CN117453760A

CN117453760A - Retrieval method and system for digital collection on blockchain, device and electronic equipment

Info

Publication number: CN117453760A
Application number: CN202210852018.9A
Authority: CN
Inventors: 黄桂鸿
Original assignee: Tenpay Payment Technology Co Ltd
Current assignee: Tenpay Payment Technology Co Ltd
Priority date: 2022-07-19
Filing date: 2022-07-19
Publication date: 2024-01-26

Abstract

The embodiment of the application discloses a retrieval method, a retrieval system, a retrieval device and electronic equipment for digital collections on a blockchain. The method comprises the following steps: receiving collection guide information sent by the client for searching digital collections; extracting feature data corresponding to the collection guide information, and inquiring pre-stored collection features matched with the feature data, wherein the pre-stored collection features comprise feature data obtained by feature extraction of the linked digital collection in advance; and after acquiring the on-chain credential information stored in association with the pre-stored collection characteristics, returning query result data to the client so as to carry out retrieval response of the corresponding digital collection according to the query result data at the client. According to the method and the device, more convenient digital collection retrieval is realized by extracting the feature data of collection guide information and combining technical means such as feature extraction and matching.

Description

Retrieval method and system for digital collection on blockchain, device and electronic equipment

Technical Field

The application relates to the technical field of blockchains, in particular to a method, a system, a device and electronic equipment for searching digital collection on a blockchain.

Background

A digital collection is understood to be a piece of digital content, e.g., any artwork or merchandise, that has been digitally encrypted, and then has a unique "digital certificate," which is known as a digital collection. And storing the digital collection on the blockchain based on the blockchain technology, so that the digital collection cannot be tampered and copied. Each digital collection has a unique blockchain number, which may be referred to as a unique identification on the chain of the digital collection.

Currently, user retrieval of a digital collection that has been uplinked is typically performed by either transaction hashing or other on-chain credentials to a browser or blockchain node, or by loading all of the data of the digital collection from the blockchain to a database, and retrieving from the database by collection keywords. The former retrieval mode is inconvenient for users to retrieve and use because credential information on a transaction hash chain is irregular, and the latter retrieval mode is complex to develop and occupies large storage resources. Therefore, how to determine a more convenient digital collection retrieval method is a technical problem to be solved urgently by those skilled in the art.

Disclosure of Invention

To solve the above technical problems, embodiments of the present application provide a method and apparatus for searching digital collections on a blockchain, a system, an electronic device, a computer readable storage medium, and a computer program product, respectively.

According to an aspect of the embodiments of the present application, there is provided a method for searching digital collection on a blockchain, the method being applied to a digital collection searching system, the system including a client, a searching server and a blockchain network, the digital collection being stored in the blockchain network, the method being performed by the searching server, including: receiving collection guide information sent by the client for searching digital collections; extracting feature data corresponding to the collection guide information, and inquiring pre-stored collection features matched with the feature data, wherein the pre-stored collection features comprise feature data obtained by feature extraction of the linked digital collection in advance; and after acquiring the on-chain credential information stored in association with the pre-stored collection characteristics, returning query result data to the client so as to carry out retrieval response of the corresponding digital collection according to the query result data at the client.

According to an aspect of the embodiments of the present application, there is provided a retrieval device for digital collection on a blockchain, the device being applied to a digital collection retrieval system, the system including a client, a retrieval server and a blockchain network, the digital collection being stored in the blockchain network, the device being configured in the retrieval server, including: the collection guide information receiving module is configured to receive collection guide information sent by the client and used for searching the digital collection; the pre-stored collection feature query module is configured to extract feature data corresponding to the collection guide information and query pre-stored collection features matched with the feature data, wherein the pre-stored collection features comprise feature data obtained by feature extraction of the linked digital collection in advance; and the query result feedback module is configured to return query result data to the client after acquiring the on-chain credential information stored in association with the pre-stored collection characteristics so as to perform retrieval response of the corresponding digital collection according to the query result data at the client.

According to an aspect of the embodiments of the present application, there is provided another method for searching digital collection on a blockchain, where the method is applied to a digital collection searching system, the system includes a client, a searching server, and a blockchain network, in which the digital collection is stored, and the method is performed by the client, and includes: sending collection guide information for searching digital collections to the search server; receiving query result data returned by the search server, wherein the query result data is characteristic data corresponding to the collection guide information extracted by the search server, inquiring pre-stored collection characteristics matched with the characteristic data, and returning the query result data after acquiring on-chain credential information stored in association with the pre-stored collection characteristics, wherein the pre-stored collection characteristics comprise characteristic data obtained by carrying out characteristic extraction on the digital collection on a chain in advance; and carrying out search response of the corresponding digital collection according to the search result data.

According to an aspect of the embodiments of the present application, there is provided a retrieval device of a digital collection on a blockchain, the device being applied to a digital collection retrieval system, the system including a client, a retrieval server, and a blockchain network in which the digital collection is stored, the device being configured in the client, including: the collection guide information sending module is configured to send collection guide information for searching the digital collection to the search server; the query result data receiving module is configured to receive query result data returned by the search server, wherein the query result data is characteristic data corresponding to the collection guide information extracted by the search server, and queries pre-stored collection characteristics matched with the characteristic data, and returns after acquiring on-chain credential information stored in association with the pre-stored collection characteristics, and the pre-stored collection characteristics comprise characteristic data obtained by carrying out characteristic extraction on digital collection on a chain in advance; and the search response module is configured to perform search response of the corresponding digital collection according to the search result data.

