CN116680349A - Map processing method and device based on blockchain, electronic equipment and medium - Google Patents
Map processing method and device based on blockchain, electronic equipment and medium Download PDFInfo
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Abstract
The embodiment of the disclosure discloses a map processing method, a map processing device, electronic equipment and a map processing medium based on a blockchain, wherein the method comprises the following steps: collecting images of a preset area through a plurality of first user ends; the first user side comprises at least one image acquisition device, and the preset area is determined according to at least one area included in the target map; encrypting the image through a symmetric encryption key, uploading the encrypted image obtained by encryption to a distributed storage system for storage, and uploading an image address corresponding to the encrypted image to a blockchain; the block chain determines an image address corresponding to the acquisition request according to the received acquisition request of the second user side; obtaining the encrypted image corresponding to the image address from the distributed storage system based on the image address; and decrypting the encrypted image to obtain an image corresponding to the acquisition request, and updating or complementing the target map based on the image.
Description
Technical Field
The disclosure relates to map processing technology, in particular to a block chain-based map processing method, a block chain-based map processing device, electronic equipment and a block chain-based map processing medium.
Background
The three-dimensional scene object data provides rich environmental information, and the capability of mechanical equipment for coping with the forestry complex and changeable sites is better improved. To recognize the real world, artificial intelligence systems must understand three-dimensional visual scenes. The scene and object depicted by the image and video itself remains two-dimensional, while the real artificial intelligence system must understand the three-dimensional structure of the scene and object from the image and video to interact with it. Therefore, how to understand and reconstruct a three-dimensional scene becomes an important research topic in research fields and industrial applications. Computer graphics and computer vision are two reciprocal complementary directions. The former uses geometry to represent the virtual world and the latter uses images and video to represent the real world. The three-dimensional model provides an interactive interface to the virtual space for the user, but its realism depends on modeling and rendering techniques for texture, illumination, motion, etc. of the model.
Disclosure of Invention
The embodiment of the disclosure provides a map processing method, a map processing device, electronic equipment and a map processing medium based on a blockchain.
According to an aspect of the embodiments of the present disclosure, there is provided a blockchain-based map processing method, including:
collecting images of a preset area through a plurality of first user ends; the first user side comprises at least one image acquisition device, and the preset area is determined according to at least one area included in the target map;
encrypting the image through a symmetric encryption key, uploading the encrypted image obtained by encryption to a distributed storage system for storage, and uploading an image address corresponding to the encrypted image to a blockchain;
the block chain determines an image address corresponding to the acquisition request according to the received acquisition request of the second user side; the acquisition request is determined according to a target area which is missing or needs to be updated in the target map;
obtaining the encrypted image corresponding to the image address from the distributed storage system based on the image address;
and decrypting the encrypted image to obtain an image corresponding to the acquisition request, and updating or complementing the target map based on the image.
Optionally, before determining the image address corresponding to the acquisition request according to the received acquisition request of the second user side, the blockchain further includes:
The blockchain receives a registration request of the second user terminal and generates a pair of public key and private key according to the registration request;
and sending the public key and the private key to the second user side.
Optionally, the decrypting the encrypted image to obtain an image corresponding to the acquisition request, updating or complementing the target map based on the image includes:
the second user side uploads the public key to the blockchain through an intelligent contract, and the public key is sent to the first user side through the blockchain;
the first user side generates a conversion key based on the public key through a conversion key generation algorithm;
matching a condition value corresponding to the conversion key with a condition value corresponding to a symmetric encryption key of the first user side through the blockchain, and re-encrypting the symmetric encryption key by using a proxy re-encryption key when the condition values are the same to obtain re-encryption information and transmitting the re-encryption information to the second user side;
the second user end decrypts the re-encrypted information through the private key to obtain the symmetric encryption key, decrypts the encrypted image based on the symmetric encryption key to obtain an image corresponding to the acquisition request, and updates or completes the image to the target map.
Optionally, the encrypting the image by the symmetric encryption key, uploading the encrypted image obtained by encryption to a distributed storage system for storage, and before uploading the image address corresponding to the encrypted image to a blockchain, further includes:
performing quality screening on the image to obtain an image passing the quality screening;
the encrypting the image by the symmetric encryption key, uploading the encrypted image obtained by encryption to a distributed storage system for storage, and uploading the image address corresponding to the encrypted image to a blockchain, comprising:
encrypting the image passing through the quality screening and attribute information corresponding to the image through the symmetric encryption key to obtain the encrypted image; the attribute information comprises equipment parameters, uploading time, image acquisition position information and view angle directions;
uploading the encrypted image to a distributed storage system for storage, and uploading an image address corresponding to the encrypted image to a blockchain.
Optionally, before the capturing the images of the preset area by the plurality of first user ends, the method further includes:
generating an acquisition thermodynamic diagram corresponding to the target map in the blockchain; the acquired thermodynamic diagrams represent the acquired frequency and position of each region through different identifiers;
And determining a preset area in the target map according to the acquisition thermodynamic diagram.
Optionally, the determining the preset area in the target map according to the acquired thermodynamic diagram includes:
estimating an estimated return value obtained by the first user side for image acquisition of each region according to the thermodynamic value corresponding to each region in the acquired thermodynamic diagram;
and determining a preset area in the target map based on the estimated return value.
Optionally, the method further comprises:
determining a data return value corresponding to the image according to the quality of the image, the thermal value corresponding to the preset area and the attribute information corresponding to the image;
and feeding the data return value back to the first user terminal.
Optionally, before determining the image address corresponding to the acquisition request according to the received acquisition request of the second user side, the blockchain further includes:
the second user side obtains interaction information corresponding to the target map from the blockchain, and determines the target area which is missing or needs to be updated in the target map;
determining at least one coordinate point in the target map as a coordinate point to be requested by combining the corresponding view angle direction during image acquisition based on all coordinate information corresponding to the target area;
And determining the acquisition request based on the coordinate point to be requested.
According to another aspect of the embodiments of the present disclosure, there is provided a blockchain-based map processing device including:
the image acquisition module is used for acquiring images of a preset area through a plurality of first user ends; the first user side comprises at least one image acquisition device, and the preset area is determined according to at least one area included in the target map;
the image uploading module is used for encrypting the image through a symmetric encryption key, uploading the encrypted image obtained by encryption to a distributed storage system for storage, and uploading an image address corresponding to the encrypted image to a block chain;
the address acquisition module is used for determining an image address corresponding to the acquisition request according to the received acquisition request of the second user terminal through the blockchain; the acquisition request is determined according to a target area which is missing or needs to be updated in the target map;
an image acquisition module, configured to obtain, from the distributed storage system, the encrypted image corresponding to the image address based on the image address;
and the map processing module is used for decrypting the encrypted image to obtain an image corresponding to the acquisition request, and updating or complementing the target map based on the image.
Optionally, the apparatus further comprises:
the registration module is used for receiving a registration request of the second user side by the blockchain and generating a pair of public key and private key according to the registration request; and sending the public key and the private key to the second user side.
Optionally, the map processing module is specifically configured to upload a public key to the blockchain through an intelligent contract by the second user side, and send the public key to the first user side through the blockchain; the first user side generates a conversion key based on the public key through a conversion key generation algorithm; matching a condition value corresponding to the conversion key with a condition value corresponding to a symmetric encryption key of the first user side through the blockchain, and re-encrypting the symmetric encryption key by using a proxy re-encryption key when the condition values are the same to obtain re-encryption information and transmitting the re-encryption information to the second user side; the second user end decrypts the re-encrypted information through the private key to obtain the symmetric encryption key, decrypts the encrypted image based on the symmetric encryption key to obtain an image corresponding to the acquisition request, and updates or completes the image to the target map.
Optionally, the apparatus further comprises:
the quality screening module is used for carrying out quality screening on the images to obtain images passing the quality screening;
the image uploading module is specifically configured to encrypt the image passing through the quality screening and attribute information corresponding to the image through the symmetric encryption key to obtain the encrypted image; the attribute information comprises equipment parameters, uploading time, image acquisition position information and view angle directions; uploading the encrypted image to a distributed storage system for storage, and uploading an image address corresponding to the encrypted image to a blockchain.
Optionally, the apparatus further comprises:
the thermodynamic diagram module is used for generating an acquisition thermodynamic diagram corresponding to the target map in the blockchain; the acquired thermodynamic diagrams represent the acquired frequency and position of each region through different identifiers;
and the preset area determining module is used for determining a preset area in the target map according to the acquisition thermodynamic diagram.
Optionally, the preset area determining module is specifically configured to predict, according to a thermal value corresponding to each area in the acquired thermodynamic diagram, an estimated return value that may be obtained by the first user side performing image acquisition on each area; and determining a preset area in the target map based on the estimated return value.
Optionally, the apparatus further comprises:
the return value module is used for determining a data return value corresponding to the image according to the quality of the image, the thermal value corresponding to the preset area and the attribute information corresponding to the image; and feeding the data return value back to the first user terminal.
Optionally, the apparatus further comprises:
the request determining module is used for obtaining interaction information corresponding to the target map from the blockchain through the second user side and determining the target area which is missing or needs to be updated in the target map; determining at least one coordinate point in the target map as a coordinate point to be requested by combining the corresponding view angle direction during image acquisition based on all coordinate information corresponding to the target area; and determining the acquisition request based on the coordinate point to be requested.
According to still another aspect of the embodiments of the present disclosure, there is provided an electronic device including:
a memory for storing a computer program product;
a processor, configured to execute the computer program product stored in the memory, and when the computer program product is executed, implement the blockchain-based map processing method according to any of the embodiments.
According to yet another aspect of the disclosed embodiments, there is provided a computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the blockchain-based map processing method of any of the above embodiments.
The embodiment of the disclosure provides a map processing method, device, electronic equipment and medium based on blockchain, which comprises the following steps: collecting images of a preset area through a plurality of first user ends; the first user side comprises at least one image acquisition device, and the preset area is determined according to at least one area included in the target map; encrypting the image through a symmetric encryption key, uploading the encrypted image obtained by encryption to a distributed storage system for storage, and uploading an image address corresponding to the encrypted image to a blockchain; the block chain determines an image address corresponding to the acquisition request according to the received acquisition request of the second user side; the acquisition request is determined according to a target area which is missing or needs to be updated in the target map; obtaining the encrypted image corresponding to the image address from the distributed storage system based on the image address; decrypting the encrypted image to obtain an image corresponding to the acquisition request, and updating or complementing the target map based on the image; the data collected by different users are ensured to be mastered independently through a block chain decentralization mode, namely, the collected data are owned by the users and are not monopoly by large enterprises; and acquiring images which complement or update the target map through a plurality of first user terminals, so as to realize the construction of a scene by a multi-source multi-view large scene reconstruction technology.
The technical scheme of the present disclosure is described in further detail below through the accompanying drawings and examples.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.
The disclosure may be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a flow diagram of a blockchain-based map processing method provided by an exemplary embodiment of the present disclosure;
FIG. 2 is a schematic flow diagram of step 110 in the embodiment of FIG. 1 of the present disclosure;
FIG. 3 is a schematic illustration of an alternative acquisition thermodynamic diagram provided by an exemplary embodiment of the present disclosure;
FIG. 4 is a schematic diagram of a tree structure in an alternative example provided by an exemplary embodiment of the present disclosure;
FIG. 5 is a schematic view of at least one point view direction within a frame selection range in an alternative example provided by an exemplary embodiment of the present disclosure;
FIG. 6 is a schematic diagram of a blockchain-based map processing device provided by an exemplary embodiment of the present disclosure;
fig. 7 is a block diagram of an electronic device according to an embodiment of the present disclosure.
Detailed Description
Hereinafter, example embodiments according to the present disclosure will be described in detail with reference to the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present disclosure and not all of the embodiments of the present disclosure, and that the present disclosure is not limited by the example embodiments described herein.
It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless it is specifically stated otherwise.
It will be appreciated by those of skill in the art that the terms "first," "second," etc. in embodiments of the present disclosure are used merely to distinguish between different steps, devices or modules, etc., and do not represent any particular technical meaning nor necessarily logical order between them.
It should also be understood that in embodiments of the present disclosure, "plurality" may refer to two or more, and "at least one" may refer to one, two or more.
It should also be appreciated that any component, data, or structure referred to in the presently disclosed embodiments may be generally understood as one or more without explicit limitation or the contrary in the context.
In addition, the term "and/or" in this disclosure is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" in the present disclosure generally indicates that the front and rear association objects are an or relationship. The data referred to in this disclosure may include unstructured data, such as text, images, video, and the like, as well as structured data.
It should also be understood that the description of the various embodiments of the present disclosure emphasizes the differences between the various embodiments, and that the same or similar features may be referred to each other, and for brevity, will not be described in detail.
Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
Embodiments of the present disclosure may be applicable to electronic devices such as terminal devices, computer systems, servers, etc., which may operate with numerous other general purpose or special purpose computing system environments or configurations. Examples of well known terminal devices, computing systems, environments, and/or configurations that may be suitable for use with the terminal device, computer system, server, or other electronic device include, but are not limited to: personal computer systems, server computer systems, thin clients, thick clients, hand-held or laptop devices, microprocessor-based systems, set-top boxes, programmable consumer electronics, network personal computers, minicomputer systems, mainframe computer systems, and distributed cloud computing technology environments that include any of the above systems, and the like.
Electronic devices such as terminal devices, computer systems, servers, etc. may be described in the general context of computer system-executable instructions, such as program modules, being executed by a computer system. Generally, program modules may include routines, programs, objects, components, logic, data structures, etc., that perform particular tasks or implement particular abstract data types. The computer system/server may be implemented in a distributed cloud computing environment in which tasks are performed by remote processing devices that are linked through a communications network. In a distributed cloud computing environment, program modules may be located in both local and remote computing system storage media including memory storage devices.
Summary of the application
In implementing the present disclosure, the inventors found that from traditional three-dimensional map analysis, the cost of a method for constructing a three-dimensional point cloud based on a laser camera or a depth camera is too high, and that it is not feasible to reconstruct in a forest scene directly by using the existing conventional manner. In addition, according to recent studies, a laser depth camera calculates the time when a light beam is reflected because of its principle of emitting a plurality of laser beams, so that the emitted laser beams may injure eyes or other fragile organs of a human. Although the depth camera adopts a laser pulse scheme, if the scheme is popular, a visible laser generator at any place can cause certain damage to a human body. Finally, there is evidence that the laser emitted by the depth camera may affect the normal camera, and although the laser is invisible to the human eye, it may affect the imaging of the camera on the light sensing element, so that a certain interference may be generated on the device adopting the scheme of automatic driving, three-dimensional reconstruction and the like by the camera, and the hidden risks of daily production and life are increased.
Different from the mode that large companies such as google and hundred degrees directly use a plurality of laser scanning cameras and scan urban three-dimensional scene data through automobiles as carrying platforms, the industrial, forestry and environment scenes are complex and various, multiple shielding exists among different trees, the method that the laser scanning is directly used is difficult to directly reconstruct high-quality three-dimensional data, the complete high-quality data is recovered, and sometimes more cost is required to carry out post-processing on the scanned data.
In addition, in some areas, such as suburbs, forests and the like, unlike urban scenes, no flat road surface exists, if a mobile equipment platform is required to carry a laser scanning camera for three-dimensional data collection, the cost is too high, and the efficiency is low. The forestry machinery equipment carrying platform needs to cope with various road surface conditions, such as hills, forests, wetlands, concave-convex road surfaces and the like, and single type equipment is difficult to cope with, and if the forest, the wetland, the concave-convex road surfaces and the like are encountered, the forest machinery equipment carrying platform is difficult to pass through. Sometimes, some pavement may be trapped, manual assistance is needed or the pavement is directly scrapped, and the data acquisition cost is further increased. Therefore, the carrying platform has weak universality, robustness and safety, and is difficult to overcome the task of carrying the laser scanner.
Exemplary method
Fig. 1 is a flowchart illustrating a blockchain-based map processing method according to an exemplary embodiment of the present disclosure. The embodiment can be applied to an electronic device, as shown in fig. 1, and includes the following steps:
step 102, acquiring images of a preset area through a plurality of first user terminals.
The first user side comprises at least one image acquisition device, and the preset area is determined according to at least one area included in the target map.
In this embodiment, the first user side is a data provider, and may be any terminal device capable of implementing image acquisition, for example, a camera, a video camera, a laser scanner, and the like; collecting two-dimensional scene pictures through a plurality of different data sources by a plurality of first user terminals; each first user end can correspond to one first user, the first user can be a worker, a traveler, an industrial robot and the like, and the image acquisition can be carried out through the corresponding first user end when the worker works, the industrial robot works and the travel seeker plays.
And 104, encrypting the image by using the symmetric encryption key, uploading the encrypted image obtained by encryption to a distributed storage system for storage, and uploading an image address corresponding to the encrypted image to a blockchain.
In one embodiment, in order to satisfy the encrypted sharing of the data (image) uploaded by the first user, that is, before the second user requests the data, it is not known what the data uploaded by the data is. This requires that the data exposed on the blockchain and public network be encrypted. The data is opened to the data requester only when the second client satisfies the conditions in the other intelligent contracts.
And step 106, the blockchain determines an image address corresponding to the acquisition request according to the received acquisition request of the second user side.
The acquisition request is determined according to a target area which is missing or needs to be updated in the target map.
In this embodiment, the second client may be a data request end, a vendor, or a metauniverse vendor, etc., and the second client may obtain the corresponding image address from the blockchain instead of the image itself.
Step 108, obtaining the encrypted image corresponding to the image address from the distributed storage system based on the image address.
Optionally, because the blockchain has limited processing power, the number of transactions processed per unit time is limited, a certain amount of computing power is consumed to perform each transaction, and the storage capacity of each node is limited, which is not practical when uploading data directly to the blockchain. The scheme adopts a storage scheme combining the upper chain and the lower chain, wherein the block chain only stores metadata information, address information and key information of data, and actual and real data is stored in a distributed storage system, for example, an interstellar file system IPFS, which is a network transmission protocol aiming at realizing the distributed storage, sharing and persistence of files, is a content addressable peer-to-peer hypermedia distribution protocol; nodes in the IPFS network form a distributed file system, which is an open source item. Compared with traditional centralized storage schemes such as cloud, data center and the like, the IPFS has stronger decentralization attribute and is independent of third party management.
And 110, decrypting the encrypted image to obtain an image corresponding to the acquisition request, and updating or complementing the target map based on the image.
According to the map processing method based on the blockchain, provided by the embodiment of the disclosure, images of a preset area are collected through a plurality of first user ends; the first user side comprises at least one image acquisition device, and the preset area is determined according to at least one area included in the target map; encrypting the image through a symmetric encryption key, uploading the encrypted image obtained by encryption to a distributed storage system for storage, and uploading an image address corresponding to the encrypted image to a blockchain; the block chain determines an image address corresponding to the acquisition request according to the received acquisition request of the second user side; the acquisition request is determined according to a target area which is missing or needs to be updated in the target map; obtaining the encrypted image corresponding to the image address from the distributed storage system based on the image address; decrypting the encrypted image to obtain an image corresponding to the acquisition request, and updating or complementing the target map based on the image; the data collected by different users are ensured to be mastered independently through a block chain decentralization mode, namely, the collected data are owned by the users and are not monopoly by large enterprises; and acquiring images which complement or update the target map through a plurality of first user terminals, so as to realize the construction of a scene by a multi-source multi-view large scene reconstruction technology.
In some alternative embodiments, prior to step 106, it may further include:
the block chain receives a registration request of a second user terminal and generates a pair of public key and private key according to the registration request;
and sending the public key and the private key to the second user side.
Optionally, in this embodiment, the registration request is received through the block link, a pair of public key and private key is allocated to each second user, and the second user decrypts the received encrypted ciphertext based on the public key and the private key.
As shown in fig. 2, step 110 may include the following steps, based on the embodiment shown in fig. 1, described above:
in step 1101, the second client uploads the public key to the blockchain via the smart contract, and sends the public key to the first client via the blockchain.
Optionally, the second client may send the public key pkb to the blockchain through the data request, and transmit the public key pkb to at least one first client corresponding to the target map based on the interaction condition corresponding to the target map.
In step 1102, the first user side generates a conversion key based on the public key through a conversion key generation algorithm.
Optionally, after the first user terminal receives the public key pkb, the first user terminal generates the conversion key through a conversion key generation algorithm, for example, the conversion key generation method includes: rka→b=rekeygen (par, ska, pkb), rka is a conversion key, rekeygen represents a re-encryption algorithm, par is a conditional value, pkb is a public key of the first user side, ska represents a key algorithm, and uploading to the blockchain.
In step 1103, the condition value corresponding to the conversion key is matched with the condition value corresponding to the symmetric encryption key of the first user terminal through the blockchain, and when the condition values are the same, the symmetric encryption key is re-encrypted by using the proxy re-encryption key, so as to obtain re-encryption information and transmit the re-encryption information to the second user terminal.
Optionally, when the first user side encrypts the image through the symmetric encryption key, a condition value can be added for limiting the conversion of the block chain to the ciphertext; after the first user terminal receives the public key, the process of encrypting the symmetric encryption key based on the received public key may be fk-enc=enc (pka, fk, par), where fk is the symmetric encryption key; enc is an abbreviation of Encryption, which refers to Encryption technology, which is a data security technology that can convert plaintext into ciphertext; par is a condition value; pka is the public key of the first user side. The symmetric encryption key is re-encrypted by using the proxy re-encryption key, for example, the blockchain smart contract re-encrypts the symmetric encryption key kf-enc stored in the blockchain and encrypted by the public key by using the proxy re-encryption key rka-b to obtain re-encryption information fkt-enc=renc (par, rka-b, fk-enc), wherein par is a conditional value, rka-b is the proxy re-encryption key, renc is the proxy re-encryption key, kf-enc is the symmetric encryption key encrypted by the public key, and the obtained re-encryption information fkt-enc is sent to the second user terminal.
In step 1104, the second user end decrypts the re-encrypted information through the private key to obtain a symmetric encryption key, decrypts the encrypted image based on the symmetric encryption key to obtain an image corresponding to the acquisition request, and updates or completes the image to the target map.
Optionally, since the private key corresponds to the public key, the second user end decrypts the converted re-encrypted information by using the private key, and obtains the symmetric encryption key fk. And finally, decrypting the data acquired based on the image address uri by using the symmetric encryption key to acquire the image corresponding to the acquisition request. The embodiment adopts the proxy re-encryption technology to encrypt and share the data, so that any participant information and the information of the data to be shared are not exposed.
In some alternative embodiments, before step 104, the method may further include:
performing quality screening on the image to obtain an image passing the quality screening;
step 104 may then comprise:
encrypting the image passing through the quality screening and the attribute information corresponding to the image through the symmetric encryption key to obtain an encrypted image; the attribute information comprises equipment parameters, uploading time, image acquisition position information, view angle directions and the like; alternatively, the viewing angle direction may be determined based on normal vector coordinates.
Uploading the encrypted image to a distributed storage system for storage, and uploading an image address corresponding to the encrypted image to a blockchain.
Optionally, the first user end needs to perform preliminary screening on the acquired image, and filters out unavailable data (such as blurred or unclear images) by using an algorithm deployed locally; after taking a picture of a coordinate point, the data to be uploaded and shared comprisesImages are the images taken (n images are shared at a time),，/>representing camera internal parameters, time representing image upload time,/->Longitude, latitude and altitude representing photographing position, < >>Representing normal vector coordinates, based on which the viewing angle direction can be determined. The encryption process comprises the following steps: and encrypting and uploading the data D to a distributed storage system through the symmetric key fk to obtain an index address uri of the data D in the distributed storage system.
Optionally, before performing step 102, the method may further include:
generating an acquisition thermodynamic diagram of a corresponding target map in a blockchain; the acquired thermodynamic diagrams represent the acquired frequency and position of each region through different identifiers;
and determining a preset area in the target map according to the acquisition thermodynamic diagram.
In this embodiment, a decentralised application (Dapp, i.e. a neutral application owned by a non-single party running on the chain) is deployed on the blockchain infrastructure to generate a data acquisition thermodynamic diagram that reflects in real time the frequency and location at which data is acquired, to guide the user in more reasonable acquisition of two-dimensional image data. Meanwhile, the incentive mechanism of the return obtained by the user can be dynamically adjusted according to the data reflected by the current thermodynamic map (for example, higher return can be obtained for the collection of the area with low collection frequency, etc.). And the three-dimensional map service provider (corresponding to the second user end) purchases the stored or indexed data, and builds the scene by relying on the multi-source multi-view large scene reconstruction technology. The second user side can provide various services using the three-dimensional map. For example, in one alternative example, as shown in FIG. 3, the acquisition thermodynamic diagram is a map drawn reflecting the frequency and total number of image acquisitions of a map region. Color filling (or filling of different gray scales) is performed according to the position data of different areas, so that different distributions of the acquired images of the users in the respective areas are reflected. Since the drawing of the acquisition thermodynamic diagram requires access to the transaction data (metadata information metadata) on the blockchain, the application of the acquisition thermodynamic diagram is a kind of decentralizing application, which is applied to the first user side and the second user side simultaneously. For the first user terminal, the acquisition thermodynamic diagram is used for guiding the position acquired by the first user terminal, rough price return calculation is provided, and the whole condition information in the ecological system is conveniently known. For the second user side, the acquired thermodynamic diagram can be used for observing and evaluating the relatively mature region acquired in the system and guiding the reconstruction of the three-dimensional scene map of the appointed region by acquiring pictures.
Optionally, determining the preset area in the target map according to the acquired thermodynamic diagram includes:
estimating an estimated return value obtained by the first user side for image acquisition of each region according to the thermodynamic value corresponding to each region in the acquired thermodynamic diagram;
and determining a preset area in the target map based on the predicted return value.
Optionally, the map may be drawn by expressing the frequency of region image acquisition and the total number of times in the thermodynamic diagram by using different thermodynamic values, for example, a higher thermodynamic value indicates a higher acquisition number, a lower thermodynamic value indicates a lower acquisition number, for a region with a higher acquisition number, a corresponding estimated return value is lower, and for a region with a lower acquisition number, a corresponding estimated return value is higher; in this embodiment, an area with a lower collected thermal value (e.g., a thermal value smaller than a preset value) may be determined as a preset area according to the collected thermodynamic diagram, so as to promote the return of the first user terminal.
In some alternative embodiments, it may further include:
determining a data return value corresponding to the image according to the quality of the image, a thermal value corresponding to a preset area and attribute information corresponding to the image;
and feeding back the data return value to the first user terminal.
The uploading and requesting of the data have respective excitation mechanisms, but the overall thought is based on the scoring of the data, namely, the thermodynamic value corresponding to the thermodynamic map of the coordinate point, the data quality, the complete value of the parameter and the like are determined together. For example, one alternative incentive strategy is as follows:
data uploader uploads data to get returnCorresponding point heat value +.>Data quality (360 p is 2 min, 720p is 5 min, 1080p is 8 min, 4k is 10 min)/(2 min)>The data completeness (item in metadata is necessary to select, the value is 1. One more data item is added by one minute, such as the occupied space size, length and width, semantic meaning of the picture, and the like).
Wherein, the liquid crystal display device comprises a liquid crystal display device,、/>、/>the weight values are respectively corresponding weight values, and the weight values can be set according to actual application scenes.
The above equation lists one possible incentive strategy, and may also be used to discount the transaction returns that the data uploader uploads data (the better the data-based score, the greater the discount). The incentive strategy of the data requester is the same.
In some alternative embodiments, prior to step 106, it may further include:
the second user side obtains interaction information corresponding to the target map from the block chain, and determines a target area which is missing or needs to be updated in the target map;
Determining at least one coordinate point in the target map as a coordinate point to be requested by combining the corresponding view angle direction during image acquisition based on all coordinate information corresponding to the target area;
and determining an acquisition request based on the coordinate point to be requested.
In this embodiment, the determination of the target area may be determined by searching, that is, the second user side searches for the interactive information on the blockchain, so as to obtain the required image data for the three-dimensional scene map. In this embodiment, the query method adopted by the user may be frame selection, that is, the region to be reconstructed is selected by frame selection in the map, so as to retrieve the data of the specified location. Since the amount of acquired data possible is considered to be very large, a quick retrieval mechanism for the coordinate data is required. For example, a tree structure based on three-dimensional coordinate values is maintained in blockchain nodes or in a local database, so that all points within a specified frame selection range, such asEtc.
FIG. 4 is a schematic diagram of a tree structure in an alternative example. As shown in FIG. 4, an octree is shown, with the root node (x,And z represents the root node in the x-axis,/-respectively>Coordinates of axis and z axis), i.e. the first input point, the eight sub-nodes below are respectively x,/-respectively >Points of z-size and small (e.g., (large, small, large) nodes connected to the root node in FIG. 4 represent x-axis coordinates larger than the root node, +.>The axis coordinate is smaller than the root node and the z-axis coordinate is greater than the node of the root node), and the newly inserted point does the same operation again. And finally, performing balance operation, reducing the depth, minimizing the complexity of searching, and comparing the depths of each layer during searching. It is not enough to merely search for location points within a box selection area, and it is also necessary to screen the selected view angle. For example, the selected point is in the region, but the view is outward, nor is it equal to helping in three-dimensional reconstruction, e.g., point C as shown in FIG. 5. It is desirable that the angle between the position vector and the direction vector is less than 90 degrees. Meanwhile, a point in the region is related to the distance from the center point of the box selection region, and the relative size of the distance is related to the size of the box selection region. The definition screening formula may thus be as shown in the following formula (1):
；
wherein, the liquid crystal display device comprises a liquid crystal display device,selecting a region diagonal distance for the framed region; />And->The upper and lower thresholds are respectively larger than 0; />Selecting points in a region for a frame to be judged; />A normal vector coordinate for the point; />Coordinates of the center point of the area are selected for the box. The second user side firstly searches the data on the blockchain so as to find the data of the needed coordinate point.
Any of the blockchain-based map processing methods provided by the embodiments of the present disclosure may be performed by any suitable device having data processing capabilities, including, but not limited to: terminal equipment, servers, etc. Alternatively, any of the blockchain-based map processing methods provided by the embodiments of the present disclosure may be executed by a processor, such as the processor executing any of the blockchain-based map processing methods mentioned by the embodiments of the present disclosure by invoking corresponding instructions stored in a memory. And will not be described in detail below.
Exemplary apparatus
Fig. 6 is a schematic structural diagram of a blockchain-based map processing device provided in an exemplary embodiment of the present disclosure. As shown in fig. 6, the apparatus provided in this embodiment may include:
the image acquisition module 61 is configured to acquire images of a preset area through a plurality of first user terminals.
The first user side comprises at least one image acquisition device, and the preset area is determined according to at least one area included in the target map.
The image uploading module 62 is configured to encrypt an image with a symmetric encryption key, upload the encrypted image obtained by the encryption to the distributed storage system for storage, and upload an image address corresponding to the encrypted image to the blockchain.
The address obtaining module 63 is configured to determine, according to the received obtaining request from the second user terminal, an image address corresponding to the obtaining request through the blockchain.
The acquisition request is determined according to a target area which is missing or needs to be updated in the target map.
The image acquisition module 64 is configured to obtain an encrypted image corresponding to the image address from the distributed storage system based on the image address.
The map processing module 65 is configured to decrypt the encrypted image to obtain an image corresponding to the acquisition request, and update or complement the target map based on the image.
The map processing device based on the blockchain provided by the embodiment of the disclosure acquires images of a preset area through a plurality of first user terminals; the first user side comprises at least one image acquisition device, and the preset area is determined according to at least one area included in the target map; encrypting the image through a symmetric encryption key, uploading the encrypted image obtained by encryption to a distributed storage system for storage, and uploading an image address corresponding to the encrypted image to a blockchain; the block chain determines an image address corresponding to the acquisition request according to the received acquisition request of the second user side; the acquisition request is determined according to a target area which is missing or needs to be updated in the target map; obtaining the encrypted image corresponding to the image address from the distributed storage system based on the image address; decrypting the encrypted image to obtain an image corresponding to the acquisition request, and updating or complementing the target map based on the image; the data collected by different users are ensured to be mastered independently through a block chain decentralization mode, namely, the collected data are owned by the users; and acquiring images which complement or update the target map through a plurality of first user terminals, so as to realize the construction of a scene by a multi-source multi-view large scene reconstruction technology.
Optionally, the apparatus provided in this embodiment may further include:
the registration module is used for receiving a registration request of the second user terminal by the blockchain and generating a pair of public key and private key according to the registration request; and sending the public key and the private key to the second user side.
Optionally, the map processing module 65 is specifically configured to upload the public key to the blockchain through the smart contract by the second user terminal, and send the public key to the first user terminal through the blockchain; the first user side generates a conversion key based on the public key through a conversion key generation algorithm; matching the condition value corresponding to the conversion key with the condition value corresponding to the symmetric encryption key of the first user terminal through the blockchain, and re-encrypting the symmetric encryption key by using the proxy re-encryption key when the condition values are the same, so as to obtain re-encryption information and transmitting the re-encryption information to the second user terminal; the second user end decrypts the re-encrypted information through the private key to obtain a symmetric encryption key, decrypts the encrypted image based on the symmetric encryption key to obtain an image corresponding to the acquisition request, and updates or completes the image to the target map.
Optionally, the apparatus provided in this embodiment may further include:
the quality screening module is used for carrying out quality screening on the images to obtain images passing the quality screening;
The image uploading module 62 is specifically configured to encrypt the image passing through the quality screening and the attribute information corresponding to the image by using a symmetric encryption key, so as to obtain an encrypted image; the attribute information comprises equipment parameters, uploading time, image acquisition position information and view angle directions; uploading the encrypted image to a distributed storage system for storage, and uploading an image address corresponding to the encrypted image to a blockchain.
Optionally, the apparatus provided in this embodiment may further include:
the thermodynamic diagram module is used for generating an acquisition thermodynamic diagram of a corresponding target map in the block chain; the acquired thermodynamic diagrams represent the acquired frequency and position of each region through different identifiers;
the preset area determining module is used for determining a preset area in the target map according to the acquisition thermodynamic diagram.
Optionally, the preset area determining module is specifically configured to estimate, according to a thermodynamic value corresponding to each area in the acquired thermodynamic diagram, an estimated return value that may be obtained by the first user side performing image acquisition on each area; and determining a preset area in the target map based on the predicted return value.
Optionally, the apparatus provided in this embodiment may further include:
the return value module is used for determining a data return value corresponding to the image according to the quality of the image, the thermal value corresponding to the preset area and the attribute information corresponding to the image; and feeding back the data return value to the first user terminal.
Optionally, the apparatus provided in this embodiment may further include:
the request determining module is used for obtaining interaction information corresponding to the target map from the blockchain through the second user side and determining a target area which is missing or needs to be updated in the target map; determining at least one coordinate point in the target map as a coordinate point to be requested by combining the corresponding view angle direction during image acquisition based on all coordinate information corresponding to the target area; and determining an acquisition request based on the coordinate point to be requested.
Exemplary electronic device
Next, an electronic device according to an embodiment of the present disclosure is described with reference to fig. 7. The electronic device may be either or both of the first device and the second device, or a stand-alone device independent thereof, which may communicate with the first device and the second device to receive the acquired input signals therefrom.
Fig. 7 is a block diagram of an electronic device according to an embodiment of the present disclosure.
As shown in fig. 7, the electronic device includes one or more processors and memory.
The processor may be a Central Processing Unit (CPU) or other form of processing unit having data processing and/or instruction execution capabilities, and may control other components in the electronic device to perform the desired functions.
The memory may store one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and/or nonvolatile memory. The volatile memory may include, for example, random Access Memory (RAM) and/or cache memory (cache), and the like. The non-volatile memory may include, for example, read Only Memory (ROM), hard disk, flash memory, and the like. One or more computer program products may be stored on the computer readable storage medium that can be run by a processor to implement the blockchain-based map processing methods and/or other desired functions of the various embodiments of the present disclosure as described above.
In one example, the electronic device may further include: input devices and output devices, which are interconnected by a bus system and/or other forms of connection mechanisms (not shown).
In addition, the input device may include, for example, a keyboard, a mouse, and the like.
The output device may output various information including the determined distance information, direction information, etc., to the outside. The output device may include, for example, a display, speakers, a printer, and a communication network and remote output devices connected thereto, etc.
Of course, only some of the components of the electronic device relevant to the present disclosure are shown in fig. 7 for simplicity, components such as buses, input/output interfaces, and the like being omitted. In addition, the electronic device may include any other suitable components depending on the particular application.
In addition to the methods and apparatus described above, embodiments of the present disclosure may also be a computer program product comprising computer program instructions which, when executed by a processor, cause the processor to perform the steps in the blockchain-based map processing method described in the above section of the present disclosure according to various embodiments of the present disclosure.
The computer program product may write program code for performing the operations of embodiments of the present disclosure in any combination of one or more programming languages, including an object oriented programming language such as Java, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device, partly on a remote computing device, or entirely on the remote computing device or server.
Further, embodiments of the present disclosure may also be a computer-readable storage medium having stored thereon computer program instructions that, when executed by a processor, cause the processor to perform steps in a blockchain-based map processing method according to various embodiments of the present disclosure described in the above section of the present disclosure.
The computer readable storage medium may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may include, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium would include the following: an electrical connection having one or more wires, a portable disk, a hard disk, random Access Memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
The basic principles of the present disclosure have been described above in connection with specific embodiments, however, it should be noted that the advantages, benefits, effects, etc. mentioned in the present disclosure are merely examples and not limiting, and these advantages, benefits, effects, etc. are not to be considered as necessarily possessed by the various embodiments of the present disclosure. Furthermore, the specific details disclosed herein are for purposes of illustration and understanding only, and are not intended to be limiting, since the disclosure is not necessarily limited to practice with the specific details described.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different manner from other embodiments, so that the same or similar parts between the embodiments are mutually referred to. For system embodiments, the description is relatively simple as it essentially corresponds to method embodiments, and reference should be made to the description of method embodiments for relevant points.
The block diagrams of the devices, apparatuses, devices, systems referred to in this disclosure are merely illustrative examples and are not intended to require or imply that the connections, arrangements, configurations must be made in the manner shown in the block diagrams. As will be appreciated by one of skill in the art, the devices, apparatuses, devices, systems may be connected, arranged, configured in any manner. Words such as "including," "comprising," "having," and the like are words of openness and mean "including but not limited to," and are used interchangeably therewith. The terms "or" and "as used herein refer to and are used interchangeably with the term" and/or "unless the context clearly indicates otherwise. The term "such as" as used herein refers to, and is used interchangeably with, the phrase "such as, but not limited to.
The methods and apparatus of the present disclosure may be implemented in a number of ways. For example, the methods and apparatus of the present disclosure may be implemented by software, hardware, firmware, or any combination of software, hardware, firmware. The above-described sequence of steps for the method is for illustration only, and the steps of the method of the present disclosure are not limited to the sequence specifically described above unless specifically stated otherwise. Furthermore, in some embodiments, the present disclosure may also be implemented as programs recorded in a recording medium, the programs including machine-readable instructions for implementing the methods according to the present disclosure. Thus, the present disclosure also covers a recording medium storing a program for executing the method according to the present disclosure.
It is also noted that in the apparatus, devices and methods of the present disclosure, components or steps may be disassembled and/or assembled. Such decomposition and/or recombination should be considered equivalent to the present disclosure.
The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the disclosure. Thus, the present disclosure is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of the disclosure to the form disclosed herein. Although a number of example aspects and embodiments have been discussed above, a person of ordinary skill in the art will recognize certain variations, modifications, alterations, additions, and subcombinations thereof.
Claims (11)
1. A blockchain-based map processing method, comprising:
collecting images of a preset area through a plurality of first user ends; the first user side comprises at least one image acquisition device, and the preset area is determined according to at least one area included in the target map;
encrypting the image through a symmetric encryption key, uploading the encrypted image obtained by encryption to a distributed storage system for storage, and uploading an image address corresponding to the encrypted image to a blockchain;
the block chain determines an image address corresponding to the acquisition request according to the received acquisition request of the second user side; the acquisition request is determined according to a target area which is missing or needs to be updated in the target map;
obtaining the encrypted image corresponding to the image address from the distributed storage system based on the image address;
And decrypting the encrypted image to obtain an image corresponding to the acquisition request, and updating or complementing the target map based on the image.
2. The method of claim 1, wherein before the blockchain determines the image address corresponding to the acquisition request according to the received acquisition request of the second user side, the method further comprises:
the blockchain receives a registration request of the second user terminal and generates a pair of public key and private key according to the registration request;
and sending the public key and the private key to the second user side.
3. The method according to claim 2, wherein decrypting the encrypted image to obtain the image corresponding to the acquisition request, updating or complementing the target map based on the image, comprises:
the second user side uploads the public key to the blockchain through an intelligent contract, and the public key is sent to the first user side through the blockchain;
the first user side generates a conversion key based on the public key through a conversion key generation algorithm;
matching a condition value corresponding to the conversion key with a condition value corresponding to a symmetric encryption key of the first user side through the blockchain, and re-encrypting the symmetric encryption key by using a proxy re-encryption key when the condition values are the same to obtain re-encryption information and transmitting the re-encryption information to the second user side;
The second user end decrypts the re-encrypted information through the private key to obtain the symmetric encryption key, decrypts the encrypted image based on the symmetric encryption key to obtain an image corresponding to the acquisition request, and updates or completes the image to the target map.
4. The method according to claim 1, wherein the encrypting the image by the symmetric encryption key, uploading the encrypted image obtained by the encrypting to a distributed storage system for storage, and uploading the image address corresponding to the encrypted image to a blockchain, further comprises:
performing quality screening on the image to obtain an image passing the quality screening;
the encrypting the image by the symmetric encryption key, uploading the encrypted image obtained by encryption to a distributed storage system for storage, and uploading the image address corresponding to the encrypted image to a blockchain, comprising:
encrypting the image passing through the quality screening and attribute information corresponding to the image through the symmetric encryption key to obtain the encrypted image; the attribute information comprises equipment parameters, uploading time, image acquisition position information and view angle directions;
Uploading the encrypted image to a distributed storage system for storage, and uploading an image address corresponding to the encrypted image to a blockchain.
5. The method according to any one of claims 1-4, wherein before the capturing the images of the predetermined area by the plurality of first clients, further comprises:
generating an acquisition thermodynamic diagram corresponding to the target map in the blockchain; the acquired thermodynamic diagrams represent the acquired frequency and position of each region through different identifiers;
and determining a preset area in the target map according to the acquisition thermodynamic diagram.
6. The method of claim 5, wherein determining the predetermined area in the target map from the acquisition thermodynamic diagram comprises:
estimating an estimated return value obtained by the first user side for image acquisition of each region according to the thermodynamic value corresponding to each region in the acquired thermodynamic diagram;
and determining a preset area in the target map based on the estimated return value.
7. The method of any one of claims 1-4, further comprising:
determining a data return value corresponding to the image according to the quality of the image, the thermal value corresponding to the preset area and the attribute information corresponding to the image;
And feeding the data return value back to the first user terminal.
8. The method according to any one of claims 1-4, wherein before the blockchain determines the image address corresponding to the acquisition request according to the received acquisition request of the second user side, the method further includes:
the second user side obtains interaction information corresponding to the target map from the blockchain, and determines the target area which is missing or needs to be updated in the target map;
determining at least one coordinate point in the target map as a coordinate point to be requested by combining the corresponding view angle direction during image acquisition based on all coordinate information corresponding to the target area;
and determining the acquisition request based on the coordinate point to be requested.
9. A blockchain-based map processing device, comprising:
the image acquisition module is used for acquiring images of a preset area through a plurality of first user ends; the first user side comprises at least one image acquisition device, and the preset area is determined according to at least one area included in the target map;
the image uploading module is used for encrypting the image through a symmetric encryption key, uploading the encrypted image obtained by encryption to a distributed storage system for storage, and uploading an image address corresponding to the encrypted image to a block chain;
The address acquisition module is used for determining an image address corresponding to the acquisition request according to the received acquisition request of the second user terminal through the blockchain; the acquisition request is determined according to a target area which is missing or needs to be updated in the target map;
an image acquisition module, configured to obtain, from the distributed storage system, the encrypted image corresponding to the image address based on the image address;
and the map processing module is used for decrypting the encrypted image to obtain an image corresponding to the acquisition request, and updating or complementing the target map based on the image.
10. An electronic device, comprising:
a memory for storing a computer program product;
a processor for executing the computer program product stored in the memory and when executed implementing the blockchain-based map processing method of any of the preceding claims 1-8.
11. A computer readable storage medium having stored thereon computer program instructions, which when executed by a processor, implement the blockchain-based map processing method of any of the preceding claims 1-8.
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| CN117557241B (en) * | 2024-01-11 | 2024-05-31 | 中国信息通信研究院 | Data processing method, device, equipment and medium based on distributed network |
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| CN117557241A (en) * | 2024-01-11 | 2024-02-13 | 中国信息通信研究院 | Data processing method, device, equipment and medium based on distributed network |
| CN117557241B (en) * | 2024-01-11 | 2024-05-31 | 中国信息通信研究院 | Data processing method, device, equipment and medium based on distributed network |
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