CN116962891A - Iris image acquisition infrared lamp light supplementing method, device, medium and equipment - Google Patents
Iris image acquisition infrared lamp light supplementing method, device, medium and equipment Download PDFInfo
- Publication number
- CN116962891A CN116962891A CN202310850714.0A CN202310850714A CN116962891A CN 116962891 A CN116962891 A CN 116962891A CN 202310850714 A CN202310850714 A CN 202310850714A CN 116962891 A CN116962891 A CN 116962891A
- Authority
- CN
- China
- Prior art keywords
- infrared lamp
- infrared
- sub
- region
- average gray
- 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 37
- 230000001502 supplementing effect Effects 0.000 title claims abstract description 33
- 230000001105 regulatory effect Effects 0.000 claims abstract description 16
- 239000013589 supplement Substances 0.000 claims abstract description 16
- 230000001276 controlling effect Effects 0.000 claims abstract description 9
- 230000011664 signaling Effects 0.000 claims abstract description 6
- 238000012545 processing Methods 0.000 claims description 43
- 230000008569 process Effects 0.000 claims description 9
- 230000002708 enhancing effect Effects 0.000 claims description 5
- 238000004891 communication Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 230000006870 function Effects 0.000 description 8
- 238000004364 calculation method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000004590 computer program Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000013473 artificial intelligence Methods 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000019612 pigmentation Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/74—Circuitry for compensating brightness variation in the scene by influencing the scene brightness using illuminating means
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/20—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from infrared radiation only
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/695—Control of camera direction for changing a field of view, e.g. pan, tilt or based on tracking of objects
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Image Input (AREA)
Abstract
An infrared lamp light supplementing method, device, medium and equipment for iris image acquisition relate to the technical field of biological feature recognition. The method comprises the following steps: acquiring a distance parameter between a target user and the infrared camera, and determining a first angle required to be rotated by the infrared camera and a second angle required to be rotated by the infrared lamp panel according to the distance parameter; after the infrared camera is controlled to rotate to a first angle, an iris image of a target user is acquired through the infrared camera; determining an infrared lamp to be adjusted in the infrared lamp panel according to the iris image; generating a control signal according to the infrared lamp to be regulated; and outputting a driving signal according to the control signal, and controlling the infrared lamp panel to supplement light to the infrared camera at a second angle according to the driving signal. By implementing the technical scheme provided by the application, the definition of iris image acquisition can be improved, and the efficiency of iris image recognition can be further improved.
Description
Technical Field
The application relates to the technical field of information processing, in particular to an infrared lamp light supplementing method, device, medium and equipment for iris image acquisition.
Background
Under the irradiation of infrared light with a certain wavelength, the iris generally presents a radial structure from inside to outside, and the fine features are called as features of the iris, have uniqueness and have important application value in the field of identity recognition. Aiming at the characteristics of the iris, the iris recognition technology adopts a special optical image acquisition instrument to acquire iris images of human eyes, and then the acquired iris images are stored, processed and compared through a digital image processing technology, a mode recognition technology and an artificial intelligence technology, so that the authentication and recognition of personnel identity are realized.
When the existing iris recognition device acquires images, the acquired images are uneven in brightness and obvious in gray scale difference due to various reasons, so that the iris recognition is difficult or the iris recognition is mistakenly performed. In order to improve the accuracy of iris recognition, satisfying the experience and satisfaction of society to identity recognition, and improving the uniformity of the gray scale of the iris, the improvement of the light supplementing mode of the infrared lamp is important. However, the infrared light supplementing mode in the prior art is single, and can only move up and down or left and right, and a fixed divergence angle and illumination intensity are set, or the left eye and the right eye are supplemented with light independently, so that the acquired iris image is unclear, and the iris recognition efficiency is reduced.
Disclosure of Invention
The application provides an infrared lamp light supplementing method, device, medium and equipment for iris image acquisition, which can improve the uniformity of iris gray scale, thereby improving the definition of iris image acquisition and further improving the efficiency of iris image identification.
In a first aspect, the present application provides an infrared lamp light supplementing device for iris image acquisition, the device comprising: ranging module, infrared camera, image processing module, control circuit module, drive circuit module and infrared lamp plate, the infrared lamp plate includes a plurality of infrared lamps, every infrared lamp individual control, wherein:
the distance measuring module is used for acquiring a distance parameter between a target user and the infrared camera and determining a first angle required to be rotated by the infrared camera and a second angle required to be rotated by the infrared lamp panel according to the distance parameter;
the infrared camera is used for collecting iris images of the target user after rotating to the first angle;
the image processing module is used for processing the iris image and determining an infrared lamp to be adjusted in the infrared lamp panel;
the control circuit module is used for generating a control signal according to the infrared lamp to be regulated;
The driving circuit module is used for outputting a driving signal according to the control signal and controlling the infrared lamp panel to supplement light to the infrared camera at the second angle according to the driving signal.
Through adopting above-mentioned technical scheme, can acquire the distance parameter of target user and infrared camera according to iris range finding module to calculate the angle that camera and infrared board need be adjusted according to distance parameter, thereby make the infrared camera gather iris image more accurately at corresponding angle, carry out the analysis through image processing module to iris image, can confirm the infrared lamp that waits to adjust in the infrared lamp board, rethread control circuit module generates control signal, finally output drive signal through drive circuit module, carry out the light filling to the infrared camera at the second angle according to drive signal drive infrared lamp board, thereby promote the definition to iris image acquisition, further can promote the efficiency to iris image discernment.
Optionally, the distance measurement module is configured to obtain a distance parameter between a target user and the infrared camera, and determine, according to the distance parameter, a first angle required to rotate by the infrared camera and a second angle required to rotate by the infrared lamp panel, where the distance measurement module includes: the distance measuring module is specifically used for acquiring a first distance between a body position body of a target user and the infrared camera and a second distance between an eye position of the target user and the infrared camera; calculating a first angle required to rotate by the infrared camera according to the first distance and the second distance; acquiring a first center-to-center distance between the geometric center of the infrared lamp panel and the geometric center of the infrared camera, and calculating a second center-to-center distance according to the first distance and the first angle; and calculating a second angle of the infrared lamp panel required to rotate according to the first center distance, the second center distance and the first distance.
Through adopting above-mentioned technical scheme, can calculate the required rotatory first angle of infrared camera and the required rotatory second angle of infrared lamp plate according to the distance between user and the camera to can make the infrared camera rotate to the first angle after gathering more standard iris image, also can make the infrared board more accurately for infrared camera light filling after rotating to the second angle simultaneously.
Optionally, the image processing module is configured to process the iris image, determine an infrared lamp to be adjusted in the infrared lamp panel, and include: the image processing module is specifically used for determining an interesting region of the iris image, denoising the image of the interesting region and obtaining a denoised image of the interesting region; and calculating the average gray value of the image of the region of interest after denoising, and determining the infrared lamp to be regulated in the infrared lamp panel based on the average gray value.
