CN114374785A - Optical information acquisition device and optical information acquisition method - Google Patents
Optical information acquisition device and optical information acquisition method Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10821—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10821—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
- G06K7/10881—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices constructional details of hand-held scanners
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- 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
- H04N23/64—Computer-aided capture of images, e.g. transfer from script file into camera, check of taken image quality, advice or proposal for image composition or decision on when to take image
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- H—ELECTRICITY
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- 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
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- 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
- H04N23/741—Circuitry for compensating brightness variation in the scene by increasing the dynamic range of the image compared to the dynamic range of the electronic image sensors
Abstract
The optical information acquisition device is characterized by comprising a camera for acquiring images; the light supplement lamps are different in light supplement color; the control unit, the control unit is through triggering control camera collection image, and control a plurality of the light filling lamp is in light filling when the camera gathers the image, and is a plurality of the light filling time of light filling lamp includes first time interval and second time interval, and is a plurality of at first time interval the light filling lamp is according to the preface light filling, the control unit calculates respectively and compares the camera is a plurality of the contrast of the multiframe image of gathering during the light filling of light filling lamp, and carries out the light filling at the second time interval with the light filling lamp that the image that contrast is the biggest corresponds. The optical information acquisition device and the optical information acquisition method have the advantages that specific optical characters difficult to read are subjected to targeted light supplement in the second time period, a good reading effect is achieved, and reading efficiency is improved.
Description
Technical Field
The present disclosure relates to the field of optical information acquisition, and more particularly, to an optical information acquisition device and an optical information acquisition method.
Background art:
bar codes (barcodes), which are commonly known in the art, include one-dimensional codes and two-dimensional codes, and refer to graphic identifiers in which a plurality of bars and spaces with different widths/widths are arranged according to a certain coding rule to express a group of information. A common barcode is a parallel line pattern composed of black bars (bars for short) and white bars (spaces for short) having very different reflectivity, and a two-dimensional code is a regular two-dimensional pattern composed of black blocks and white blocks stacked together. Because the bar and the space in the bar code symbol have different reflectivity to light, the bar code scanner receives reflected light signals with different intensities and correspondingly generates electric pulses with different electric potentials. The width of the bar and the space in the bar code symbol determines the length of the electric pulse signal with different electric potential. The optical signal received by the scanner needs to be photoelectrically converted into an electrical signal and amplified by an amplifying circuit. Due to the size of the scanning spot, the blurring of the edges when the bar code is printed, and other reasons, the electrical signal of the bar code amplified by the circuit is a smooth fluctuating signal, which is called "analog electrical signal". The "analog electrical signal" needs to be shaped into a usual "digital signal". According to the coding rule correspondent to code system, the decoder can read and decode the digital signal into digital and character information. The bar code can mark many information of producing country, manufacturer, commodity name, production date, book classification number, starting and stopping place, class and date of the article, so that it can be extensively used in many fields of commodity circulation, book management, postal management and bank system
For example, barcodes are printed on various products (or packages, the same applies below) so as to facilitate management and control in production and sale of the products, the barcodes are also printed on materials with different materials and colors, and the colors of the barcodes are not limited to the original black and white colors any more, but have rich colors along with the different colors of the products.
Disclosure of Invention
The purpose of this application creation is to provide an optical information collection device and an optical information collection method that the light filling lamp light filling of a variety of colours is passed through at first period, and the light filling lamp light filling that the image that contrast ratio is the biggest corresponds in the second period in first period.
In order to achieve the purpose, the following technical means are adopted in the application:
the application provides an optical information acquisition device, its characterized in that includes: the camera is used for collecting images; the light supplement lamps are different in light supplement color; the control unit, the control unit is through triggering control camera collection image, and control a plurality of the light filling lamp is in light filling when the camera gathers the image, and is a plurality of the light filling time of light filling lamp includes first time interval and second time interval, and is a plurality of at first time interval the light filling lamp is according to the preface light filling, the control unit calculates respectively and compares the camera is a plurality of the contrast of the multiframe image of gathering during the light filling of light filling lamp, and carries out the light filling at the second time interval with the light filling lamp that the image that contrast is the biggest corresponds.
Alternatively, the control unit calculates only the contrast at a specific position in the image.
Optionally, the specific location is a location occupied by an optical character.
Optionally, a targeting unit is included to project a targeting pattern having a central spot that at least partially overlaps the specific location.
Optionally, when the control unit triggers the plurality of light supplement lamps to supplement light sequentially again, the first light supplement lamp supplements light last when the control unit triggers the collection of the image.
Optionally, the preset time of the first period is less than or equal to the preset time of the second period.
The application provides an optical information acquisition method, which is characterized by comprising the following steps: s1: controlling a camera to collect images and controlling light supplement lamps with various colors to supplement light in sequence at a first period; s2: calculating and comparing the contrast of the images collected during light supplement of the light supplement lamps with various colors; s3: and performing light supplement at a second time interval by using a light supplement lamp corresponding to the image with the maximum contrast.
Alternatively, in S2, the control unit calculates only the contrast at the position of the optical character in the image.
Optionally, in S1, the method further comprises projecting an aiming pattern aiming optical character, and when a plurality of optical characters exist in the image, in S2, the control unit calculates only a contrast of a position where the optical character overlapping with an aiming center of the aiming pattern is located.
Optionally, after S3, when the plurality of light supplement lamps are triggered to sequentially supplement light next time, the first light supplement lamp is the last light supplement lamp to supplement light when the previous time is triggered to acquire an image.
Drawings
Fig. 1 is a perspective view of an optical information acquisition device according to an embodiment of the present application;
FIG. 2 is a schematic view of the optical information gathering device of FIG. 1 from another perspective and showing components thereof through a window;
FIG. 3 is a schematic view showing a partial structure of an optical information collecting apparatus according to an embodiment of the present application, and showing an aiming pattern projected by an aiming unit;
FIG. 4 is a schematic diagram of an optical information collection device according to an embodiment of the present application projecting an aiming pattern aiming at optical information/optical characters;
fig. 5 is a timing diagram illustrating a fill-in light of the optical information acquisition device according to the embodiment of the present disclosure;
FIG. 6 is a schematic diagram of an optical information acquisition device according to an embodiment of the present application;
fig. 7 is a flowchart illustrating a method for acquiring optical information by an optical information acquisition device according to an embodiment of the present application.
Detailed description of the embodiments reference is made to the accompanying drawings in which:
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Detailed Description
When reading the bar code, a fill-in light is usually needed, and because different materials or materials with different colors have different light absorption rates and reflectivity, in order to enable the bar code printed on different materials to be read quickly, fill-in light technologies with various colors, such as red light, white light, green light, yellow light, and the like, are developed in the industry. And further, developers integrate the light supplement lamps with various colors into the same reader, and the light supplement lamps with various colors supplement light circularly, so that one reader can read the bar codes printed on different materials and with different colors.
However, for fast decoding, one cycle period of the fill-in lamps of multiple colors is also short, and the fill-in time allocated to the fill-in lamp of each color is shorter. For the bar code being read, only one of the light supplement lamps with various colors is usually the best, but the other light supplement lamps are not the best, and due to the reasons of reading the angle and the distance of the bar code, printing the read bar code by special industry and the like, when the bar code is not successfully read in the first cycle period, time is wasted by continuously adopting the light supplement lamps with various colors for cyclic light supplement.
In order to solve the above problems, the industry provides a comparison table of the material/color of the material and the color of the light supplement lamp, which is established in advance according to the difference of the material/color of the material, and when reading the bar code, the material/color of the material is identified by an image identification technology, and then the light supplement lamp with the corresponding color is used for supplementing light. However, this only holds the appearance of the problem, because even if the materials are the same material or color, the absorption rate and reflectance of light are different due to different structures or manufacturing processes, and some materials with similar appearance need to be analyzed by a professional analyzer, for example, many alloy components with similar colors are different, synthetic plastic components with similar colors are different, or artificial glass components with similar colors are different, and for paper with the same components, some paper with more compact and more light absorption rate and reflectance are different, and the materials can not be distinguished by image recognition technology, even if a comparison table is established, the error is easy to occur: in short, due to the fact that the types of materials are various, supplementary lighting of the same color by different materials of the same color has different absorptivity and reflectivity, the pre-established comparison table cannot cover all the materials, the types of the materials are difficult to identify only through an image identification technology, and the problem cannot be fundamentally solved by the pre-established comparison table of the materials and the colors of the supplementary lighting lamps.
The present application addresses the above problems by providing a new optical information acquisition apparatus and an optical information acquisition method, and adopting new methods and technical means to solve these problems.
For a better understanding of the objects, structure, features, and functions of the present application, reference should be made to the drawings and detailed description that follow.
Referring to fig. 1, an embodiment of an optical information acquisition device 1 of the present application is a scanning gun, which includes a housing 2 having a receiving cavity, and a trigger 3, a transparent scanning window 4 and a light filling window 5 disposed on the housing 2. The trigger 3 is used for triggering the scanning gun by a user to collect optical information.
Referring additionally to fig. 2, there are shown a camera 6 and a sighting unit 7 disposed in the scanning window 4, and a plurality of fill-in lamps 8 disposed in the fill-in window 5.
A plurality of the light filling colour of light filling lamp 8 is different, can select the multiple in different face light filling lamps 8 such as white light, ruddiness, green glow, blue light, yellow light according to actual demand, in an embodiment of this application, including six light filling lamps 8 that are arranged in a word, a pair of white light filling lamps 8 are located both sides respectively, a pair of ruddiness light filling lamp 8 is located central authorities, a pair of blue light filling lamp 8 is located between a pair of white light filling lamps 8 and a pair of ruddiness light filling lamp 8 for a pair of white light filling lamps 8, a pair of ruddiness light filling lamps 8 and a pair of blue light filling lamps 8 all about the central bilateral symmetry of light filling window 5 uses a pair of light filling lamps 8 of any kind of colour alone to carry out the light the illumination field that camera 6's whole visual field formed all about the central bilateral symmetry of light filling window 5, the illumination field is more even.
As shown in fig. 3, the aiming unit 7 may be a common LED (light-emitting diode) aiming unit 7, or may be a laser aiming unit 7, and these two aiming units 7 usually need to cooperate with a specific lens to generate an aiming pattern 9 with a specific shape, in this embodiment, laser aiming is preferred, which cooperates with a diffractive optical lens to generate an aiming pattern 9 with a central light spot 10 and a rectangular frame 11, where the central light spot 10 is configured to coincide with (or be close to) the center of the field of view of the camera 6, and the rectangular frame 11 is configured to coincide with or substantially coincide with the field of view of the camera 6 (generally, the rectangular frame 11 is smaller than the field of view of the camera 6).
With continued reference to fig. 3, a block diagram of a part of the structure (or logic) of the optical information acquisition device 1 according to the embodiment of the present application is shown, wherein the drawn components do not necessarily represent actual shapes, structures or sizes thereof, but only serve as an illustration. The optical information acquisition device 1 in fig. 3 further includes a control unit 12 and a storage unit 13, where the control unit 12 is electrically connected to other components to output a control instruction to control the other components, and the storage unit 13 is used to store a control program for the control unit 12 to call.
Referring to fig. 4, when a user sends a trigger signal through the trigger 3, the control unit 12 is triggered to control the aiming unit 7 to project the aiming pattern 9 to aim at a target optical character M (such as a character like a barcode or a letter) such that the target optical character M is located in the rectangular box 11 of the aiming pattern 9 and the central light spot 10 is aimed at the target optical character M such that the target optical character M is located at the center of the field of view of the camera 6. The control unit 12 further sends an instruction to control the camera 6 to capture the image of the target optical character M. When the camera 6 collects an image, the control unit 12 controls the plurality of light supplement lamps 8 to supplement light.
A plurality of light filling time of light filling lamp 8 is set for including first time interval and second time interval in advance, and at first time interval, it is a plurality of light filling lamp 8 is the light filling in proper order, and is a plurality of in this application the initial order of 8 light filling of light filling lamp is: white light, red light, blue light. When the light supplement lamp 8 of each color supplements light, the camera 6 can collect multiple frames of images, the collection period of each frame of image comprises image collection time and image transmission processing time, the control unit 12 synchronously calculates the contrast of each frame of image, and the camera 6 performs automatic exposure according to an automatic exposure control algorithm, so that the exposure parameters can be adjusted according to the contrast of the previous frame of image, and the next frame of image is expected to have larger contrast. Specifically, if the frame rate of the camera 6 is 50HZ, in order to improve the reading efficiency, the first time period is usually set to be shorter, the first time period can be set to 300 plus light 600ms, for example, the first time period is 300ms, the light supplement time of the white, red, and blue three-color light supplement lamps 8 is 100ms, when each color light supplement lamp 8 supplements light, the camera 6 can acquire 5 frames of images, and since the exposure parameters are adjusted by using the automatic exposure control algorithm, theoretically, for optical information that is easy to read, such as a simple barcode, a low-density two-dimensional code, a simple alphanumeric symbol, and the like, the reading process can be successfully read in the first time period, and if the optical information is successfully read, the control unit 12 controls to end the reading process until the next reading process is started by next triggering.
For optical information easy to be read, if the optical information is successfully read when the blue light supplement lamp 8 supplements light in a first time period, the control unit 12 controls to end the optical information reading process; next time when triggering, at first time interval, control unit 12 controls a plurality ofly 8 light filling lamps in proper order light filling, and 8 light filling lamps of first light filling are last light filling lamps 8 of light filling when finishing whole recognition and reading process for last time, because last time when 8 light filling lamps of blue light filling lamps were mended, optical information recognition succeeds, then next trigger by 8 first light filling lamps of blue light filling lamps, the light filling order of 8 light filling lamps of first time interval is blue, red, white.
Because the first period of time is short, optical information which is difficult to read, such as high-density bar codes, two-dimensional codes, DPM codes, complex character symbols and the like, cannot be successfully read in the first period of time. Fig. 5 shows that when the optical information collecting device 1 collects the optical information difficult to read, the light supplement timing chart of the light supplement lamps 8 with multiple colors is used for sequentially supplementing light to the white, red and blue light supplement lamps 8 in the first period, and the control unit 12 calculates and compares the contrast of all images in the first period, so as to obtain the image with the maximum contrast, and supplements light to the light supplement lamps 8 in the second period when collecting the image with the maximum contrast. The second time interval is usually set to be longer, for example 600-.
For example, for optical information that is difficult to read, when white light, red light, and blue light are sequentially used for supplementing light in a first period but no successful optical information is read, the control unit 12 calculates contrast of all images collected in the first period, and when the contrast of the image collected when the red light supplementing lamp 8 is used for supplementing light is maximum, the control unit 12 controls the red light supplementing lamp 8 to supplement light continuously in a second period until the reading is successful or overtime. When the next time is triggered, in a first period, the control unit 12 controls the plurality of light supplement lamps 8 to supplement light in sequence, and the light supplement sequence is red, blue and white.
The method for calculating the contrast of the image in the prior art usually calculates the contrast of the whole image, which is inefficient and is not the contrast of the target optical character M in the whole image. The identification of optical characters, such as bar codes, mainly depends on the contrast between bars and spaces of the bar codes, and when the contrast between the bars and the spaces is higher, the bar codes are relatively easier to read; the smaller the contrast between the "bar" and the "empty", the more difficult the bar code is to read. Referring to fig. 6, in this embodiment, in order to further improve the reading efficiency, the calculation process of the image contrast is also optimized, that is, for the images (P1, P2) captured by the camera 6, the control unit 12 only calculates the contrast of a specific position in the images (P1, P2), and ideally, the specific position is just the position occupied by the target optical character M, and may be implemented by the following method: the control unit 12 (or a separate image processing unit, not shown, the same applies below) segments the entire image (P1, P2), cuts out a suspicious portion Y that may be the target optical character M in the image (P1, P2), and calculates the contrast of the suspicious portion Y, which is highly likely to be the contrast of the target optical character M if only one suspicious portion Y is cut out in the entire image, and is more accurate and efficient; however, when the suspicious portions Y cut out of the whole image (P1, P2) are all likely to be the target optical character M, the contrast of the target optical character M cannot be accurately obtained. The contrast of the target optical character M in the plurality of suspicious portions Y may be further obtained by: due to the operation habit of the user, the central light spot 10 of the aiming pattern 9 is usually aligned with the target optical character M, so that the central light spot 10 overlaps at least a part of the target optical character M, when a plurality of suspected portions Y in the whole image (P1, P2) are all possible target optical characters M, only the suspected portion Y overlapping with the target central light spot 10 is cut out as the target optical character M, and the contrast of the suspected portion Y is calculated.
Further, since only the contrast of the target optical character M needs to be obtained, in the automatic exposure process, the automatic exposure is performed only according to the brightness of the target optical character M, regardless of the brightness of the background around the target optical character M.
Further, the influence of the aiming pattern 9 on the contrast calculation needs to be taken into account. With continued reference to fig. 6, since the aiming pattern 9 in the image (P1) is usually brighter (the aiming pattern 9 in P1 is black, which is only an example, the brightness of the aiming pattern 9 in the actual image is brighter, and the brightness of the aiming pattern 9 in the binarized image is usually the highest), and may even be the highest brightness part in the whole image, and when the central light spot 10 overlaps the target optical character M, the contrast of the target optical character M is more affected, so the aiming pattern 9 in the image needs to be filtered out: the aiming pattern 9 may be projected during image acquisition time and the aiming pattern 9 may be projected during image transmission processing time during an acquisition cycle of a frame of image (P1) to both aim through the aiming pattern 9 and avoid overexposure of the image due to over-brightness of the aiming pattern 9; or the aiming pattern 9 is projected when one frame image is acquired (P1), the aiming pattern 9 is not projected when the next frame image is acquired (P2), and only the contrast of the next frame image is calculated.
In an embodiment (not shown, the same applies below), the scanning window and the fill-in light window are combined into one window, and a plurality of fill-in light lamps and the cameras are arranged in the same window; further, a plurality of the fill-in lamps, the camera and the aiming unit may be integrated into a module, which is generally called a scan engine or a scan head.
In an embodiment (not shown, the same applies below), in the first period, light can be supplemented simultaneously by light supplementing lamps of different colors, for example, light can be supplemented simultaneously by red light and blue light supplementing lamps, so as to provide richer light supplementing colors, and obtain an image with a larger contrast.
In one embodiment (not shown, the same applies below), when the central light spot does not overlap the target optical character, or when a plurality of different optical characters overlap a portion of the central light spot at the same time due to a high density of optical characters, the central coordinates of the central light spot may be determined first, and then the optical character closest to the central coordinates may be determined as the target optical character.
As shown in fig. 7, which is a flowchart of a method for acquiring optical information by the optical information acquisition apparatus 1 according to the foregoing embodiment of the present application, the method includes the following steps:
s1: the camera 6 is controlled to collect images, and the light supplement lamps 8 of multiple colors are controlled to supplement light in sequence in the first period.
The initial light supplement sequence of the light supplement lamps 8 with various colors is as follows: white light, red light, blue light. The camera 6 can acquire a plurality of frames of images at the light supplement time of the light supplement lamp 8 of each color,
s2: and calculating and comparing the contrast of the images collected when the light supplement lamps 8 with various colors supplement light.
S3: and performing light supplement at a second time interval by using the light supplement lamp 8 corresponding to the image with the maximum contrast.
The second time interval is usually set to be longer, and the camera 6 has longer time to perform automatic exposure when acquiring images in the second time interval, so that images with higher contrast can be obtained theoretically, and optical information which is difficult to read in the first time interval can also be successfully read.
The optical information acquisition device and the optical information acquisition method have the following beneficial effects:
the optical information acquisition device 1 and the optical information acquisition method of the application, when the camera 6 collects images, the light supplement lamps 8 with different colors are used for supplementing light, the light supplement time is divided into a first time interval and a second time interval, the light supplement lamps 8 are used for supplementing light in sequence in the first time interval, the contrast of multi-frame images collected by the camera 6 is calculated, the light supplement lamps 8 corresponding to the images with the maximum contrast are used for supplementing light in the second time interval, so that the optical information acquisition device 1 and the optical information acquisition method are not only suitable for collecting optical information on materials with different materials/colors, but also have good reading effect on simple optical information which is easy to read, and can be successfully read in the first time interval and used for supplementing light aiming at special optical characters (such as DPM codes and Direct Part marks) which are difficult to read in the second time interval, the reading efficiency is improved.
The above detailed description is only for the purpose of illustrating the preferred embodiments of the present application, and not for the purpose of limiting the scope of the present application, therefore, all technical changes that can be made by applying the present specification and the drawings are included in the scope of the present application.
Claims (10)
1. An optical information acquisition device, comprising:
the camera is used for collecting images;
the light supplement lamps are different in light supplement color;
the control unit, the control unit is through triggering control camera collection image, and control a plurality of the light filling lamp is in light filling when the camera gathers the image, and is a plurality of the light filling time of light filling lamp includes first time interval and second time interval, and is a plurality of at first time interval the light filling lamp is according to the preface light filling, the control unit calculates respectively and compares the camera is a plurality of the contrast of the multiframe image of gathering during the light filling of light filling lamp, and carries out the light filling at the second time interval with the light filling lamp that the image that contrast is the biggest corresponds.
2. The optical information acquisition device according to claim 1, wherein: the control unit calculates only the contrast at a specific location in the image.
3. The optical information acquisition apparatus according to claim 2, wherein: the specific location is the location occupied by the optical character.
4. The optical information acquisition apparatus according to claim 2, wherein: comprising an aiming unit for projecting an aiming pattern having a central spot at least partially overlapping the specific location.
5. The optical information acquisition device according to claim 1, wherein: when the control unit triggers the plurality of light supplementing lamps again to sequentially supplement light, the first light supplementing lamp is the last light supplementing lamp for supplementing light when the previous time is triggered to acquire images.
6. The optical information acquisition device according to claim 1, wherein: the preset time of the first time interval is less than or equal to the preset time of the second time interval.
7. An optical information acquisition method, comprising the steps of:
s1: controlling a camera to collect images and controlling light supplement lamps with various colors to supplement light in sequence at a first period;
s2: calculating and comparing the contrast of the images collected during light supplement of the light supplement lamps with various colors;
s3: and performing light supplement at a second time interval by using a light supplement lamp corresponding to the image with the maximum contrast.
8. The optical information acquisition method according to claim 7, wherein: in S2, the control unit calculates only the contrast at the position of the optical character in the image.
9. The optical information acquisition method according to claim 8, wherein: s1, further comprising projecting an aiming pattern aiming optical character, and when a plurality of optical characters exist in the image, the control unit calculates a contrast of only a position where the optical character overlapping with an aiming center of the aiming pattern is located in S2.
10. The optical information acquisition method according to claim 7, wherein: and after S3, when the plurality of light supplement lamps are triggered to supplement light sequentially next time, the first light supplement lamp is the last light supplement lamp to supplement light when the previous time is triggered to acquire an image.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310943171.7A CN116939336A (en) | 2022-01-12 | 2022-01-12 | Optical information acquisition device and optical information acquisition method |
| CN202210032808.2A CN114374785A (en) | 2022-01-12 | 2022-01-12 | Optical information acquisition device and optical information acquisition method |
| PCT/CN2022/133269 WO2023134304A1 (en) | 2022-01-12 | 2022-11-21 | Optical information collection apparatus and optical information collection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210032808.2A CN114374785A (en) | 2022-01-12 | 2022-01-12 | Optical information acquisition device and optical information acquisition method |
Related Child Applications (1)
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| WO2023134304A1 (en) * | 2022-01-12 | 2023-07-20 | 深圳盈达信息科技有限公司 | Optical information collection apparatus and optical information collection method |
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| CN116939336A (en) * | 2022-01-12 | 2023-10-24 | 深圳盈达信息科技有限公司 | Optical information acquisition device and optical information acquisition method |
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- 2022-01-12 CN CN202310943171.7A patent/CN116939336A/en active Pending
- 2022-01-12 CN CN202210032808.2A patent/CN114374785A/en active Pending
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| WO2023134304A1 (en) | 2023-07-20 |
| CN116939336A (en) | 2023-10-24 |
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