computer, and splicing to obtain a palm print surface image;
preprocessing the palm and palm print surface image by an upper computer, wherein the preprocessing comprises noise filtering and sharpness and saturation enhancement; performing edge recognition on the preprocessed palm print image, and extracting a main area of the palm print; and carrying out normalized gray value limitation on the regional palm print image, separating foreground color and background color, enhancing the palm print lines along the ridge line direction, removing holes and burrs in the palm print, thinning the texture and outputting a 2D palm print image.
A data storage portion;
and correspondingly storing the output 2D fingerprint image and the 2D palm print image and the identity information of the acquired person through the upper computer.
In summary, the non-contact fingerprint and palm print acquisition device provided by the application scans and shoots fingerprints in all directions by rotating the linear array camera around the fingerprint surface, so that the problems of image splicing and humming caused by processing and adjusting a large amount of post software after shooting by adopting a plurality of area array cameras or 3D depth cameras and large difference between images and real objects are avoided, a 2D fingerprint image of the fingerprint surface of a finger can be directly obtained, higher image quality is obtained, and a fingerprint image with a larger area is obtained; the main palm print and the side palm print are shot by the movable area-array camera, and the main palm print and the side palm print can be shot at one time without moving a palm; the two shooting mechanisms are integrated into a whole through the shell, and are combined into comprehensive acquisition equipment for fingerprints, main palmprints and side palmprints, so that the comprehensive acquisition performance of the fingerprints and palmprints is greatly improved.
In addition, a preset angle is preset between the plane where the lens of the linear array camera is located and the axis direction of the finger, and the lens is inclined towards the fingertip, so that the grains of the fingertip of the finger can be considered in the rotation shooting process of the linear array camera.
In addition, by arranging the annular finger sleeves with different sizes, the outer rings of the annular finger sleeves are matched with the finger placing supports, and the inner rings of the annular finger sleeves are suitable for finger sizes with different thicknesses, so that the finger placing supports can be kept fixed for different finger sizes, the fingers are prevented from moving in the acquisition process, and the image quality of fingerprint acquisition is ensured.
In addition, the finger back is fixed through the sucker device, so that the fixation of the finger can be further kept, and the image quality of fingerprint collection is ensured.
In addition, the palm is prevented from being suspended in the air in the collection process by pressing the back of the hand through the air bag, and the collection quality of the palm prints is ensured.
The terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying a number of the indicated technical features. Thus, a defined feature of "first", "second", may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk, an optical disk, or the like.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (12)
1. A non-contact type fingerprint and palm print acquisition device is characterized by comprising: the device comprises a first shooting mechanism, a second shooting mechanism and a shell; the first shooting mechanism and the second shooting mechanism are arranged on a supporting structure in the shell, a finger placing area and a palm placing area are arranged outside the shell, the finger placing area corresponds to the shooting position of the first shooting mechanism, and the palm placing area corresponds to the shooting position of the second shooting mechanism;
the first shooting mechanism comprises a rotating device, a linear array camera installed on the rotating device and a first lighting light column with a preset angle; the rotating device drives the linear array camera and the first lighting light column to rotate around the finger placement area, the linear array camera is triggered to scan and shoot a finger fingerprint surface in the rotating process, and the first lighting light column is aligned to the shot finger fingerprint surface in the rotating process;
the second shooting mechanism comprises a mobile device, an area array camera installed on the mobile device and a second lighting light column with a preset angle; the mobile device drives the area-array camera and the second lighting light column to move in parallel with the palm placing area and incline towards the palm placing area at the two side stop positions, the area-array camera is triggered to shoot the palm grain surface when the area-array camera moves to the palm center position and the two side stop positions, and the second lighting light column is aligned with the shot palm grain surface.
2. The non-contact fingerprint and palm print collecting device according to claim 1, wherein the rotating device comprises a first mounting platform, a first stepping motor, a first synchronizing wheel, a first synchronizing belt, a first encoding pulse trigger;
the output shaft of the first stepping motor is provided with the first synchronizing wheel and the first coded pulse trigger, and the first synchronizing belt is connected with the first mounting platform and the first synchronizing wheel; the first coding pulse trigger sends a first pulse trigger signal according to the rotation of the first stepping motor and is used for triggering the linear array camera to carry out scanning shooting; the first stepping motor drives the first synchronous wheel to rotate, the first synchronous wheel drives the first synchronous belt to transmit, the first synchronous belt drives the first mounting platform to rotate, and the first mounting platform is used for mounting the linear array camera and the first lighting light column.
3. The non-contact type fingerprint and palm print acquisition device according to claim 1, wherein a preset angle is preset between the plane of the lens of the line camera and the axis direction of the finger, and one side of the line camera close to the fingertip inclines towards the fingertip.
4. The non-contact fingerprint and palm print acquisition device according to claim 2 or 3, wherein an automatic pop-up positioning mechanism is arranged in a finger placement area on the housing, the automatic pop-up positioning mechanism comprises a finger placement support capable of popping up and automatically resetting and an arc-shaped soft rubber finger clamping device, the arc-shaped soft rubber finger clamping device is used for clamping a finger on the finger placement support, a movable template corresponding to the position of the fingertip is arranged on the finger placement support, and the movable template is automatically pulled away when the finger placement support is automatically reset.
5. The non-contact fingerprint and palm print acquisition device according to claim 4, further comprising: the finger placing support comprises annular finger sleeves of different sizes, the annular finger sleeves are used for being sleeved on finger joints, the outer rings of the annular finger sleeves of different sizes are matched with the automatic popping positioning mechanism, the inner rings of the annular finger sleeves of different sizes are respectively matched with finger sizes of different thicknesses, the positions, sleeved on fingers, of the annular finger sleeves correspond to the positions of the circular arc-shaped soft rubber finger clamping devices, and the annular finger sleeves correspond to the positions of the shell when the finger placing support resets.