Through adopting above-mentioned technical scheme, through confirming the region of interest of iris image and carrying out denoising processing, can improve the quality and the definition of iris image, adjust infrared lamp through calculating average gray value simultaneously for infrared lamp plate carries out the light filling for infrared camera, can promote the definition to iris image acquisition, further can promote the efficiency to iris image discernment.
Optionally, the image processing module is configured to determine, based on the average gray value, an infrared lamp to be adjusted in the infrared lamp panel, and includes: the image processing module is specifically used for determining a definition score of the iris image according to the average gray value; judging whether the definition score is smaller than a definition score threshold value or not; if the definition score is smaller than a definition score threshold, dividing the image of the denoised region of interest into a plurality of subareas according to a preset dividing rule, respectively calculating sub-average gray values of the subareas, and determining infrared lamps to be regulated in the infrared lamp panel based on the sub-average gray values of the subareas, wherein each subarea corresponds to each infrared lamp in the infrared lamp panel; and if the definition score is not smaller than the definition score threshold, determining that no infrared lamp to be adjusted exists in the infrared lamp panel.
Through adopting above-mentioned technical scheme, confirm the definition grade of iris image through average gray value to compare definition grade and definition grade threshold value, if definition grade is less than definition grade threshold value, then probably this iris image is not clear enough to lead to unable iris image that gathers up to standard, through the mode of dividing subregion, and confirm the infrared lamp of waiting to adjust in the infrared lamp panel according to the sub-average gray value of each subregion, can adjust the infrared lamp to the definition condition of each subregion more accurately, further promote the definition to iris image acquisition.
Optionally, the image processing module is configured to determine an infrared lamp to be adjusted in the infrared lamp panel based on the sub-average gray value of each sub-region, and includes: the image processing module is specifically configured to compare each sub-average gray value with a sub-average gray threshold value of each corresponding sub-region; if a first region with the sub-average gray value smaller than the sub-average gray threshold value of each corresponding sub-region exists in each sub-region, determining that the infrared lamp corresponding to the first region is a first infrared lamp to be adjusted, wherein the infrared lamp light intensity of the first infrared lamp to be adjusted needs to be enhanced to a first target light intensity corresponding to the first region, and the first target light intensity is the light intensity corresponding to the sub-average gray threshold value corresponding to the first region.
By adopting the technical scheme, each sub-average gray value is compared with the sub-average gray threshold value of each corresponding sub-region, if a first region with the sub-average gray value smaller than the sub-average gray threshold value of each corresponding sub-region exists in each sub-region, the first region is indicated to possibly cause unclear images due to lower brightness, the light intensity of the infrared lamp corresponding to the region is enhanced to the light intensity corresponding to the sub-average gray threshold value, the infrared lamp can be adjusted more accurately according to the definition condition of each sub-region, and the definition of iris image acquisition is further improved.
Optionally, the image processing module is further configured to determine that the infrared lamp corresponding to the second area is a second infrared lamp to be adjusted if a second area with a sub-average gray level greater than a sub-average gray level threshold of the corresponding sub-area exists in each sub-area, where the light intensity of the second infrared lamp to be adjusted needs to be reduced to a second target light intensity corresponding to the second area, and the second target light intensity is a light intensity corresponding to the sub-average gray level threshold corresponding to the second area.
By adopting the technical scheme, if the second area with the sub-average gray value larger than the sub-average gray threshold value of the corresponding sub-area exists in each sub-area, the fact that the image is too exposed due to the fact that the brightness of the second area is too high is indicated, so that the light intensity of the second infrared lamp to be adjusted is reduced to the light intensity corresponding to the sub-average gray threshold value, the infrared lamp can be adjusted more accurately according to the definition condition of each sub-area, and the definition of iris image acquisition is further improved.
Optionally, the driving circuit module is configured to output a driving signal according to the control signal, drive the infrared lamp panel to perform light filling on the infrared camera at the second angle according to the driving signal, and includes: the driving circuit module is specifically configured to output a driving signal according to the control signal, adjust a PWM duty cycle according to the driving signal, and adjust light intensity of the infrared lamp panel according to the PWM duty cycle, so that the infrared lamp panel supplements light to the infrared camera at the second angle.
Through adopting above-mentioned technical scheme, can control the luminance of infrared lamp according to the regulation of PWM duty cycle to avoid influencing iris recognition's accuracy because of the infrared lamp is too bright or too dark, carry out light filling to infrared camera at the second angle through controlling the infrared lamp plate, can light filling shade and dark portion in the iris image, make the iris image brighter and clear more, further can promote the efficiency to iris image recognition.
In a second aspect of the present application, there is provided an infrared lamp light supplementing method for iris image acquisition, applied to an infrared lamp light supplementing device for iris image acquisition, the method comprising:
acquiring a distance parameter between a target user and an infrared camera, and determining a first angle required to be rotated by the infrared camera and a second angle required to be rotated by an infrared lamp panel according to the distance parameter;
after the infrared camera is controlled to rotate to the first angle, acquiring iris images of the target user through the infrared camera;
determining an infrared lamp to be adjusted in the infrared lamp panel according to the iris image;
generating a control signal according to the infrared lamp to be regulated;
and outputting a driving signal according to the control signal, and controlling the infrared lamp panel to supplement light to the infrared camera at the second angle according to the driving signal.
Through adopting above-mentioned technical scheme, can acquire the distance parameter of target user and infrared camera to calculate the angle that camera and infrared light board need be adjusted according to distance parameter, thereby make the infrared camera gather iris image more accurately at corresponding angle, through carrying out analysis to iris image, can confirm the infrared lamp of waiting to adjust in the infrared light board, drive the infrared light board carries out the light filling to the infrared camera at the second angle, can promote the definition of gathering iris image, further can promote the efficiency of discernment to iris image.
Optionally, the determining the infrared lamp to be adjusted in the infrared lamp panel according to the iris image includes: determining an interesting region of the iris image, and denoising the image of the interesting region to obtain a denoised image of the interesting region; calculating the average gray value of the image of the region of interest after denoising; determining a definition score of the iris image according to the average gray value; judging whether the definition score is smaller than the definition score threshold; if the definition score is smaller than a definition score threshold, dividing the image of the denoised region of interest into a plurality of subareas according to a preset dividing rule, respectively calculating sub-average gray values of the subareas, and comparing the sub-average gray values with the sub-average gray threshold of the corresponding subareas; if a first region with the sub-average gray value smaller than the sub-average gray threshold value of each corresponding sub-region exists in each sub-region, determining that the infrared lamp corresponding to the first region is a first infrared lamp to be adjusted, wherein the first infrared lamp to be adjusted is obtained by enhancing the light intensity of the infrared lamp corresponding to the first region to the light intensity corresponding to the sub-average gray threshold value; and if the definition score is not smaller than the definition score threshold, determining that no infrared lamp to be adjusted exists in the infrared lamp panel.
By adopting the technical scheme, the influence of noise can be reduced by determining the region of interest of the iris image and denoising the region, the quality of the iris image is improved, the average gray value of the denoised region of interest is calculated, the definition degree of the iris image can be estimated, if the definition score is lower than the definition score threshold, the image of the denoised region of interest is divided into a plurality of subareas, the sub-average gray of each subarea is compared with the corresponding sub-average gray threshold, so that the brightness of the corresponding infrared lamp is regulated, the infrared lamp can be regulated according to the definition condition of each subarea more accurately, and the definition of the iris image acquisition is further improved.
In a third aspect the application provides a computer storage medium storing a plurality of instructions adapted to be loaded by a processor and to perform the above-described method steps.
In summary, one or more technical solutions provided in the embodiments of the present application at least have the following technical effects or advantages:
1. according to the application, the distance parameter between a target user and the infrared camera can be obtained, and the angles of the camera and the infrared light plate to be adjusted are calculated according to the distance parameter, so that the iris image is acquired more accurately by the infrared camera at the corresponding angle, the infrared light to be adjusted in the infrared light plate can be determined by analyzing the iris image, the infrared light plate is driven to supplement light to the infrared camera at the second angle, the definition of iris image acquisition can be improved, and the iris image identification efficiency can be further improved;
2. According to the application, the brightness of the infrared lamp can be controlled according to the adjustment of the PWM duty ratio, so that the influence on the accuracy of iris recognition due to the over-brightness or over-darkness of the infrared lamp is avoided, the infrared camera is supplemented with light at a second angle by controlling the infrared lamp panel, the shadow and the darkness in the iris image can be supplemented with light, the iris image is brighter and clearer, and the iris image recognition efficiency can be further improved;
3. according to the application, the sub-average gray level of each sub-region is compared with the corresponding sub-average gray level threshold value, so that the brightness of the corresponding infrared lamp is adjusted, the infrared lamp can be adjusted more accurately according to the definition condition of each sub-region, and the definition of iris image acquisition is further improved.
Drawings
Fig. 1 is a schematic block diagram of an infrared light supplementing device for iris image acquisition according to an embodiment of the present application;
fig. 2 is a schematic diagram of distance parameters between an infrared camera and a target user according to an embodiment of the present application;
FIG. 3 is a diagram showing an iris image comparison example before and after light filling according to an embodiment of the present application;
fig. 4 is a schematic flow chart of an infrared lamp light supplementing method for iris image acquisition according to an embodiment of the application;
Fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Reference numerals illustrate: 10. a ranging module; 20. an infrared camera; 30. an image processing module; 40. a control circuit module; 50. a driving circuit module; 60. an infrared lamp panel; 500. an electronic device; 501. a processor; 502. a communication bus; 503. a user interface; 504. a network interface; 505. a memory.
Detailed Description
In order that those skilled in the art will better understand the technical solutions in the present specification, the technical solutions in the embodiments of the present specification will be clearly and completely described below with reference to the drawings in the embodiments of the present specification, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments.
In describing embodiments of the present application, words such as "for example" or "for example" are used to mean serving as examples, illustrations, or descriptions. Any embodiment or design described herein as "such as" or "for example" in embodiments of the application should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "or" for example "is intended to present related concepts in a concrete fashion.
In the description of embodiments of the application, the term "plurality" means two or more. For example, a plurality of systems means two or more systems, and a plurality of screen terminals means two or more screen terminals. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating an indicated technical feature. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.
In order to facilitate understanding of the method and apparatus provided by the embodiments of the present application, a background of the embodiments of the present application is described before the embodiments of the present application are described.
The iris is a tissue of human eyes and has unique texture characteristics. These features are formed by blood vessels and pigmentation within the iris, while their shape and distribution are random and vary from person to person, so that the iris is considered as a reliable method of identification as a biological feature of the human body, and has important application value in the field of identification. The iris recognition technology can be used for acquiring iris images in human eyes, extracting characteristic information of the iris and converting the characteristic information into digital codes, so that identity verification and identity recognition are realized.
The iris texture in the iris image is formed by reflection, and the iris itself is transparent and does not have the capability of reflection, so that the reflection effect of the iris needs to be enhanced by light supplementing so as to better extract the iris texture information. But the infrared light filling mode of prior art is single, and the light filling scope is limited, only can go on in upper and lower or left and right directions, and the light filling intensity is fixed with the angle of diverging, can't satisfy the demand of iris image acquisition under the different environment, leads to the acquisition to iris image unclear to lead to the efficiency of gathering the iris image up to standard lower.
In view of the foregoing background description, those skilled in the art will appreciate that the problems associated with the prior art are solved and a complete description of the embodiments of the present application is provided below, with reference to the accompanying drawings in which embodiments of the present application are shown, wherein it is apparent that the embodiments described are only some, but not all, embodiments of the present application.
In order to solve the problems, the embodiment of the application provides an infrared lamp light supplementing device for iris image acquisition, and the infrared lamp light supplementing device based on the iris image acquisition is used for supplementing light when the iris image is acquired, so that the definition of iris image acquisition can be improved, and the efficiency of iris image identification can be further improved.
Referring to fig. 1, a schematic block diagram of an infrared light compensating device for iris image acquisition according to an embodiment of the application is shown.
The infrared lamp light filling device that iris image gathered includes range finding module 10, infrared camera 20, image processing module 30, control circuit module 40, drive circuit module 50 and infrared lamp plate 60, wherein:
the distance measuring module 10 is configured to obtain a distance parameter between a target user and the infrared camera 20, and determine a first angle required to rotate the infrared camera 20 and a second angle required to rotate the infrared lamp panel 60 according to the distance parameter.
Specifically, a mid-infrared range finder is provided in the ranging module 10, and the infrared range finder is an instrument for measuring the distance of an object by using infrared rays. The infrared distance meter receives the reflected signal and calculates the distance between the object and the infrared distance meter after the infrared rays irradiate the target object and are reflected. In the embodiment of the present application, the method is mainly used for measuring the distance between the body position of the target user and the infrared camera 20, and the distance between the eye position of the target user and the infrared camera 20. The target user can be understood as a person who is to recognize the iris image, and the target user is positioned in front of the infrared lamp light supplementing device for iris image acquisition.
Fig. 2 is a schematic diagram of distance parameters between an infrared camera and a target user according to an embodiment of the present application. Wherein the vertical distance between the body position of the target user and the infrared camera 20 is L1, and the line distance between the eye position of the target user and the infrared camera 20 is L2. The position of the camera and the position of the infrared plate are fixed, so that the distance between the infrared camera 20 and the infrared lamp panel 60 is also fixed, and a first center-to-center distance H1 between the geometric center of the infrared lamp panel 60 and the geometric center of the infrared camera 20 is obtained. The first angle required to rotate the infrared camera 20 can be calculated according to the first distance L1 and the second distance L2, and the specific calculation formula is as follows:. Wherein the rotation range of the first angle of rotation of the infrared camera 20 can be set as follows. And then, calculating a second center-to-center distance H2 based on the first distance L1 and the first angle, wherein a specific calculation formula is as follows:. According to the first center-to-center distance, the second center-to-center distance and the first distance, a second angle of the infrared lamp panel 60 required to rotate is calculated, and the specific calculation method is as follows:。
it should be noted that, the photographing effect is best when the line connecting the center of the infrared camera 20 and the center of the human eye is perpendicular to the plane in which the infrared camera 20 is located, and the light supplementing capability is best when the line connecting the center of the infrared lamp panel 60 and the center of the human eye is perpendicular to the plane in which the infrared lamp panel 60 is located. In the embodiment of the application, after the infrared camera 20 rotates to the first angle, the connecting line between the center of the infrared camera 20 and the center of the human eye is perpendicular to the plane where the infrared camera 20 is located, and after the infrared lamp panel 60 rotates to the second angle, the connecting line between the center of the infrared lamp panel 60 and the center of the human eye is perpendicular to the plane where the infrared lamp panel 60 is located.
The infrared camera 20 is mainly used for collecting iris images of a target user after rotating to a first angle.
Specifically, after the ranging module 10 obtains the first angle, the first angle is sent to the infrared camera, and after the infrared camera rotates to the position corresponding to the first angle, the focusing distance of the infrared camera 20 is automatically adjusted according to the eye position and the distance of the target user, so that the collected relatively standard iris image is ensured. The position corresponding to the first angle is that the connection line between the center of the infrared camera 20 and the center of the human eye is perpendicular to the plane where the infrared camera 20 is located, so that the shooting effect of the infrared camera 20 is further ensured.
Further, when the infrared camera 20 rotates to the first angle, the infrared lamp panel 60 also rotates to the position corresponding to the second angle, wherein the infrared lamp panel 60 is provided with an initial light supplementing mode, light parameters in the initial light supplementing mode are obtained through multiple training, and most light supplementing conditions can be met, so before the infrared camera 20 collects iris images of the target user, the infrared lamp panel 60 starts the initial light supplementing mode to supplement light for the infrared camera 20, at this time, the infrared camera 20 collects iris images of the target user as initial iris images, and the iris images may have local unclear conditions due to insufficient light supplementing, so that the iris images cannot reach the standard.
The image processing module 30 is mainly used for processing the iris image and determining the infrared lamp to be adjusted in the infrared lamp panel.
Specifically, the infrared camera 20 sends the collected iris image to the image processing module 30, and the image processing module 30 determines the region of interest of the iris image, which may be a region including only the iris portion, because the iris image includes a portion around the eye other than the iris region, so that the subsequent calculation amount can be reduced and the accuracy of the iris image can be improved. Due to the fact that in the iris image acquisition process, noise and interference may exist in the acquired iris image due to the influence of factors such as ambient light and camera performance, accuracy of iris recognition is reduced due to the factors, and therefore a region of interest of the iris image needs to be subjected to denoising processing to obtain an image of the denoised region of interest, and quality of the iris image is improved.
Further, an average gray value of the image of the region of interest after denoising is calculated, wherein the average gray value is a quantized description of the whole gray of the iris image. The specific calculation method for the average gray value of the iris image in the embodiment of the application comprises the following steps: and traversing pixels of the image of the denoised region of interest, accumulating and summing up the gray values of each pixel point, and calculating the total number n of the pixels of the image of the denoised region of interest, wherein the average gray value is avg_value=sum/n. The image processing module 30 further includes an iris quality scoring unit, where the quality scoring unit is mainly configured to score the definition of the iris image, a relationship table of average gray values and definition scores is stored in the quality scoring unit, and the corresponding definition score can be determined according to the calculated average gray values of the image of the denoised region of interest.
Further, whether the definition score is smaller than a definition score threshold is judged, and the definition score threshold can be set for a person aiming at the definition of the iris image reaching standards. If the definition score is not less than the definition score threshold, indicating that the definition of the iris image is up to standard, determining that there is no infrared lamp to be adjusted in the infrared lamp panel 60, that is, not adjusting the infrared lamp in the infrared lamp panel 60 again. If the definition score is smaller than the definition score threshold, the definition of the iris image is not up to standard, the image of the region of interest after denoising is divided into a plurality of subareas according to a preset dividing rule, and in the embodiment of the application, the image of the region of interest can be divided into a row a, b column subareas. The preset dividing rule is determined according to the number and distribution of the infrared lamps in the infrared lamp panel, so as to ensure that the subareas of the image of the region of interest after denoising are in one-to-one correspondence with the infrared lamps of the infrared lamp panel 60, for example, 3*3 infrared lamps are arranged in the infrared lamp panel 60, and the image of the region of interest after denoising is divided into 9 corresponding subareas of 3*3.
And further, respectively calculating the sub-average gray values of all the subareas according to the average gray value calculation method, comparing each sub-average gray value with the sub-average gray threshold value of each corresponding subarea, if a first area with the sub-average gray value smaller than the sub-average gray threshold value of each corresponding subarea exists in each subarea, indicating that the image definition corresponding to the first area does not reach the standard, taking the infrared lamp corresponding to the first area as a first infrared lamp to be regulated, and enhancing the infrared lamp light intensity of the first infrared lamp to be regulated to the first target light intensity corresponding to the first area, wherein the first target light intensity is the light intensity corresponding to the sub-average gray threshold value corresponding to the first area. The brightness of the infrared lamp can be adjusted more accurately according to the definition condition of each subarea in the iris image, and the definition of iris image acquisition is further improved.
On the basis of the above embodiment, as an optional embodiment, the image processing module 30 is further configured to, if there is a second area in each sub-area with a sub-average gray level greater than the sub-average gray level threshold of the corresponding sub-area, indicate that the image corresponding to the first area is exposed due to the excessive light, determine that the infrared lamp corresponding to the second area is a second infrared lamp to be adjusted, where the infrared lamp light intensity of the second infrared lamp to be adjusted needs to be reduced to a second target light intensity corresponding to the second area, where the second target light intensity is the light intensity corresponding to the sub-average gray level threshold corresponding to the second area. The brightness of the infrared lamp can be adjusted more accurately according to the definition condition of the sub-region in the iris image, and the definition of the iris image acquisition is further improved.
It should be noted that, the above-mentioned infrared light panel 60 is different from the installation mode in the prior art, and the installation mode in the prior art is that the infrared light panel 60 and the infrared camera 20 are located on the same plane and rotate along with the rotation of the camera, if the problem of uneven lighting is encountered, the light cannot be improved by the independent action. In the embodiment of the application, the infrared lamp panel 60 rotates synchronously with the infrared camera 20 only in the plane of the x-axis and the y-axis in the three-dimensional plane, namely in the x-axis, the y-axis and the z-axis of the space rectangular coordinate system, and can rotate freely in the z-axis direction. That is, for the target users with different distances, different heights and different angles, when the infrared camera 60 collects iris images of the target users, the light supplementing condition of the infrared lamp panel 60 can be correspondingly changed, the problems of uneven light, insufficient light supplementing capability, light reflection and the like are avoided, the definition of iris image collection is improved, and the efficiency of iris image identification is further improved.
The infrared lamp panel 60 is formed by combining a row a and b column b of infrared lamps, and 3*3 infrared lamps are used for illustration in the embodiment of the present application, and each sub-area corresponds to each infrared lamp in the infrared lamp panel 60. The connecting line between the center of each infrared lamp and the center of the human eye is perpendicular to the infrared lamp panel 60, namely, parallel infrared rays emitted by the infrared lamp panel 60 are perpendicular to the human eye, nine sub-areas of the image of the region of interest after denoising can be in one-to-one correspondence with nine infrared lamps of the infrared lamp panel 60, and the infrared lamps of each sub-area can be controlled independently.
The control circuit module 40 is mainly used for generating control signals according to the infrared lamps to be adjusted in the infrared lamp panel.
Specifically, the control signal refers to an electrical signal or a signal combination for controlling the operation of a certain system or device, and in the embodiment of the present application, the control signal is mainly used to control the brightness of the infrared lamp light. The control circuit module 40 receives information of the infrared lamp to be adjusted, and the infrared lamp to be adjusted may include a first infrared lamp to be adjusted and/or a second infrared lamp to be adjusted, wherein a brightness adjustment requirement of the first infrared lamp to be adjusted is: enhancing the light intensity of the first infrared lamp to be regulated to the light intensity corresponding to the sub-average gray threshold corresponding to the first area, wherein the brightness regulation requirement of the second infrared lamp to be regulated is as follows: and reducing the light intensity of the second infrared lamp to be adjusted to the light intensity corresponding to the sub-average gray threshold corresponding to the second area. And converting the brightness adjustment requirement of the first infrared lamp to be adjusted and/or the brightness adjustment requirement of the second infrared lamp to be adjusted into a control signal for output, wherein the control signal comprises the identification of each infrared lamp and the corresponding brightness adjustment requirement.
The driving circuit module 50 is mainly configured to output a driving signal according to the control signal, and drive the infrared lamp panel to supplement light to the infrared camera at the second angle according to the driving signal.
Specifically, the driving circuit module 50 includes a plurality of groups of driving signals of a row and b column of infrared lamps, each external red lamp is independently controlled, the infrared lamps to be driven are determined according to the infrared lamp identifiers included in the control signals, and driving signals are generated, in this embodiment of the present application, the driving signals are pulse width modulation signals (PWM), and the duty ratio of the PWM signals is adjusted according to the brightness adjustment requirement to control the brightness and the switch of the corresponding infrared lamps in the infrared lamp panel 60, so as to realize that the infrared lamp panel 60 supplements light to the infrared camera 20 at the second angle corresponding position. The brightness adjustment requirement of each subarea in the iris image can be accurately met, the brightness of each infrared lamp can be independently controlled and adjusted, the light supplementing when the iris image is acquired by the infrared camera under different conditions is realized, the definition of iris image acquisition is improved, and the efficiency of iris image identification can be further improved.
For example, if the sharpness score of the iris image is smaller than the sharpness score threshold, which indicates that the sharpness of the iris image is not up to standard, the image of the region of interest after denoising is divided into nine sub-regions of 3*3, each region corresponds to an identifier, for example, it may be represented by 001-009, and if the sub-average gray values of the 001 region, the 002 region and the 009 region are smaller than the sub-average gray threshold of the corresponding sub-regions, the 001 region, the 002 region and the 009 region are all regarded as the first region, i.e. the sharpness of the image corresponding to the first region is not up to standard. Since the sub-areas are in one-to-one correspondence with the infrared lamps of the infrared lamp panel 60, the infrared lamp panel may also be provided with corresponding identification marks, which may be represented by LEDs 1-9, for example. Taking the infrared lamp corresponding to the first area as a first infrared lamp to be adjusted, wherein the first infrared lamp to be adjusted comprises an LED1, an LED2 and an LED9, and the brightness adjustment requirement of the first infrared lamp to be adjusted is as follows: the light intensity of the LED1, the LED2 and the LED9 is enhanced to the light intensity corresponding to the sub-average gray threshold corresponding to the first area, the brightness adjustment requirement of the first infrared lamp to be adjusted is converted into a control signal to be output, and then a driving signal is output based on the control signal, wherein the driving signal comprises: the infrared lamps of row 1 and column 1 are driven to adjust to the light intensity corresponding to the sub-average gray threshold value corresponding to the 001 region, the infrared lamps of row 1 and column 2 are driven to adjust to the light intensity corresponding to the sub-average gray threshold value corresponding to the 002 region, and the infrared lamps of row 3 and column 3 are driven to adjust to the light intensity corresponding to the sub-average gray threshold value corresponding to the 009 region. The uniformity of the gray level of the iris image can be improved, so that the definition of iris image acquisition is improved, and the efficiency of iris image recognition is further improved.
Fig. 3 is a diagram of an iris image comparison example before and after light filling according to an embodiment of the present application.
In the process that the driving circuit module 50 drives the infrared lamp panel to supplement light to the infrared camera at the second angle, the infrared camera can acquire iris images in real time and send the iris images to the image processing module 30 for processing and analysis, the average gray value of the iris images is calculated, the definition score is determined according to the average gray value by the iris quality scoring unit in the image processing module 30, and standard definition scores corresponding to the iris images reaching the standard are arranged in the quality scoring unit.
Further, in the process of light supplementing, the duty ratio of the PWM signal is adjusted according to the adjustment requirement of the first infrared lamp to be adjusted and/or the second infrared lamp to be adjusted, when the first infrared lamp to be adjusted needs to be increased to the first target light intensity, the duty ratio of the PWM signal can be correspondingly increased according to the first target light intensity, so that the infrared lamp panel 60 works in a higher brightness state; when the second infrared lamp to be adjusted needs to be reduced to the second target light intensity, the duty ratio of the PWM signal can be reduced according to the second target light intensity, so that the infrared lamp panel works in a low brightness state, and the adjustment of the light supplement of the infrared camera 20 by the infrared lamp panel 60 is stopped until the definition score of the iris image reaches the corresponding standard definition score.
As shown in fig. 3, the left is the initial iris image before light filling, and the right is the target iris image after light filling, which meets the standard of the standard iris image.
It should be noted that, the quality scoring unit in the image processing module 30 may be implemented to efficiently and rapidly evaluate the quality of the image and analyze whether the image meets the standard at the acquisition rate of 30 frames per second. And the control circuit module 40 and the driving circuit module 50 can almost simultaneously correspond to the upper-level instruction and adjust the light supplementing condition of the infrared lamp panel 60, so that the acquisition speed of the iris image is not influenced, meanwhile, the definition of the iris image acquisition can be improved, and the iris image recognition efficiency can be further improved.
In an embodiment, please refer to fig. 4, a schematic flow chart of an infrared light supplementing method for iris image acquisition is specifically provided, and the method can be implemented by a computer program, a single chip microcomputer or an infrared light supplementing device for iris image acquisition based on von neumann system. The computer program can be integrated in an application or can be run as a separate tool application, specifically, in the embodiment of the present application, the method can be applied to a terminal device for iris recognition, and the method includes steps 101 to 105, where the steps are as follows:
Step 101: and acquiring a distance parameter between a target user and the infrared camera, and determining a first angle required to be rotated by the infrared camera and a second angle required to be rotated by the infrared lamp panel according to the distance parameter.
Step 102: and after the infrared camera is controlled to rotate to a first angle, the iris image of the target user is acquired through the infrared camera.
Step 103: and determining the infrared lamp to be adjusted in the infrared lamp panel according to the iris image.
Step 104: and generating a control signal according to the infrared lamp to be regulated.
Step 105: and outputting a driving signal according to the control signal, and controlling the infrared lamp panel to supplement light to the infrared camera at a second angle according to the driving signal.
Specific implementation manner can be referred to the content described in the above device section, and will not be repeated here.
Based on the above embodiment, as an optional embodiment, the iris image is processed to determine the infrared lamp to be adjusted in the infrared lamp panel, and the method may further include steps 301 to 305:
step 301: determining an interesting region of the iris image, and denoising the image of the interesting region to obtain a denoised image of the interesting region; and calculating the average gray value of the image of the region of interest after denoising.
Step 302: and determining the definition score of the iris image according to the average gray value.
Step 303: and judging whether the definition score is smaller than a definition score threshold.
Step 304: if the definition score is smaller than the definition score threshold, dividing the denoised image of the region of interest into a plurality of subareas according to a preset dividing rule, respectively calculating sub-average gray values of the subareas, and comparing each sub-average gray value with the corresponding sub-average gray threshold of each subarea; if a first region with the sub-average gray level value smaller than the sub-average gray level threshold value of each corresponding sub-region exists in each sub-region, determining the infrared lamp corresponding to the first region as a first infrared lamp to be adjusted, wherein the first infrared lamp to be adjusted is used for enhancing the light intensity of the infrared lamp corresponding to the first region to the light intensity corresponding to the sub-average gray level threshold value.
Step 305: and if the definition score is not smaller than the definition score threshold, determining that no infrared lamp to be adjusted exists in the infrared lamp panel.
Specific implementation manner can be referred to the content described in the above device section, and will not be repeated here.
It should be noted that: in the device provided in the above embodiment, when implementing the functions thereof, only the division of the above functional modules is used as an example, in practical application, the above functional allocation may be implemented by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules, so as to implement all or part of the functions described above. In addition, the embodiments of the apparatus and the method provided in the foregoing embodiments belong to the same concept, and specific implementation processes of the embodiments of the apparatus are detailed in the embodiments of the apparatus, which are not described herein again.
The embodiment of the present application further provides a computer storage medium, where the computer storage medium may store a plurality of instructions, where the instructions are suitable for being loaded by a processor and executed by an infrared light supplementing method for iris image acquisition in the embodiment shown in fig. 4, and the specific execution process may refer to the specific description of the embodiment shown in fig. 4, which is not repeated herein.
Referring to fig. 5, the application also discloses an electronic device. Fig. 5 is a schematic structural diagram of an electronic device according to the disclosure. The electronic device 500 may include: at least one processor 501, at least one network interface 504, a user interface 503, a memory 505, at least one communication bus 502.
Wherein a communication bus 502 is used to enable connected communications between these components.
The user interface 503 may include a Display screen (Display) and a Camera (Camera), and the optional user interface 503 may further include a standard wired interface and a standard wireless interface.
The network interface 504 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface), among others.
Wherein the processor 501 may include one or more processing cores. The processor 501 connects various parts throughout the server using various interfaces and lines, performs various functions of the server and processes data by executing or executing instructions, programs, code sets, or instruction sets stored in the memory 505, and invoking data stored in the memory 505. Alternatively, the processor 501 may be implemented in hardware in at least one of digital signal processing (Digital Signal Processing, DSP), field programmable gate array (Field-Programmable Gate Array, FPGA), programmable logic array (Programmable Logic Array, PLA). The processor 501 may integrate one or a combination of several of a central processing unit (Central Processing Unit, CPU), an image processor (Graphics Processing Unit, GPU), and a modem, etc. The CPU mainly processes an operating system, a user interface, an application program and the like; the GPU is used for rendering and drawing the content required to be displayed by the display screen; the modem is used to handle wireless communications. It will be appreciated that the modem may not be integrated into the processor 501 and may be implemented by a single chip.
The Memory 505 may include a random access Memory (Random Access Memory, RAM) or a Read-Only Memory (Read-Only Memory). Optionally, the memory 505 comprises a non-transitory computer readable medium (non-transitory computer-readable storage medium). Memory 505 may be used to store instructions, programs, code sets, or instruction sets. The memory 505 may include a stored program area and a stored data area, wherein the stored program area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playing function, an image playing function, etc.), instructions for implementing the above-described various method embodiments, etc.; the storage data area may store data or the like involved in the above respective method embodiments. The memory 505 may also optionally be at least one storage device located remotely from the processor 1001. Referring to fig. 5, an operating system, a network communication module, a user interface module, and an application program for infrared lamp light supplement for iris image collection may be included in the memory 505 as a computer storage medium.
In the electronic device 500 shown in fig. 5, the user interface 503 is mainly used for providing an input interface for a user, and acquiring data input by the user; and the processor 501 may be configured to invoke an application in the memory 505 that stores an infrared lamp light supplement for iris image acquisition, which when executed by the one or more processors 501, causes the electronic device 500 to perform the method as described in one or more of the embodiments above. It should be noted that, for simplicity of description, the foregoing method embodiments are all described as a series of acts, but it should be understood by those skilled in the art that the present application is not limited by the order of acts described, as some steps may be performed in other orders or concurrently in accordance with the present application. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all of the preferred embodiments, and that the acts and modules referred to are not necessarily required for the present application.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
In the several embodiments provided by the present application, it should be understood that the disclosed apparatus may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, such as a division of units, merely a division of logic functions, and there may be additional divisions in actual implementation, such as multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some service interface, device or unit indirect coupling or communication connection, electrical or otherwise.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable memory. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in whole or in part in the form of a software product stored in a memory, comprising several instructions for causing a computer device (which may be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method of the various embodiments of the present application. And the aforementioned memory includes: various media capable of storing program codes, such as a U disk, a mobile hard disk, a magnetic disk or an optical disk.
The foregoing is merely exemplary embodiments of the present disclosure and is not intended to limit the scope of the present disclosure. That is, equivalent changes and modifications are contemplated by the teachings of this disclosure, which fall within the scope of the present disclosure. Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure.
This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a scope and spirit of the disclosure being indicated by the claims.
Claims (10)
1. An infrared lamp light filling device of iris image collection, characterized in that, the device includes: ranging module, infrared camera, image processing module, control circuit module, drive circuit module and infrared lamp plate, the infrared lamp plate includes a plurality of infrared lamps, every infrared lamp individual control, wherein:
the distance measuring module is used for acquiring a distance parameter between a target user and the infrared camera and determining a first angle required to be rotated by the infrared camera and a second angle required to be rotated by the infrared lamp panel according to the distance parameter;
the infrared camera is used for collecting iris images of the target user after rotating to the first angle;
the image processing module is used for processing the iris image and determining an infrared lamp to be adjusted in the infrared lamp panel;
The control circuit module is used for generating a control signal according to the infrared lamp to be regulated;
the driving circuit module is used for outputting a driving signal according to the control signal and controlling the infrared lamp panel to supplement light to the infrared camera at the second angle according to the driving signal.
2. The infrared light beam filling device for iris image acquisition according to claim 1, wherein the distance measuring module is configured to obtain a distance parameter between a target user and the infrared camera, and determine a first angle required to rotate the infrared camera and a second angle required to rotate an infrared light panel according to the distance parameter, and the infrared light beam filling device comprises:
the distance measuring module is specifically configured to obtain a first distance between the body position of the target user and the infrared camera, and a second distance between the eye position of the target user and the infrared camera;
according to the first distance and the second distance, calculating a first angle required to rotate by the infrared camera;
acquiring a first center-to-center distance between the geometric center of the infrared lamp panel and the geometric center of the infrared camera;
calculating a second center-to-center distance according to the first distance and the first angle;
And calculating a second angle of the infrared lamp panel required to rotate according to the first center distance, the second center distance and the first distance.
3. The infrared lamp light-compensating device for iris image acquisition of claim 1, wherein the image processing module is configured to process the iris image, determine an infrared lamp to be adjusted in the infrared lamp panel, and include:
the image processing module is specifically used for determining an interesting region of the iris image, denoising the image of the interesting region and obtaining a denoised image of the interesting region; and calculating the average gray value of the image of the region of interest after denoising, and determining the infrared lamp to be regulated in the infrared lamp panel based on the average gray value.
4. An infrared lamp light fitting apparatus for iris image acquisition as claimed in claim 3, wherein the image processing module is configured to determine an infrared lamp to be adjusted in the infrared lamp panel based on the average gray value, and comprises:
the image processing module is specifically used for determining a definition score of the iris image according to the average gray value;
Judging whether the definition score is smaller than a definition score threshold value or not;
if the definition score is smaller than a definition score threshold, dividing the image of the denoised region of interest into a plurality of subareas according to a preset dividing rule, respectively calculating sub-average gray values of the subareas, and determining infrared lamps to be regulated in the infrared lamp panel based on the sub-average gray values of the subareas, wherein each subarea corresponds to each infrared lamp in the infrared lamp panel;
and if the definition score is not smaller than the definition score threshold, determining that no infrared lamp to be adjusted exists in the infrared lamp panel.
5. The infrared lamp light fitting apparatus for iris image acquisition according to claim 4, wherein the image processing module for determining the infrared lamp to be adjusted in the infrared lamp panel based on the sub-average gray value of each of the sub-areas comprises:
the image processing module is specifically configured to compare each sub-average gray value with a sub-average gray threshold value of each corresponding sub-region;
if a first region with the sub-average gray value smaller than the sub-average gray threshold value of each corresponding sub-region exists in each sub-region, determining that the infrared lamp corresponding to the first region is a first infrared lamp to be adjusted, wherein the infrared lamp light intensity of the first infrared lamp to be adjusted needs to be enhanced to a first target light intensity corresponding to the first region, and the first target light intensity is the light intensity corresponding to the sub-average gray threshold value corresponding to the first region.
6. The infrared light supplementary lighting device for iris image acquisition according to claim 5, wherein the image processing module is further configured to determine that the infrared light corresponding to the second region is a second infrared light to be adjusted if there is a second region in each of the sub-regions having a sub-average gray level greater than a sub-average gray level threshold of the corresponding sub-region, and the infrared light intensity of the second infrared light to be adjusted needs to be reduced to a second target light intensity corresponding to the second region, where the second target light intensity is a light intensity corresponding to the sub-average gray level threshold of the second region.
7. The infrared light compensating device for iris image acquisition of claim 1, wherein the driving circuit module is configured to output a driving signal according to the control signal, and drive the infrared light panel to compensate light for the infrared camera at the second angle according to the driving signal, and the infrared light compensating device comprises:
the driving circuit module is specifically configured to output a driving signal according to the control signal, adjust a PWM duty cycle according to the driving signal, and adjust light intensity of the infrared lamp panel according to the PWM duty cycle, so that the infrared lamp panel supplements light to the infrared camera at the second angle.
8. An infrared lamp light supplementing method for iris image acquisition, which is characterized by being applied to an infrared lamp light supplementing device for iris image acquisition, comprising the following steps:
acquiring a distance parameter between a target user and an infrared camera, and determining a first angle required to be rotated by the infrared camera and a second angle required to be rotated by an infrared lamp panel according to the distance parameter;
after the infrared camera is controlled to rotate to the first angle, acquiring iris images of the target user through the infrared camera;
determining an infrared lamp to be adjusted in the infrared lamp panel according to the iris image;
generating a control signal according to the infrared lamp to be regulated;
and outputting a driving signal according to the control signal, and controlling the infrared lamp panel to supplement light to the infrared camera at the second angle according to the driving signal.
9. The method for infrared lamp light-filling for iris image acquisition according to claim 8, wherein the determining the infrared lamp to be adjusted in the infrared lamp panel according to the iris image comprises:
determining an interesting region of the iris image, and denoising the image of the interesting region to obtain a denoised image of the interesting region; calculating the average gray value of the image of the region of interest after denoising;
Determining a definition score of the iris image according to the average gray value;
judging whether the definition score is smaller than a definition score threshold value or not;
if the definition score is smaller than the definition score threshold, dividing the image of the denoised region of interest into a plurality of subareas according to a preset dividing rule, respectively calculating sub-average gray values of the subareas, and comparing the sub-average gray values with the sub-average gray threshold of the corresponding subareas; if a first region with the sub-average gray value smaller than the sub-average gray threshold value of each corresponding sub-region exists in each sub-region, determining that the infrared lamp corresponding to the first region is a first infrared lamp to be adjusted, wherein the first infrared lamp to be adjusted is obtained by enhancing the light intensity of the infrared lamp corresponding to the first region to the light intensity corresponding to the sub-average gray threshold value;
and if the definition score is not smaller than the definition score threshold, determining that no infrared lamp to be adjusted exists in the infrared lamp panel.
10. A computer readable storage medium storing a plurality of instructions adapted to be loaded by a processor and to perform the method of any one of claims 8 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310850714.0A CN116962891A (en) | 2023-07-12 | 2023-07-12 | Iris image acquisition infrared lamp light supplementing method, device, medium and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310850714.0A CN116962891A (en) | 2023-07-12 | 2023-07-12 | Iris image acquisition infrared lamp light supplementing method, device, medium and equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116962891A true CN116962891A (en) | 2023-10-27 |
Family
ID=88455912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310850714.0A Pending CN116962891A (en) | 2023-07-12 | 2023-07-12 | Iris image acquisition infrared lamp light supplementing method, device, medium and equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116962891A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117952859A (en) * | 2024-03-27 | 2024-04-30 | 吉林大学 | Pressure damage image optimization method and system based on thermal imaging technology |
| CN117952859B (en) * | 2024-03-27 | 2024-06-07 | 吉林大学 | Pressure damage image optimization method and system based on thermal imaging technology |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201838010U (en) * | 2010-05-26 | 2011-05-18 | 中国科学院自动化研究所 | Remote iris-face integrated image acquisition and identification device |
| KR20140123864A (en) * | 2013-04-15 | 2014-10-23 | (주)마이크로디지털 | Infrared camera system with infrared LED |
| WO2018205235A1 (en) * | 2017-05-12 | 2018-11-15 | 天彩电子（深圳）有限公司 | Method for improving night vision distance and reducing power consumption, apparatus and system |
| CN214670651U (en) * | 2021-04-29 | 2021-11-09 | 北京中科虹霸科技有限公司 | Iris image acquisition apparatus and iris recognition apparatus |
| CN113920591A (en) * | 2021-03-29 | 2022-01-11 | 北京邮电大学 | Medium-distance and long-distance identity authentication method and device based on multi-mode biological feature recognition |
| US20230050340A1 (en) * | 2020-01-15 | 2023-02-16 | Chih-Yi Yang | Intelligent long-distance infrared fill-light set |
-
2023
- 2023-07-12 CN CN202310850714.0A patent/CN116962891A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201838010U (en) * | 2010-05-26 | 2011-05-18 | 中国科学院自动化研究所 | Remote iris-face integrated image acquisition and identification device |
| KR20140123864A (en) * | 2013-04-15 | 2014-10-23 | (주)마이크로디지털 | Infrared camera system with infrared LED |
| WO2018205235A1 (en) * | 2017-05-12 | 2018-11-15 | 天彩电子（深圳）有限公司 | Method for improving night vision distance and reducing power consumption, apparatus and system |
| US20230050340A1 (en) * | 2020-01-15 | 2023-02-16 | Chih-Yi Yang | Intelligent long-distance infrared fill-light set |
| CN113920591A (en) * | 2021-03-29 | 2022-01-11 | 北京邮电大学 | Medium-distance and long-distance identity authentication method and device based on multi-mode biological feature recognition |
| CN214670651U (en) * | 2021-04-29 | 2021-11-09 | 北京中科虹霸科技有限公司 | Iris image acquisition apparatus and iris recognition apparatus |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117952859A (en) * | 2024-03-27 | 2024-04-30 | 吉林大学 | Pressure damage image optimization method and system based on thermal imaging technology |
| CN117952859B (en) * | 2024-03-27 | 2024-06-07 | 吉林大学 | Pressure damage image optimization method and system based on thermal imaging technology |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI699707B (en) | Method for controlling structured light projector, depth camera and electronic device | |
| US8902328B2 (en) | Method of selecting a subset from an image set for generating high dynamic range image | |
| WO2020010848A1 (en) | Control method, microprocessor, computer readable storage medium, and computer apparatus | |
| CN108801601B (en) | Method and equipment for testing stray light noise of Fresnel lens and storage medium | |
| CN110378946B (en) | Depth map processing method and device and electronic equipment | |
| CN109685709A (en) | A kind of illumination control method and device of intelligent robot | |
| US20200225350A1 (en) | Depth information acquisition system and method, camera module, and electronic device | |
| CN113905670A (en) | Guided ultrasound imaging | |
| CN111601373A (en) | Backlight brightness control method and device, mobile terminal and storage medium | |
| CN114569047B (en) | Capsule endoscope, and distance measuring method and device for imaging system | |
| US20220287669A1 (en) | System and method for automatic light arrangement for medical visualization | |
| CN115049528A (en) | Hair image processing method, system, computer device, medium, and program product | |
| US11980420B2 (en) | Dynamic adjustment of flash intensity based on retinal pigmentation | |
| CN113545028A (en) | Gain control for face authentication | |
| CN114286014A (en) | Image database acquisition method | |
| CN109540892A (en) | Duck variety discriminating method and system | |
| CN113840125A (en) | Projector control method, projector control device, projector, and storage medium | |
| CN116962891A (en) | Iris image acquisition infrared lamp light supplementing method, device, medium and equipment | |
| WO2018223069A1 (en) | Bilirubin estimation using sclera color and accessories therefor | |
| WO2021044540A1 (en) | Control device, control method, and storage medium | |
| CN103854009B (en) | A kind of information processing method and electronic equipment | |
| US10108877B2 (en) | System for capturing pupil and method thereof | |
| US20210099631A1 (en) | Method and system for controlling an eye tracking system | |
| CN113705508A (en) | Flotation froth image acquisition and analysis method, system, medium and electronic terminal | |
| CN109829954B (en) | 3D pseudo color mapping system and mapping method thereof, and application of 3D pseudo color mapping system |
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 |