According to an aspect of the embodiments of the present application, there is provided a retrieval system for digital collection on a blockchain, including a terminal, a browser end, a cloud graphics library, and a blockchain network, wherein: the terminal is used for sending a digital collection retrieval request to the browser end, wherein the digital collection retrieval request contains collection guide information; the browser end forwards the collection guide information to the cloud image library; the cloud image library extracts feature data corresponding to the collection guide information, queries pre-stored collection features matched with the feature data, wherein the pre-stored collection features comprise feature data obtained by carrying out feature extraction on the digital collection on a chain in advance, and returns query result data to the browser after acquiring on-chain credential information stored in association with the pre-stored collection features; and the browser end performs search response of the corresponding digital collection according to the received query result data so as to enable the terminal to obtain uplink information of the corresponding digital collection, and performs search result display of the corresponding digital collection based on the collection guide information and the uplink information.

According to an aspect of an embodiment of the present application, there is provided an electronic device including: one or more processors; and the storage device is used for storing one or more programs, and when the one or more programs are executed by the one or more processors, the electronic equipment realizes the searching method of the digital collection on the blockchain.

According to one aspect of embodiments of the present application, there is provided a computer-readable storage medium having stored thereon computer-readable instructions which, when executed by a processor of a computer, cause the computer to perform a method of retrieving a digital collection on a blockchain as described above.

According to an aspect of the embodiments of the present application, there is also provided a computer program product comprising a computer program which, when executed by a processor, implements a method of retrieving a digital collection on a blockchain as described above.

According to the technical scheme provided by the embodiment of the application, after the collection guide information sent by the client side and used for searching the digital collection is received, the pre-stored collection characteristics matched with the characteristic data are inquired through extracting the characteristic data corresponding to the collection guide information, after the on-chain credential information stored in association with the pre-stored collection characteristics is acquired, query result data are returned to the client side, and therefore the browser can acquire the on-chain information of the corresponding digital collection according to the query result data.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. It is apparent that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.

FIG. 1 is a schematic diagram of a blockchain network in accordance with an exemplary embodiment;

FIG. 2 is a schematic diagram of a retrieval system for digital collections on a blockchain, as shown in an exemplary embodiment of the present application;

FIG. 3 is a schematic diagram of an exemplary user interaction interface provided by terminal 210 in the system of FIG. 2;

FIG. 4 is a schematic diagram of an interaction flow involved in the system of FIG. 2;

fig. 5 is an interface schematic diagram of a display of a search result of a corresponding digital collection based on uplink information in the terminal 210 in the system shown in fig. 2;

FIG. 6 is a schematic diagram of another blockchain-based retrieval system for digital collections based on the architecture of the system of FIG. 2;

FIG. 7 is a schematic flow chart of a service end 610 in the system shown in FIG. 6 initiating a digital collection upload;

FIG. 8 is a schematic flow chart of a service end 610 in the system shown in FIG. 6 initiating address transfer on a digital collection chain;

FIG. 9 is a flowchart illustrating a method of retrieving digital collections on a blockchain in accordance with an exemplary embodiment;

FIG. 10 is a schematic diagram of another blockchain-based retrieval system for digital collections based on the architecture of the system of FIG. 6;

FIG. 11 is a flowchart illustrating a method of retrieving digital collections on a blockchain, as shown in another exemplary embodiment;

FIG. 12 is a schematic diagram of an exemplary upload parameter specifying an upload interface;

FIG. 13 is a flowchart illustrating a method of retrieving digital collections on a blockchain, as shown in another exemplary embodiment;

FIG. 14 is a block diagram of a retrieval device for digital collections on a blockchain as contemplated by an exemplary embodiment of the present application;

FIG. 15 is a block diagram of a retrieval device for digital collections on a blockchain as enabled by another exemplary embodiment of the present application;

fig. 16 shows a schematic diagram of a computer system suitable for use in implementing the electronic device of the embodiments of the present application.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as detailed in the accompanying claims.

The block diagrams depicted in the figures are merely functional entities and do not necessarily correspond to physically separate entities. That is, the functional entities may be implemented in software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.

The flow diagrams depicted in the figures are exemplary only, and do not necessarily include all of the elements and operations/steps, nor must they be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the order of actual execution may be changed according to actual situations.

Reference to "a plurality" in this application means two or more than two. "and/or" describes an association relationship of an association object, meaning that there may be three relationships, e.g., a and/or B may represent: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.

First, embodiments of the present application relate to Blockchain (Blockchain) technology. The blockchain technology is a brand new distributed infrastructure and computing mode which uses a blockchain data structure to verify and store data, uses a distributed node consensus algorithm to generate and update data, uses a cryptography mode to ensure the safety of data transmission and access, and uses an intelligent contract consisting of automated script codes to program and operate the data. The blockchain refers to a set of basic framework which is decentralized and has the characteristic of distributed storage, in particular to a data structure which is formed by using a mode similar to a linked list for data blocks according to a time sequence, can safely store data which have a precedence relationship and can be verified in a system, and ensures that the data cannot be tampered or counterfeited in a cryptography mode. Briefly, blockchains are decentralized distributed ledgers, each chain corresponding to a separate ledger.

Fig. 1 is a schematic diagram of a blockchain network in accordance with an exemplary embodiment. The blockchain network 100 shown in fig. 1 may include node devices 10a, 10b, 10c, 10d. The node devices 10a, 10b, 10c, and 10d are each blockchain nodes (simply referred to as nodes) in the blockchain network 100 shown in fig. 1, and these nodes may be any form of computing device that accesses the blockchain network 100, such as a server, a user terminal, and so on. The node devices 10a, 10b, 10c, and 10d shown in fig. 1 may also be connected to form the blockchain network 100 by way of network communication.

The types of blockchains involved in the architecture of blockchain network 100 shown in fig. 1 may specifically include: public chain (Public Blockchain), private chain (Private Blockchain), and federated chain (Consortium blockchain), the types of blockchains employed in different blockchain application scenarios may vary, and are not limited herein. The public chain refers to a blockchain which can be externally disclosed and can be added and accessed by anyone; the blocks on the public chain can be checked by anyone, and the anyone can initiate the transaction on the public chain and can participate in the consensus process of the public chain at any time. The private chain can be used in private organization, and the read-write authority and participation accounting authority on the blockchain can be formulated according to the rules of the private organization; typically for data management, auditing, etc. within an enterprise. The alliance chain refers to the read-write authority of alliance members participating in the alliance chain on the blockchain, and the participation accounting authority can be formulated according to alliance rules; generally used in the context of transactions, settlements or clearing between institutions.

For each node in the blockchain network 100, there is a node identification corresponding thereto, and each node in the blockchain network 100 may store node identifications of other nodes in the blockchain network 100 for subsequent broadcasting of the generated blocks to other nodes in the blockchain network 100 based on the node identifications of the other nodes.

Each node in the blockchain network 100 stores one and the same blockchain (see blockchain 10e shown in fig. 1). The block chain is composed of a plurality of blocks, and each block forming the block chain comprises a hash value of a storage transaction record of the block (a hash value of the block) and a hash value of a previous block, and the blocks are connected through the hash values to form the block chain so as to ensure the safety of input information in the blocks. The block may also include information such as a time stamp, a version number, and a difficulty value at the time of block generation, which are not shown here.

Smart contracts (Smart contact) are a type of computer protocol that aims to propagate, verify or execute contracts in an informative manner, which allow trusted transactions to be made without third parties, which transactions are traceable and irreversible. The intelligent contract can execute the terms of a certain contract, is realized through codes which are deployed on a shared account book and are used for executing when certain conditions are met, is used for completing automatic transaction according to actual business demand codes, such as inquiring the logistics state of goods purchased by a buyer, and transfers electronic money of the buyer to the address of a merchant after the buyer signs the goods; of course, the smart contract is not limited to executing the contract for the transaction, and may execute a contract that processes the received information. In the blockchain network 100 shown in fig. 1, a smart contract may be deployed on each node in the blockchain network 100 to perform processing of the uplink of data, transfer of the uplink data, etc. by the protocol agreed upon by the smart contract.

The blockchain network 100 shown in fig. 1 may be specifically used for storing digital collections, as mentioned above, the digital collections are any artwork or commodity, which has a unique digital identity after being encrypted by digital means, so as to obtain the corresponding digital collections of any artwork or commodity, and thus the digital collections are also understood as a part of digital content. For example, the digital collection may be, for example, a picture content of an art or a commodity, a piece of audio content or video content, or a mixed content of a plurality of digital contents, which is not limited herein.

The casting person of the digital collection is usually the owner of the digital collection, and the casting person stores the digital collection on the blockchain, so that the digital collection cannot be tampered and copied, the storage safety of the digital collection is ensured, and the uplink information of the stored digital collection can be disclosed, for example, the information can be obtained by browsing by a user, so that the actual requirements of the transaction of the digital collection and the like are met.

Generally, after the digital collection is up-linked, the digital collection is stored under a blockchain address corresponding to a casting person, and only the casting person has authority to perform a transfer operation on the digital collection stored under the blockchain address. For example, in an application scenario of digital collection transaction, if a user purchases a digital collection owned by a casting person, the casting person needs to initiate an operation of transferring an on-chain address of the digital collection under a corresponding blockchain address, that is, transferring the digital collection to the on-chain address corresponding to the user for storage, so as to ensure the security of on-chain storage of the digital collection.

By way of example, the primary on-chain information that the digital collection gets to be on-chain may include imgurl (public network address), file hash (content hash), token id (unique on-chain identification), etc., which is not limited in this regard. The unique identification on the chain of the digital collection is the identification of the digital collection on the blockchain, so that the intelligent contract deployed on the blockchain node can refuse the digital collection corresponding to the unique identification on the chain already existing on the blockchain to be re-uploaded.

After the digital collection is stored in the upper chain, a user search requirement exists, for example, if the digital collection is an artwork, the user needs to search out related on-chain information of a piece of artwork, so that whether the piece of artwork is to be purchased or not is further judged according to the searched on-chain information, and accordingly, the transaction of the digital collection is carried out; for another example, if the digital collection is audio, the user needs to retrieve information on a related chain of a certain artwork, so as to obtain information such as copyright of the audio according to the retrieved information on the chain, which is not limited to the practical application scenario applicable to the embodiment of the present application.

As described in the background, in prior art implementations, user retrieval of a uplinked digital collection is typically performed by either transaction hashing or other on-chain credential to a browser or blockchain node, or by loading all of the data of the digital collection from the blockchain to a database, and retrieving from the database via collection keywords. However, in the former retrieval method, since the on-chain credential information such as transaction hash is irregular, the number of bits is generally greater than or equal to 64 bits, and the user is required to memorize the complicated transaction hash or other on-chain credential information during retrieval, which is very inconvenient for the user to retrieve and use. The latter search mode needs to load the data on the blockchain into a database and process the data into a format capable of inquiring through keywords, indexes the keywords, and is complex to develop and large in storage resource occupation.

To solve the above problems, embodiments of the present application respectively propose a method for searching digital collections on a blockchain, a device for searching digital collections on a blockchain, a system for searching digital collections on a blockchain, an electronic device, a computer storage medium, and a computer program product.

These embodiments will be described in detail below.

Referring to fig. 2, fig. 2 is a schematic diagram of a search system for digital collections on a blockchain according to an exemplary embodiment of the present application. As shown in fig. 2, the system includes a terminal 210, a browser end 220, a cloud photo library 230, and a blockchain network 240, and wired or wireless communication can be performed between the terminal 210 and the browser end 220, between the browser end 220 and the cloud photo library 230, between the browser end 220 and the blockchain network 240, and between the client end 210 and the blockchain network 240.

In the retrieval system of digital collections on a blockchain shown in fig. 2, the terminal 210 is configured to provide a user interaction interface for supporting a retrieval operation of a user on a digital collection. For example, in the user interaction interface illustrated in fig. 3, the user may initiate a digital collection search request to the browser 220 by triggering the search box on the user transaction interface to upload a picture for searching for a digital collection, for example, by taking a photograph or selecting an incoming picture from an album, and clicking a trigger "search" button, where the digital collection search request may carry information about the picture.

It should be noted that, the picture for searching for the digital collection is also referred to as collection guiding information, and includes related features of the digital collection to be searched, so that the digital collection searching can be triggered based on the collection guiding information input in the terminal 210. In an actual application scenario, the collection guide information may be not only a picture, but also other digital contents such as audio and video, which is not limited herein. It should be noted that, the user interaction interface provided by the terminal 210 may be an interface of a web client or an interface of an APP (Application) client, which is not limited herein.

Browser end 220 may be implemented as a browser server for providing data services for the operation of terminal 210. The browser server may be an independent physical server, a server cluster or a distributed system formed by a plurality of physical servers, or a cloud server providing cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, CDNs (Content Delivery Network, content delivery networks), basic cloud computing services such as big data and artificial intelligent platforms, and the like.

It should be understood that Cloud technology (Cloud technology) is a generic term for network technology, information technology, integration technology, management platform technology, application technology, etc. based on Cloud computing business model application, and may form a resource pool, where the resource pool is used as needed, and is flexible and convenient. Cloud computing (clouding) is a computing model that distributes computing tasks across a large pool of computers, enabling various application systems to acquire computing power, storage space, and information services as needed. The network that provides the resources is referred to as the "cloud". Resources in the cloud are infinitely expandable in the sense of users, and can be acquired at any time, used as needed, expanded at any time and paid for use as needed. As a basic capability provider of cloud computing, a cloud computing resource pool (abbreviated as a cloud platform, generally called IaaS (Infrastructure as a Service, infrastructure as a service) platform) is established, and multiple types of virtual resources are deployed in the resource pool for external clients to select for use.

After receiving the digital collection search request sent by the terminal 210, the browser 220 forwards collection guide information in the digital collection search request to the cloud picture library 230, so as to perform a search response of the corresponding digital collection after receiving query result data returned by the cloud picture library 230, so that the terminal 210 obtains uplink information of the corresponding digital collection, and performs search result display of the corresponding digital collection based on the uplink information.

Illustratively, the query result data includes on-chain credential information, and the search response of the browser 220 for the corresponding digital collection according to the on-chain credential information returned by the cloud picture library 230 may include the following procedures:

and inquiring the uplink information of the corresponding digital collection from the blockchain network 240 according to the on-chain credential information returned by the cloud picture library 230, and returning the inquired uplink information to the terminal 210 so as to display the retrieval result of the corresponding digital collection based on the uplink information in the terminal 210. It can be seen that in this process, the corresponding digital stock is queried from the blockchain network 240 by the browser 220 for the uplink information.

In another exemplary embodiment, the search response of the browser 220 to the corresponding digital collection according to the on-chain credential information returned by the cloud picture library 230 may further include the following procedures:

the on-chain credential information returned by the cloud picture library 230 is returned to the terminal 210, so that the terminal 210 queries the uplink information of the corresponding digital collection from the blockchain network 240 according to the on-chain credential information, and performs the search result display of the corresponding digital collection based on the uplink information. In this process, the terminal 210 queries the blockchain network 240 for the uplink information of the corresponding digital collection.

In an actual application scenario, the uplink information of the corresponding digital collection may be queried from the blockchain network 240 through the terminal 210 or the browser 220 according to actual requirements, which is not limited in this embodiment. It should be appreciated that the terminal 210 or the browser 220 queries the blockchain network 240 for the uplink information of the corresponding digital collection, specifically by querying from blockchain nodes in the blockchain network 240.

Still further exemplary, the query result data includes uplink information of the corresponding digital collection, and the browser end 220 forwards the uplink information of the corresponding digital collection returned by the cloud picture library 230 to the terminal 210, so that the terminal 210 directly performs the search result display of the corresponding digital collection according to the received uplink information.

In this embodiment, the cloud picture library 230 is a cloud server for processing digital collection picture retrieval, but this does not mean that the system proposed in this embodiment is only used for supporting the scenario of picture retrieval of digital collections, for example, the cloud picture library 230 may be replaced by a cloud audio library or a cloud video library. The cloud picture library 230 stores pre-stored stock features obtained by extracting features of the linked digital stock in advance, and stores the on-link credential information of the linked digital stock in association with the pre-stored stock features thereof. Based on this, after receiving the collection guide information forwarded by the browser end 220, the cloud image library 230 extracts feature data corresponding to the collection guide information through a pre-configured feature extraction program, then queries pre-stored collection features matched with the feature data, and returns on-chain credential information associated with the queried pre-stored collection features as search result data to the browser end 220, so that the browser end 220 performs a search response of a corresponding digital collection based on the above-described process.

Or in some application scenarios, the cloud image library 230 may be deployed as node equipment in the blockchain network 240, after the cloud image library 230 queries the pre-stored collection features matched with the feature data corresponding to the collection guiding information, further obtains on-chain credential information associated with the pre-stored collection features, queries from the blockchain of the cloud image library according to the on-chain credential information to obtain the uplink information of the corresponding data collection, and returns the queried uplink information as search result data to the browser end 220, so that the browser end 220 responds to the search of the corresponding digital collection. The cloud picture library 230 can be implemented by using the existing cloud service, and does not need to be implemented from scratch by a developer, so that the search system of the digital collection on the blockchain is simple and convenient to develop. For example, an existing Cloud service may be implemented with Cloud Storage (Cloud Storage) as a technical support, where Cloud Storage is a new concept that extends and develops in the concept of Cloud computing, and a distributed Cloud Storage system (hereinafter referred to as a Storage system for short) refers to a Storage system that integrates a large number of Storage devices (Storage devices are also referred to as Storage nodes) of various types in a network through application software or application interfaces to cooperatively provide data Storage and service access functions together through functions such as cluster application, grid technology, and distributed Storage file systems. In addition, the cloud image library 230 does not need to store the detailed content of the digital collection, but only stores the characteristic data of the digital collection, so that the storage occupation resource is small.

Taking the retrieval system of digital collections on a blockchain as shown in fig. 2 as an example, the interaction flow involved in implementing the retrieval of digital collections based on pictures can be represented as shown in fig. 4. Fig. 4 specifically illustrates an interaction flow in which the search result data returned by the cloud picture library 230 to the browser 220 includes on-chain credential information corresponding to the digital collection. As shown in fig. 4, a user uploads a picture for retrieving a digital stock to a browser terminal 220 through a terminal 210, so that the browser terminal retrieves a matched pre-stored stock feature from a cloud picture library 230 according to the received picture. The cloud picture library 230 returns the on-chain credential information associated with the retrieved pre-stored collection feature to the browser end 220, so that the browser end 220 queries the complete uplink information of the corresponding digital collection from the blockchain node. The queried uplink information is returned to the terminal 210 for display of the search result after being subjected to format processing by the browser end 220, wherein the format processing can be understood as processing the uplink information into a data format required by the terminal 210.

Fig. 5 is an interface diagram illustrating a display of a search result of a corresponding digital collection based on uplink information in an exemplary terminal 210. As shown in fig. 5, taking a digital collection as an artwork picture as an example, the exemplary search result display interface displays information such as unique on-chain identification, picture content, transaction hash value, author name, work name, serial ID (Identity Document, identity number), issuer, issue time, URL (Uniform Resource Locator ) address on the work chain, owner, transaction record, etc. corresponding to the digital collection, which are queried from the blockchain network 240.

The retrieval system for the digital collection on the blockchain provided by the embodiment is used for retrieving the digital collection on the blockchain by extracting the characteristic data of the collection guide information and combining technical means such as characteristic extraction and matching, so that a user is not required to memorize the transaction hash of the digital collection or other on-chain credentials to retrieve the digital collection, and a database of the digital collection is not required to be reconstructed, and more convenient digital collection retrieval is realized. For example, as can be clearly understood from the contents illustrated in fig. 3 and 5, the user can obtain the interface for displaying the search result of the digital collection as illustrated in fig. 5 by uploading the picture for searching the digital collection through the user transaction interface as illustrated in fig. 3, which is very convenient.

In another exemplary embodiment, as shown in fig. 6, the retrieval system of digital collections on a blockchain further includes a service end 610 on the basis of that shown in fig. 2, where the service end 610 establishes wired or wireless communication with the cloud graphics library 230 and the blockchain network 240, respectively.

The service end 610 corresponds to a caster of the digital collection, and is configured to initiate a chaining of the digital collection in the blockchain network 240, and send the collection information of the digital collection and the chaining credential information to the cloud image library 230 after obtaining the chaining credential information of the digital collection, where the collection information of the digital collection is content of the digital collection, such as picture content, audio content, video content, and the like. The cloud picture library 230 obtains corresponding pre-stored collection characteristics by extracting characteristics of the received collection information, and then stores the obtained pre-stored collection characteristics in association with the corresponding on-chain credential information.

Fig. 7 shows a schematic flow chart of a service end 610 initiating a digital collection upload. As shown in fig. 7, after the digital collection is cast, the casting initiates the on-chain storage of collection information to the blockchain network 240 through the business end 610 by the casting machine, and the digital collection is attributed to the casting machine. After successful uplink, blockchain network 240 returns on-chain credential information to service end 610. The service end 610 submits the collection information and the on-chain credentials of the uplink digital collection to the cloud image library 230 to perform feature extraction on the received collection information to obtain corresponding pre-stored collection features, and then performs association storage on the obtained pre-stored collection features and the corresponding on-chain credentials information, so that the subsequent search process of the uplink digital collection can be acted on. And in another embodiment, the service end 610 is further configured to initiate an on-chain address transfer of the digital collection that is already on-chain, and send the on-chain unique identifier and update auxiliary information of the corresponding digital collection to the cloud image library 240 after obtaining the on-chain address of the digital collection that is already on-chain. The cloud picture library 230 searches the corresponding stored auxiliary information according to the received unique identifier on the chain, and updates and stores the searched auxiliary information according to the received updated auxiliary information, so that after the on-chain address transfer of the digital collection is completed, the on-chain credential information stored in the cloud picture library 230 is updated in the same step to meet the actual application requirements, such as the transaction of the digital collection.

Fig. 8 shows a schematic flow chart of a service end 610 initiating address transfer on a digital collection chain. As shown in fig. 8, because the storage of the digital collection on the blockchain is attributed to the caster, the transfer of the digital collection needs to be initiated by the caster through the business end 610. After successful transfer, the blockchain network 240 returns new on-chain credential information to the service 610. The service end 610 sends the unique identifier and the update auxiliary information on the chain of the corresponding digital stock to the cloud image library 230, so that the cloud image library 230 updates the related information stored in the digital stock.

Referring to fig. 9, fig. 9 is a flowchart illustrating a method for searching digital collections on a blockchain according to an exemplary embodiment.

The method is applied to a digital collection retrieval system, and the digital collection retrieval system comprises a client, a retrieval server and a blockchain network, wherein the client is used for initiating the retrieval of the digital collection, the retrieval server is used for carrying out the retrieval response of the digital collection, and the digital collection is stored in the blockchain network. The method is specifically executed by the retrieval server.

The digital collection retrieval system to which the method is applied can be specifically implemented as the retrieval system of digital collections on the blockchain shown in fig. 2, and specifically implemented by the cloud image library 230 in the system shown in fig. 2. The terminal 210 and the browser 220 in the system shown in fig. 2 may be equivalent to clients included in the digital collection retrieval system to which the method is applied.

As shown in fig. 9, in an exemplary embodiment, the method includes the following steps S910 to S930:

s910, receiving collection guide information sent by a client for searching digital collections;

s920, extracting feature data corresponding to the collection guide information, and inquiring pre-stored collection features matched with the feature data, wherein the pre-stored collection features comprise feature data obtained by feature extraction of the linked digital collection in advance;

and S930, after acquiring the on-chain credential information stored in association with the pre-stored collection characteristics, returning query result data to the client so as to perform retrieval response of the corresponding digital collection at the client according to the query result data.

In step S910, the collection guidance information contains features corresponding to the digital collection, for example, the collection guidance information may be digital content such as pictures, audio, video, etc., which can embody features related to the corresponding digital collection, so that the collection guidance information may be used as information for retrieving the uplink digital collection. Compared with the on-chain credential information such as transaction hash, the collection guide information is easier to obtain and use by a user, for example, when the digital collection is a picture, the user can be used for searching the digital collection by only storing the picture in a terminal album or taking the picture at hand. For example, when the digital picture is audio, the user can just save or record the audio for searching the digital collection. Therefore, the method is very convenient for the user to search the digital collection on the blockchain, and can promote the search experience of the user.

The client may be understood as including a client foreground and a client background, where the client foreground is a user-oriented application program for providing a user interaction interface to implement a search operation of a user for a digital collection, and the client background is used to provide data support for operations such as searching of a corresponding digital collection in the client foreground, and is not limited herein. The collection guide information may be carried by a digital collection retrieval request initiated by the client foreground.

In step S920, since the search server performs feature extraction on the uplink digital stock in advance to obtain a corresponding pre-stored stock feature, and performs association storage on the pre-stored stock feature and the corresponding on-link credential information, after receiving the stock guide information sent by the client, the search server can extract feature data corresponding to the stock guide information, and inquire about the pre-stored stock feature matched with the feature data, where the digital stock corresponding to the inquired pre-stored stock feature is generally the digital stock that the user wants to search.

The process of searching the pre-stored collection features matched with the feature data corresponding to the collection guide information by the search server, that is, the process of performing feature-to-feature matching, for example, cosine similarity between the features can be used as matching degree, and the method is not limited herein. If the matching degree between the two features is greater than or equal to a specified threshold, the two features are matched.

The feature extraction program used for extracting the pre-stored collection features of the digital collection in the retrieval server is the same as the feature extraction program used for extracting the feature data corresponding to the collection guide information, so that the accuracy of the subsequent feature matching process is ensured.

When the search server side supports the search scene of different types of digital collections, for example, the search of the digital collections such as the picture type, the audio type, the video type and the like can be simultaneously supported, and different types of feature extraction programs are pre-configured in the search server side so as to select proper feature extraction programs to extract feature data of collection guide information and pre-stored collection features of the digital collections in actual application.

As can be seen from the above, in this embodiment, by setting the search server, extracting feature data corresponding to the collection guiding information in the search server, and performing matching query of the feature data and the pre-stored collection features, the digital collection to be searched can be rapidly located. Meanwhile, the cloud gallery does not need to store the detailed content of the digital collection, but only stores the characteristic data of the digital collection, so that the occupation of storage resources can be reduced.

In addition, the searching server can be realized by using the existing cloud service, such as the existing picture searching library, audio searching library, video searching library or other searching libraries capable of simultaneously realizing various digital content searching, and provides an interface for uploading and searching the data, so that a developer is not required to realize from scratch, and the searching development of digital collection on a block chain is simple and convenient.

In step S930, the retrieval server further obtains on-chain credential information associated with the pre-stored item feature based on the pre-stored item feature obtained by matching in step S920, and returns retrieval result data to the client. The on-chain voucher information is voucher information of the corresponding digital stock already stored on the blockchain, and for example, the on-chain voucher information comprises an on-chain unique identifier and a transaction hash, so that the on-chain voucher information acquired by the retrieval server can represent that the corresponding digital stock is in a state of being on-chain, and the on-chain information of the corresponding digital stock can be queried from the blockchain according to the on-chain voucher information, namely, the on-chain information is relevant information which a user wants to retrieve.

In an exemplary embodiment, the query result data includes on-chain credential information, and the client performing a search response for the corresponding digital collection according to the received query result data means that the client background performs a response to a digital collection search request sent by the client foreground according to the on-chain credential information included in the query result data, so that the client foreground can obtain uplink information of the searched corresponding digital collection, so as to perform search result display for the corresponding digital collection according to the uplink information.

Illustratively, the search response of the corresponding digital collection according to the on-chain credential information in the client background comprises the following processes:

and inquiring the uplink information of the corresponding digital stock from the blockchain network according to the on-chain credential information, and returning the inquired uplink information to the client foreground so as to display the retrieval result of the corresponding digital stock based on the uplink information in the client foreground. The client background queries the uplink information of the corresponding digital collection from the blockchain network according to the on-chain credential information, specifically, queries a blockchain node in the blockchain network, for example, queries a blockchain node nearest to the client or queries a blockchain node having a communication connection with the client in advance, which is not limited herein.

Still another exemplary, the retrieval response of the corresponding digital collection according to the on-chain credential information in the client background includes the following process:

and returning the on-chain voucher information to the client foreground, so that the client foreground queries the uplink information of the corresponding digital collection from the blockchain network according to the on-chain voucher information, and displays the retrieval result of the corresponding digital collection based on the uplink information. Similarly, the client foreground queries the uplink information of the corresponding digital stock from the blockchain network according to the on-chain credential information, and particularly queries the corresponding digital stock on a blockchain node in the blockchain network.

In another exemplary embodiment, the query result data includes uplink information corresponding to the digital collection. For example, the search server may be deployed as a node device in the blockchain network, after the search server queries the pre-stored item features matched with the feature data corresponding to the item guiding information, further obtains on-chain credential information associated with the pre-stored item features, queries from its blockchain according to the on-chain credential information to obtain uplink information of the corresponding data item, and returns the queried uplink information as search result data to the client, so that the client displays a search result of the corresponding digital item according to the received uplink information.

For another example, after the search server obtains the on-chain credential information associated with the pre-stored product feature, the search server may query corresponding uplink information from the blockchain network according to the on-chain credential information, and then return the queried uplink information to the client.

No matter which process is used for realizing the search response of the client to the corresponding digital collection based on the search result data, the client can obtain the search result display of the corresponding digital collection by transmitting collection guide information for searching the digital collection to the client, and the embodiment can realize the search of the digital collection on the blockchain by extracting the characteristic data of the collection guide information and combining technical means such as characteristic extraction and matching.

In another exemplary embodiment, considering that there may be a plurality of blockchain networks for storing digital collections in an actual application scenario, the search server or the cloud photo library stores the pre-stored collection features of the digital collections stored on the blockchains and the associated on-chain credential information, so in step S920, a plurality of pre-stored collection features matched with feature data corresponding to the collection guiding information may be queried.

Referring to fig. 10, for exemplary purposes, fig. 10 is a schematic diagram of another system for retrieving digital collections on a blockchain that is presented based on the structure of the system of fig. 6. The system illustrated in fig. 10 includes a blockchain network 1, a blockchain network 2, and a blockchain network 3, which are mutually independent blockchain networks. The system illustrated in fig. 10 further comprises a service end 1, a service end 2 and a service end 3, wherein each service end is used for initiating storage of the respective cast digital stock on each blockchain network, and after the digital stock is successfully linked, correlation storage of pre-stored stock characteristics of the linked digital stock and on-chain credential information is carried out in a cloud picture library. Thus in the application scenario illustrated in fig. 10, the cloud tile library will store pre-stored collection characteristics of digital collections on multiple blockchains and associated on-chain credential information. Correspondingly, when the cloud picture library performs the matched pre-stored article feature query according to the feature data corresponding to the article guiding information, a plurality of pre-stored article features may be queried.

Based on this, if the number of pre-stored collection features matched with the feature data corresponding to the collection guiding information is multiple in step S920, the search result data returned by the search server to the client includes on-chain credential information associated with each pre-stored collection feature, so that the client aggregates the received multiple on-chain credential information to perform a search response of the corresponding digital collection.

The step of the client side aggregating the received multiple on-chain credential information to perform the retrieval response of the corresponding digital collection means that the browser enables the client side to query the uplink information of the corresponding digital collection from different blockchain networks according to the multiple on-chain credential information respectively, and enables the client side to perform the retrieval result display of the corresponding digital collection based on the aggregated uplink information, wherein the aggregation of the uplink information can be understood as the combination or merging of the uplink information.

For example, if the matching pre-stored item characteristics include pre-stored item characteristics 1, pre-stored item characteristics 2 and pre-stored item characteristics 3, wherein the pre-stored item characteristics 1 are characteristic data of the digital item 1 stored in the blockchain network 1, the pre-stored item characteristics 2 are characteristic data of the digital item 2 stored in the blockchain network 2, the pre-stored item characteristics 3 are characteristic data of the digital item 3 stored in the blockchain network 3, the client or the client queries the uplink information 1 of the digital item 1 in the deblocking chain network 1 according to the on-chain credential information 1 associated with the pre-stored item characteristics 1, queries the uplink information 2 of the digital item 2 in the deblocking chain network 2 according to the on-chain credential information 2 associated with the pre-stored item characteristics 2, and queries the uplink information 3 of the digital item 3 in the deblocking chain network 3 according to the on-chain credential information 3 associated with the pre-stored item characteristics, and finally obtains the information for final retrieval result display by aggregating the uplink information 1, the uplink information 2 and the uplink information 1.

In addition, exemplary, the crawler technology may be used to crawl the pre-stored collection characteristics of the digital collection stored on the plurality of blockchains and the associated on-chain credential information, and store the obtained pre-stored collection characteristics and the associated on-chain credential information in the search server, or the search server may communicate with the plurality of blockchain networks, so that the extraction of the pre-stored collection characteristics of the on-chain digital collection and the associated storage of the on-chain credential information in the search server are performed in the search server, and the method of the search server to obtain the pre-stored collection characteristics of the digital collection and the associated on-chain credential information is not limited herein.