6. The non-contact type fingerprint and palm print collecting device according to claim 5, further comprising a suction cup mounting bracket in the housing, wherein a suction cup device is mounted on the suction cup mounting bracket, the suction cup device corresponds to the finger back position of the finger, and the suction cup device fixes the finger back through the suction force generated by the negative pressure.
7. The non-contact fingerprint and palm print collecting device according to claim 1, wherein the moving device comprises a second mounting platform, a second stepping motor, a second synchronous wheel, a second synchronous belt, a second coding pulse trigger;
the output shaft of the second stepping motor is provided with the second synchronous wheel and the second coding pulse trigger, and the second synchronous belt is connected with the second mounting platform and the second synchronous wheel; the second coding pulse trigger sends a second pulse trigger signal according to the rotation of the second stepping motor and is used for triggering the area-array camera to shoot; the second step motor drives the second synchronizing wheel rotates, the second synchronizing wheel drives the second synchronous belt transmission, the second synchronous belt drives the second mounting platform moves and stops moving at two side stop positions, and the second mounting platform is used for mounting the area array camera and the second lighting light beam.
8. The device of claim 7, wherein the moving device further comprises a tilt control device for controlling the second mounting platform to tilt to a preset tilt angle.
9. The non-contact type fingerprint and palm print collecting device according to claim 8, wherein the palm placing area on the shell is a transparent supporting plane, and the transparent supporting plane is parallel to the shooting plane of the area array camera on the second mounting platform;
the palm placing area is provided with photosensitive tubes arranged according to a preset interval, and the photosensitive tubes are used for determining the size and the position of the palm according to the number of the photosensitive tubes shielded by the palm.
10. The non-contact fingerprint and palm print collecting device according to claim 9, wherein the two-side stop position of the second mounting platform is determined according to palm size and position and a preset inclination angle of the second mounting platform.
11. The non-contact type fingerprint and palm print collecting device according to any one of claims 7 to 9, wherein a palm limiting device is arranged outside the palm placing area of the shell, and the palm limiting device comprises four limiting rods corresponding to the root parts of the finger slits and used for guiding the palm to be placed according to a preset position.
12. The device according to claim 11, further comprising an air bag for automatically descending and pressing on the back of the hand after putting the palm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022669983.1U CN213276693U (en) | 2020-11-18 | 2020-11-18 | Non-contact finger and palm print acquisition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022669983.1U CN213276693U (en) | 2020-11-18 | 2020-11-18 | Non-contact finger and palm print acquisition device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213276693U true CN213276693U (en) | 2021-05-25 |
Family
ID=75953278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022669983.1U Active CN213276693U (en) | 2020-11-18 | 2020-11-18 | Non-contact finger and palm print acquisition device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213276693U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114187616A (en) * | 2021-10-20 | 2022-03-15 | 新绎健康科技有限公司 | Novel energy detection equipment based on GDV technology |
| CN117275051A (en) * | 2023-11-22 | 2023-12-22 | 浙江威星电子系统软件股份有限公司 | Palm print dynamic intelligent monitoring device |
-
2020
- 2020-11-18 CN CN202022669983.1U patent/CN213276693U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114187616A (en) * | 2021-10-20 | 2022-03-15 | 新绎健康科技有限公司 | Novel energy detection equipment based on GDV technology |
| CN117275051A (en) * | 2023-11-22 | 2023-12-22 | 浙江威星电子系统软件股份有限公司 | Palm print dynamic intelligent monitoring device |
| CN117275051B (en) * | 2023-11-22 | 2024-02-02 | 浙江威星电子系统软件股份有限公司 | Palm print dynamic intelligent monitoring device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN213276693U (en) | Non-contact finger and palm print acquisition device | |
| EP2740405B1 (en) | X-ray imaging apparatus and method for controlling the same | |
| CN112232304A (en) | Non-contact finger-palm print acquisition device and method | |
| JP6338526B2 (en) | Method and apparatus for identifying eye topography | |
| US20050084137A1 (en) | System and method for iris identification using stereoscopic face recognition | |
| US8121356B2 (en) | Long distance multimodal biometric system and method | |
| JP3810782B2 (en) | Personal recognition device | |
| US6606458B2 (en) | Automatic framing camera | |
| CN106821303B (en) | A kind of autonomous type Fundus photography imaging system and method | |
| CN108154126B (en) | Iris imaging system and method | |
| JP2002223381A (en) | Document camera | |
| JP2006255430A (en) | Individual identification device | |
| CN109753925A (en) | A kind of method and apparatus that iris feature extracts | |
| CN112317962A (en) | Marking system and method for invisible appliance production | |
| CN113515975B (en) | Face and iris image acquisition method and device, readable storage medium and equipment | |
| CN103546672A (en) | Image collecting system | |
| WO2000033569A1 (en) | Fast focus assessment system and method for imaging | |
| CN213276692U (en) | Non-contact fingerprint acquisition device of rotatory shooting | |
| JP2001257929A (en) | Object tracking device | |
| US20240050153A1 (en) | Depilatory device and depilation method | |
| CN112257675A (en) | Non-contact fingerprint acquisition device of rotatory shooting | |
| CN213279876U (en) | Focusing and zooming control system of integrated optical equipment | |
| JPH05297152A (en) | Object recognizing device | |
| CN109635716A (en) | Iris capturing equipment and its acquisition method | |
| CN218304882U (en) | Auxiliary diagnosis and treatment equipment for hair transplantation and head cover thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |