CN105403235A - Two-dimensional positioning system and method - Google Patents
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Abstract
The invention provides a positioning system and method to determine the location of a terminal by a stealth code. A two-dimensional coordinate is encoded using a stealth code and is printed onto a planar or curved medium, a subject to be positioned identifies an optical stealth code corresponding to an optical image in a positioning medium layer at a current position of the subject through a positioning device, and the stealth code is decoded to obtain position information of the current position. The invention can quickly achieve the positioning of the terminal with the positioning accuracy up to a millimeter, are low in cost for construction and maintenance, and can provide a high accuracy and low cost solution for applications such as chess, board games, toys, education, robots and the like.
Description
Technical Field
The present invention relates to positioning technologies, and in particular, to a method and a system for positioning in a two-dimensional space.
Background
Continuous positioning in two-dimensional space is required in many application fields such as industrial pipelines, table games, robot toys, and the like. The existing positioning technologies such as GPS, WiFi, wireless base station, iBeacon and the like can realize wireless positioning of three-dimensional space, but the positioning accuracy is generally low, and position reference points and signal transmitting points need to be arranged in advance, so that the positioning method is suitable for application occasions with large positioning scale and low accuracy requirement. The existing RFID technology can also be used to implement the positioning function, but for cost and size reasons, the RFID technology is only suitable for location identification application of sparse discrete points. The existing active scanning technologies such as infrared, ultrasonic, laser, stereo camera and the like can obtain three-dimensional space information of an environment, have high positioning precision, do not need to arrange signal emission points in advance, but need strong CPU processing capacity to obtain and process three-dimensional geometric data, and have complex calculation and high cost. The existing technologies such as plotters, handwriting pads, touch screens and the like can also be used as a two-dimensional positioning technology, but the technology generally needs a special circuit board for sensing two-dimensional coordinate information, and the cost is usually high. The relative position of a terminal can be obtained by the existing mouse and accelerometer technology, but the initial position needs to be appointed for positioning, and the positioning precision is difficult to guarantee if error accumulation cannot be corrected in time.
Disclosure of Invention
It is therefore an object of the present invention to overcome the above-mentioned drawbacks of the prior art and to provide a two-dimensional positioning system and method.
The purpose of the invention is realized by the following technical scheme:
in one aspect, the present invention provides a positioning system for two-dimensional space, comprising:
the positioning medium layer covers the surface of the two-dimensional space and is divided into a plurality of positioning areas, and optical invisible codes contained in the same positioning area are the same; the optical invisible code of each positioning area corresponds to position information of the two-dimensional space;
and the positioning device is used for identifying the optical invisible codes in the positioning medium layer and acquiring the position information of the positioning area corresponding to the optical invisible codes.
In the above positioning system, the surface of the two-dimensional space may be a plane or a curved surface.
In the above positioning system, the size of each positioning area is at least equivalent to the size of the optical image corresponding to a single optical invisible code.
In the above positioning system, the positioning medium layer may be a coating layer including an optical image corresponding to the optical invisible code.
In the above positioning system, the position information of the positioning area in the two-dimensional space may be a coordinate of a central point of the positioning area in the two-dimensional space.
In the above positioning system, the position information of the positioning area in the two-dimensional space may be coordinates of a reference point set in the positioning area in the two-dimensional space.
In the above positioning system, the position information of the positioning area in the two-dimensional space may be a coordinate of any point in the positioning area in the two-dimensional space.
In the above positioning system, the positioning device may include an optical invisible code identifier and a decoder; wherein:
the optical invisible code recognizer is used for acquiring an optical image in the positioning medium layer and recognizing an optical invisible code corresponding to the optical image;
the decoder is used for converting the optical invisible code identified by the optical invisible code identifier into the position information of the positioning area corresponding to the optical invisible code according to the corresponding relation between the optical invisible code and the position information in the two-dimensional space;
in the above positioning system, the positioning device may further include a storage unit for storing the optical invisible code and the corresponding position information thereof.
In the above positioning system, the system may further include a positioning server, and the positioning device includes an optical cryptogram identifier and a communication unit for communicating with the positioning server; wherein,
the optical invisible code recognizer is used for acquiring an optical image in the positioning medium layer and recognizing an optical invisible code corresponding to the optical image;
the positioning device sends the optical invisible code identified by the optical invisible code identifier to the positioning server through the communication unit;
and the positioning server converts the received optical invisible code into the position information of the positioning area corresponding to the optical invisible code based on the corresponding relation between the optical invisible code and the position information in the two-dimensional space.
In another aspect, the present invention provides a positioning method based on the above positioning system, where the method includes:
step 1) identifying and positioning optical invisible codes contained in a medium layer through a positioning device;
and 2) obtaining the position information of the corresponding positioning area according to the optical invisible code.
In the above positioning method, the step 1) may include:
step 11) acquiring an optical image in the positioning medium layer;
and step 12), identifying the acquired optical image, judging whether an optical invisible code corresponding to the optical image exists, and if not, returning to the step 11) to acquire the optical image again until the optical invisible code is identified.
In the above positioning method, in the step 2), the positioning device may convert the identified optical invisible code into the position information of the positioning area corresponding to the optical invisible code according to a corresponding relationship between the optical invisible code and the position information in the two-dimensional space.
In the above positioning method, the step 2) may include:
sending, by the positioning device, the identified optical covert code to a positioning server;
and converting the identified optical invisible codes into the position information of the positioning areas corresponding to the optical invisible codes by the positioning server according to the corresponding relation between the optical invisible codes and the position information in the two-dimensional space.
In yet another aspect, the present invention provides a gaming system, comprising:
a master control terminal for conducting a game activity in a two-dimensional space and a plurality of character terminals in communication with the master control terminal, an
The positioning medium layer covers the surface of the two-dimensional space and is divided into a plurality of positioning areas, and optical invisible codes contained in the same positioning area are the same; the optical invisible code of each positioning area corresponds to position information of the two-dimensional space;
the role terminal comprises a positioning device, wherein the positioning device is used for identifying the optical invisible codes in the positioning medium layer and acquiring the position information of the positioning area corresponding to the optical invisible codes.
In the game system, the surface of the two-dimensional space may be a plane or a curved surface.
In the above game system, the minimum size of each positioning region may correspond to the size of the optical image corresponding to a single optical invisible code.
In the game system, the positioning medium layer may be a coating layer including an optical image corresponding to the optical invisible code.
In the game system, the position information of the positioning area in the two-dimensional space may be a coordinate of a center point of the positioning area in the two-dimensional space.
In the game system, the position information of the positioning area in the two-dimensional space may be coordinates of a reference point set in the positioning area in the two-dimensional space.
In the game system, the position information of the positioning area in the two-dimensional space may be a coordinate of any point in the positioning area in the two-dimensional space.
In the game system, the positioning device may comprise an optical invisible code identifier and a decoder; wherein:
the optical invisible code recognizer is used for acquiring an optical image on the positioning medium layer and recognizing an optical invisible code corresponding to the optical image;
the decoder is used for converting the optical invisible codes identified by the optical invisible code identifier into corresponding position information according to the corresponding relation between the optical invisible codes and the position information in the two-dimensional space.
In the game system, the character terminal may report the position information to the main control terminal and/or other character terminals, and the main control terminal controls the character terminal and/or other character terminals to execute corresponding actions based on the position information.
In the game system, the character terminal may further execute a corresponding action based on the position information reported from the other character terminals
In the game system, the positioning device may include an optical invisible code identifier, where the optical invisible code identifier is used to obtain an optical image on the positioning medium layer and identify an optical invisible code corresponding to the optical image;
the role terminal sends the identified optical invisible code to the master control terminal;
and the main control terminal converts the received optical invisible codes into the position information of the positioning area corresponding to the optical invisible codes based on the corresponding relation between the optical invisible codes and the position information in the two-dimensional space.
In the game system, the main control terminal may control the character terminal and/or other character terminals to perform corresponding actions based on the obtained location information.
In the above game system, the character terminal or the main control terminal may further include a storage unit configured to store the optical hidden code and the position information corresponding thereto.
In the game system, the storage unit may be further configured to store position information of the character terminal acquired each time.
The game system can also comprise a paster attached to the positioning medium layer, wherein the paster is provided with a hidden code; and the role terminal or the main control terminal executes corresponding actions by acquiring the invisible codes on the paster.
Compared with the prior art, the invention has the advantages that:
the two-dimensional coordinate information corresponding to the position of the two-dimensional space is coded by the invisible codes and printed on a plane or curved surface medium, so that the terminal can realize quick positioning of the two-dimensional space on the plane or curved surface, the positioning precision can reach millimeter level, and the construction and maintenance cost is very low, thereby providing high-precision and low-cost two-dimensional space continuous positioning for chess, board games, toys, education, robots and other application occasions.
Drawings
Embodiments of the invention are further described below with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a positioning system for two-dimensional space according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a positioning device according to an embodiment of the present invention;
FIG. 3 is a flow chart of a positioning method for two-dimensional space according to an embodiment of the present invention;
fig. 4 is a schematic plan view of a game system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail by embodiments with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Optical covert codes (hereinafter also referred to simply as covert codes), such as OID codes, can be concealed in normal printed matter by standard printing procedures and standard inks. The code value which is hidden in the printed matter in advance can be taken out by scanning the coding pattern corresponding to the optical invisible code through the optical invisible code identifier. The coded pattern (also called optical image or invisible code base code) corresponding to each invisible code is a pattern formed by a plurality of fine dots which are difficult to be perceived by human eyes and can be hidden in the color pictures and texts of various printed matters, so the optical invisible code is named. The optical image corresponding to the invisible code has good distribution uniformity, so that the interference to vision is effectively reduced, the attractive influence on printed matters is avoided, the requirement on printing paper is reduced, and the invisible optical image can be attached to any plane. For example, the invisible code can be hidden in the color pictures and texts of various printed matters by adding the optical image printing corresponding to the invisible code to the traditional three-plate color printing.
Fig. 1 shows a two-dimensional space positioning system based on invisible codes according to an embodiment of the invention. The system 100 includes a positioning medium layer 101 and a positioning device 102. The positioning medium layer 102 carries a positioning device 101, and the positioning device 101 can move on the positioning medium layer 102. The positioning medium layer 101 covers the surface of the two-dimensional space where the main body to be positioned moves, and includes an optical invisible code. The surface of the two-dimensional space may be a plane or a curved surface. The positioning medium layer 101 may be a coating layer that is attached to the surface of the two-dimensional space by using various existing invisible code printing methods such as printing or inkjet printing and that includes an optical image corresponding to the optical invisible code. All carbon-containing ink can be used for printing or spraying optical images corresponding to the optical invisible codes on the surface of the two-dimensional space. Of course, besides the positioning medium layer, other figures or characters can be sprayed and painted on the surface of the two-dimensional space.
The positioning medium layer 101 is divided into a plurality of positioning areas, different positioning areas correspond to different optical invisible codes, and the optical invisible codes contained in the same positioning area are the same, that is, each positioning area is usually covered by a plurality of optical images of the same optical invisible code. The position information of each positioning area in the two-dimensional space corresponds to the optical invisible code contained in the positioning area. In one embodiment, the position information of each positioning region in the two-dimensional space is represented by coordinate information of a center point of the positioning region in the two-dimensional space. The coordinate information may be represented by any suitable coordinate for a two-dimensional plane, such as cartesian plane rectangular coordinates, gaussian plane rectangular coordinates, and the like. In yet another embodiment, the position information of each positioning region in the two-dimensional space is represented by coordinate information of a positioning reference point set in the positioning region in the two-dimensional space. In yet another embodiment, the position information of each positioning region in the two-dimensional space can be represented by coordinate information of any point in the positioning region in the two-dimensional space. In one embodiment, the positioning area may be divided according to actual positioning accuracy requirements. The size of each positioning area is at least the size of the optical image corresponding to a single optical invisible code, for example, a few millimeters. That is, if each positioning area is only covered by the optical image of a single optical invisible code, the positioning precision can reach millimeter level. The correspondence between the optical invisible code and the position information of the positioning area can be preserved by various data structures such as tables, arrays and the like. In one embodiment, the correspondence between the optical invisible code and the position information of the positioning area is stored in the positioning device 102. In yet another embodiment, the correspondence between the optical invisible code and the position information of the positioning area is stored in another device that can communicate with the positioning device 102, such as the positioning server 103 (not shown) of the two-dimensional space.
For each body to be positioned that is moving in two dimensions, it is equipped with a positioning device 102. The positioning device 102 is configured to identify an optical invisible code at a current position of a main body to be positioned that moves in a two-dimensional space, and acquire position information corresponding to the optical invisible code. A main body moving in a two-dimensional space carries or is equipped with a positioning device 102, an optical invisible code contained in a positioning medium layer at the current position of the main body is identified through the positioning device 102, and position information corresponding to the optical invisible code acquired through the positioning device 102 is used as the current position of the main body.
Fig. 2 shows a schematic structural diagram of a positioning device according to an embodiment of the present invention. The positioning device 200 comprises an optical crypto-code identifier 201 and a decoder 202. The positioning apparatus 200 may further include a memory 203 for storing a correspondence between the position information of the positioning region in the two-dimensional space and the optical invisible code. The optical invisible code identifier 201 is configured to acquire an optical image of a current position of a moving subject to be positioned in a two-dimensional space, and further identify an optical invisible code corresponding to the optical image. Various means for recognizing the optical invisible code are available to those skilled in the art. According to one embodiment of the present invention, the optical covert code identifier 201 includes a scanning unit and an identification chip. The scanning unit is an optical camera or a dedicated optical sensor chip, such as an image sensor chip SN9S102CE manufactured by john company, for obtaining an optical image at the current position. The identification chip is a computer system such as an ARM or a dedicated digital processing chip, such as an image recognition chip SN9P701FG produced by john company, and is used for identifying the optical invisible code corresponding to the acquired optical image. The optical cryptogram identifier 201 provides the identified optical cryptogram to the decoder 202. The decoder 202 receives the optical steganographic code identified by the optical steganographic code identifier 201, and converts the received optical steganographic code into position information of a positioning region corresponding to the optical steganographic code based on a correspondence between the position information of the positioning region in the two-dimensional space and the optical steganographic code. Decoder 202 may be hardware logic such as an integrated circuit chip, Field Programmable Gate Array (FPGA), Application Specific Integrated Circuit (ASIC), etc. implementation; alternatively, the decoder may be implemented in software or programmable code executed by a processor on hardware such as an embedded system, a single-chip Microprocessor (MCU), etc., which may be implemented by any programming language known today, such as LISP, PERL, C + +, C #, PROLOG, or any bytecode language such as JAVA.
According to yet another embodiment of the present invention, the two-dimensional spatial location system 100 further comprises a location server, and the location device 102 comprises an optical covert code identifier as discussed above and a communication unit in communication with the location server. The positioning device 102 sends the optical cryptogram identified via the optical cryptogram identifier to the positioning server through the communication unit. The positioning server converts the received optical invisible code from the positioning device 102 into the position information of the positioning area corresponding to the optical invisible code according to the corresponding relationship between the position information of the positioning area in the two-dimensional space and the optical invisible code. In one embodiment, the positioning server may include a storage unit configured to store a correspondence between position information of a positioning area in the two-dimensional space and the optical invisible code. The location server may return the obtained location information to the location device 102. Or the positioning server may provide the obtained position information to the subject to be positioned carrying or equipped with the positioning device 102. The location server and the location device 102 may communicate in any wired or wireless manner. The positioning server may be hardware logic such as an integrated circuit chip, Field Programmable Gate Array (FPGA), Application Specific Integrated Circuit (ASIC), etc. implementation; alternatively, the location server may be implemented in the form of software or programmable code executed by a processor on hardware such as an embedded system, a single chip Microcomputer (MCU), a PC or a server, which may be implemented by any programming language currently known, such as LISP, PERL, C + +, C #, PROLOG, or any bytecode language such as JAVA.
Fig. 3 is a flow chart of a positioning method using a two-dimensional space positioning system according to an embodiment of the present invention. As shown in fig. 3, the positioning method mainly includes the following steps:
step 301), an optical image on the positioning medium layer at the current position of the main body to be positioned is obtained. As discussed above, each main body is equipped with a positioning device, and an optical cryptogram identifier in the positioning device scans a positioning medium layer at the current position of the main body to be positioned in the two-dimensional space by using a scanning unit (an optical sensor or an optical camera) of the optical cryptogram identifier, so as to acquire an optical image on the positioning medium layer at the current position of the main body.
Step 302), identifying the acquired optical image, judging whether a invisible code corresponding to the optical image exists, and if not, returning to the step 301) to continuously acquire the optical image again; and if the optical invisible code corresponding to the acquired optical image exists, the step 303) is carried out continuously. This is because the optical image acquired by scanning the positioning medium layer in step 301) may not be the complete encoded pattern of the invisible code. If the acquired optical image is not the encoded pattern of the covert code, the positioning device can be adjusted appropriately at the current position of the subject to be positioned, and the optical image at the current position can be rescanned until the optical covert code is identified.
Step 303), position information corresponding to the identified optical invisible code is acquired to indicate the current position of the subject. As discussed above, each positioning region of the positioning medium layer corresponds to a different optical invisible code, and the position information of each positioning region in the two-dimensional space corresponds to the optical invisible code contained in the positioning region. And decoding the identified optical invisible code based on the corresponding relation between the position information of the positioning area in the two-dimensional space and the optical invisible code to obtain the position information of the corresponding positioning area as the current position of the main body. The corresponding relation between the optical invisible code and the position information of the positioning area can be stored in the positioning device, and can also be stored in the professional positioning server 103 of the two-dimensional space.
FIG. 4 presents a schematic plan view of a gaming system in accordance with an embodiment of the present invention. The game system includes a plurality of character terminals 401A, 401B, … 401N (generally designated by reference numeral 401), a master terminal 402, and a positioning media layer 403. The character terminal 401 and the main control terminal 402 are both located above the positioning medium layer 403. The character terminal 401 may communicate with the main control terminal 402 in any wired or wireless manner. The character terminal 401 is a main character moving in a two-dimensional space in which a game is played, such as a chess piece, a dolly, or the like. The main control terminal 402 is a main body that is fixed or movable in the two-dimensional space and controls the behavior of each character terminal 401, such as a machine officer, a host robot, and the like. The positioning medium layer 403 covers a plane or a curved surface (such as a chessboard, a game board, a globe, etc.) of the two-dimensional space where the character terminal 401 and the main control terminal 402 move, and contains optical hidden codes. The main control terminal 402 and the role terminal 401 are carried on the positioning medium layer 403. The positioning medium layer 403 may be a coating layer that is attached to the surface of the two-dimensional space by using various existing invisible code printing methods, such as printing or inkjet printing, and that includes an optical image corresponding to the optical invisible code. In addition, the positioning medium layer 203 can be printed or painted with game-related graphics, such as a chessboard, a map, game patterns, and the like.
As discussed above, the positioning medium layer 403 is divided into a plurality of positioning areas, different positioning areas correspond to different optical invisible codes, and the same positioning area contains the same optical invisible codes. The position information of each positioning area in the two-dimensional space corresponds to the optical invisible code contained in the positioning area. The position information of the positioning area in the two-dimensional space may be represented by a center point of the positioning area, a positioning reference point set in the positioning area, or coordinate information of any point in the positioning area in the two-dimensional space. The coordinate information may be represented by any suitable coordinate for a two-dimensional plane, such as cartesian plane rectangular coordinates, gaussian plane rectangular coordinates, and the like. The size of the positioning area can be divided according to the actual positioning precision requirement, but the size of each positioning area is at least the size of the optical image corresponding to a single optical invisible code, for example, several millimeters. That is, if each positioning area is covered by only a single optical image of the optical invisible code, the positioning accuracy of the character terminal 401 can reach millimeter level.
With continued reference to fig. 4, in one embodiment, each character terminal 401 includes a positioning device as discussed above. In one embodiment, the positioning device of each character terminal 401 includes an optical crypto-code identifier and decoder as described above. The role terminal 401 acquires an optical image on the positioning medium layer at the current position of the role terminal through an optical invisible code identifier in the positioning device, and further identifies an optical invisible code corresponding to the optical image; and then, based on the corresponding relation between the position information of the positioning area of the two-dimensional space and the optical invisible code, converting the identified optical invisible code into the position information of the positioning area corresponding to the optical invisible code through a decoder. In an embodiment, the role terminal 401 may send the obtained current location information to the main control terminal and/or other role terminals in a wired or wireless manner. The master terminal 402 may instruct each character terminal 401 and/or other character terminals to perform corresponding actions based on the location information from the character terminal 401. Other character terminals receiving the position information can also execute corresponding actions according to the information. In one embodiment, the character terminal 401 further includes a storage unit, configured to store a correspondence between position information of a positioning area in the two-dimensional space and an optical invisible code.
In another embodiment, the main control terminal 401 further includes a storage unit, configured to store a corresponding relationship between the position information of the positioning area in the two-dimensional space and the optical invisible code. In yet another embodiment, master terminal 402 may also act as a location server as discussed above, and the location device of character terminal 401 includes the optical crypto-code identifier described above. The character terminal 401 identifies the optical image on the positioning medium layer 403 at the current position thereof through the optical invisible code identifier, identifies the optical invisible code corresponding to the optical image, and then sends the identified optical invisible code to the main control terminal 402. The main control terminal 402 converts the received optical invisible code from the character terminal 401 into the position information of the positioning area corresponding to the optical invisible code according to the corresponding relationship between the position information of the positioning area in the two-dimensional space and the optical invisible code, thereby obtaining the current position of the character terminal 401. The master terminal 402 may instruct the character terminal 401 or other character terminals to perform corresponding actions based on the obtained location information of the character terminal 401. The master terminal 402 may transmit the obtained location information of the character terminal 401 to the character terminal or other character terminals. Other character terminals receiving the position information can also execute corresponding actions according to the information.
In one embodiment, the master terminal 402 is also provided with an audio or video input/output interface and other components related to actions, expressions, etc., such as motor-driven ears, a display screen for displaying facial expressions, etc., to facilitate communication of information with the game player. In yet another embodiment, the master control terminal 402 also has autonomous moving means, such as wheels or tracks driven by motors, that move autonomously or controllably over the positioning media layer 403. In another embodiment, the master control terminal 402 establishes a communication link with the internet in a wireless or wired manner. Thus, the main control terminal 402 can obtain the update of the program, data and game content from the internet. In other embodiments, the user uses a device such as a mobile phone, a remote control device, etc. to establish a connection with the main control terminal 402 through a wireless network, and sends control instructions to the main control terminal to control its behavior or to control the behavior of the character terminal through the main control terminal.
In one embodiment, the character terminal 401 has autonomous moving members, such as wheels or tracks driven by motors, that can move autonomously or controllably over the positioning medium layer 403. Communication links can be established between the role terminals and the main control terminal in a wireless or wired mode. The role terminal 401 may report its current location to the master control terminal or other role terminals through the communication link. The main control terminal 402 may issue a control command to the character terminal 401 through a communication link or transmit data related to a game or an update program or the like. The control command sent by the main control terminal to the role terminal comprises instructions for indicating the role terminal to move a specified offset distance or a specified position, play sound, expression or video, shake or rotate and the like. The character terminal 401 executes a corresponding action according to the control command from the main control terminal 402. The role terminal can also receive the position data reported by other role terminals and execute corresponding actions according to the current specific situation.
In another embodiment, the character terminal 401 or the main control terminal 402 further includes a storage unit, configured to store the position information of the character terminal acquired each time, so as to provide a moving path of each character terminal within a certain time period.
In yet another embodiment, the gaming system further includes a sticker 404 with a covert code thereon and which may be printed with various logos, patterns, or images. For example, the sticker may be a small card with a covert code. The sticker can be attached to the positioning medium layer 403 according to the game requirements. The character terminal 401 or the main control terminal 402 executes corresponding actions by acquiring the invisible codes on the sticker 404.
The game system according to the above embodiment can be applied to applications such as table games, robot toys, and the like. Such a game system provides a high precision, low cost solution for chess, board games, toys, education, robotics, and the like applications.
Although the present invention has been described by way of preferred embodiments, the present invention is not limited to the embodiments described herein, and various changes and modifications may be made without departing from the scope of the present invention.
Claims (10)
1. A positioning system for a two-dimensional space, the system comprising:
the positioning medium layer covers the surface of the two-dimensional space and is divided into a plurality of positioning areas, and optical invisible codes contained in the same positioning area are the same; the optical invisible code of each positioning area corresponds to position information of the two-dimensional space;
and the positioning device is used for identifying the optical invisible codes in the positioning medium layer and acquiring the position information of the positioning area corresponding to the optical invisible codes.
2. The positioning system of claim 1, wherein the surface of the two-dimensional space is a plane or a curved surface.
3. The positioning system of claim 1, wherein each positioning region has a size minimally equivalent to a size of an optical image corresponding to a single optical covert code.
4. The positioning system of claim 1, wherein the positioning medium layer is a coating comprising an optical image corresponding to the optical invisible code.
5. The positioning system according to claim 1, wherein the position information of the positioning area in the two-dimensional space is coordinates of a center point of the positioning area in the two-dimensional space.
6. The positioning system according to claim 1, wherein the positional information of the positioning area in the two-dimensional space is coordinates of a reference point set in the positioning area in the two-dimensional space.
7. The positioning system of claim 1, the positioning device comprising an optical crypto-code identifier and a decoder; wherein:
the optical invisible code recognizer is used for acquiring an optical image in the positioning medium layer and recognizing an optical invisible code corresponding to the optical image;
the decoder is used for converting the optical invisible code identified by the optical invisible code identifier into the position information of the positioning area corresponding to the optical invisible code according to the corresponding relation between the optical invisible code and the position information in the two-dimensional space.
8. The positioning system of claim 1, further comprising a positioning server, and the positioning device comprises an optical crypto-code identifier and a communication unit for communicating with the positioning server; wherein,
the optical invisible code recognizer is used for acquiring an optical image in the positioning medium layer and recognizing an optical invisible code corresponding to the optical image;
the positioning device sends the optical invisible code identified by the optical invisible code identifier to the positioning server through the communication unit;
and the positioning server converts the received optical invisible code into the position information of the positioning area corresponding to the optical invisible code based on the corresponding relation between the optical invisible code and the position information in the two-dimensional space.
9. A positioning method based on the positioning system according to any of the preceding claims 1-8, the method comprising:
step 1) identifying and positioning optical invisible codes contained in a medium layer through a positioning device;
and 2) obtaining the position information of the corresponding positioning area according to the optical invisible code.
10. The method of claim 9, the step 1) comprising:
step 11) acquiring an optical image in the positioning medium layer;
and step 12), identifying the acquired optical image, judging whether an optical invisible code corresponding to the optical image exists, and if not, returning to the step 11) to acquire the optical image again until the optical invisible code is identified.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410467001.7A CN105403235A (en) | 2014-09-15 | 2014-09-15 | Two-dimensional positioning system and method |
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| CN108871339A (en) * | 2018-06-29 | 2018-11-23 | 深圳市富微科创电子有限公司 | A kind of positioning system and method based on OID coding |
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