It should be further understood that the Crawler technology is also called a Web Crawler, and is a program or script that automatically captures Web information according to a certain rule, and the Web Crawler may be broadly classified into four types of general Web crawlers (General Purpose Web Crawler), focused Web crawlers (Focused Web Crawler), incremental Web crawlers (Incremental Web Crawler) and Deep Web crawlers (Deep Web crawlers) according to a system structure and implementation technology, which are not limited herein to the specific type of Crawler technology used in the present embodiment.

In another exemplary embodiment, the search server may be deployed as a node device in one of the blockchain networks, and when the search server queries that the number of pre-stored collection features matched with the feature data corresponding to the collection guiding information is multiple, obtain on-chain credential information stored in association with each pre-stored collection feature, and then query, from the locally stored blockchain, on-chain information corresponding to the digital collection according to the on-chain credential information, where the on-chain credential information refers to on-chain credential information corresponding to the blockchain locally stored by the search server. The search server returns the search result data to the client, wherein the search result data comprises the up-link information inquired from the locally stored blockchain and other on-chain credential information except the target on-chain credential information.

After receiving the search result data, the client still needs to query uplink information corresponding to credential information on other chains from the corresponding blockchain network, and then displays the search result of the corresponding digital collection based on the aggregated uplink information.

Or in some embodiments, the search server may obtain the corresponding multiple on-chain credential information according to the multiple prestored collection features matched with the feature data corresponding to the collection guide information, and then respectively query the uplink information of the corresponding digital collection from different blockchain networks, and then correspondingly return the queried multiple uplink information to the client, so that the client can directly display the search result of the corresponding digital collection based on the aggregated uplink information.

From the above, it can be seen that the technical solution provided by the embodiment can satisfy the application scenario of storing digital collections in the multi-blockchain network, and under the application scenario, the retrieval results displayed by the client side aggregate the digital collection storage conditions in the multi-blockchain network, so that the more comprehensive digital collection retrieval results can be achieved.

In another exemplary embodiment, in step S930, the matching degree between the feature data corresponding to the collection guiding information and the pre-stored collection feature that is matched is also returned to the client, so that the client performs the search response of the corresponding digital collection according to the query result data returned by the search server when the matching degree is greater than or equal to the preset threshold, where the detailed process of the client performing the search response of the corresponding digital collection according to the on-chain credential information is referred to in the foregoing embodiment, and is not repeated herein.

If the matching degree is smaller than the preset threshold, the client side actively filters the search result when judging that the feature matching degree between the data collection corresponding to the search result data returned by the search server side and the collection guide information is smaller.

In the application scenario mentioned in the foregoing embodiment, in which a plurality of blockchain networks are used for storing digital collections, if the number of the matched pre-stored collection features is multiple based on the feature data corresponding to the collection guiding information in the search server, the search server also returns the matching degree between the feature data corresponding to the collection guiding information and each pre-stored collection feature to the client, so that the client selects the on-chain credential information associated with the pre-stored collection feature with the matching degree greater than or equal to the preset threshold to perform the search response of the corresponding digital collection.

From the above, the accuracy of the search result of the digital collection can be further controlled at the client through the embodiment, specifically, the search result finally displayed in the client is obtained by screening the comparison result of the size between the client and the preset threshold based on the matching degree between the features, so that the accuracy of the search result finally displayed in the client can be improved to a certain extent.

In another exemplary embodiment, as shown in fig. 11, the method for searching for digital collections on a blockchain further includes the following steps S1110 to S1130 on the basis of the embodiment shown in fig. 9:

s1110, receiving collection information of the uplink digital collection sent by the service end and on-chain credential information;

s1120, extracting features of the collection information to obtain pre-stored collection features corresponding to the digital collection;

s1130, associating and storing the prestored stock characteristics corresponding to the digital stock with the on-chain credential information.

In step S1110, the service end corresponds to a caster of the digital collection, and is configured to initiate a top link of the digital collection in the blockchain network, and send the collection information of the digital collection and the top link credential information to the search server after obtaining the top link credential information of the digital collection that is already up-linked. The collection information of the digital collection is the content of the digital collection, such as picture content, audio content, video content, and the like.

In step S1120, the search server performs feature extraction on the collection information to obtain pre-stored collection features corresponding to the digital collection, where the pre-stored collection features are feature data of the digital collection. For example, if the collection information of the digital collection is the picture content, the pre-stored collection characteristics may be obtained by performing the picture characteristic extraction on the picture content; if the collection information of the digital collection is audio content, pre-stored collection characteristics can be obtained by extracting audio characteristics of the audio content; if the collection information of the digital collection is video content, pre-stored collection characteristics can be obtained by extracting audio characteristics of the video content.

In step S1130, since the corresponding on-chain credential information is obtained after any digital collection is linked, the pre-stored collection feature corresponding to the digital collection and the on-chain credential information may be stored in association, so that the on-chain credential information corresponding to the pre-stored collection feature is queried based on the stored association in the subsequent step to retrieve the digital collection, which is not described herein.

Illustratively, the on-chain voucher information includes a transaction hash and an on-chain unique identifier corresponding to the on-chain digital collection, and the transaction hash and the on-chain unique identifier of each digital collection are unique. When the retrieval server side carries out associated storage on the pre-stored collection characteristics of the on-chain digital collection and the corresponding on-chain credential information, the pre-stored collection characteristics corresponding to the digital collection and the unique on-chain identification are associated and stored, so that the corresponding digital collection can be determined based on the unique on-chain identification, and the transaction hash is stored as the auxiliary information of the corresponding digital collection, wherein the auxiliary information is used for carrying out retrieval response of the corresponding digital collection on the client side in cooperation with the unique on-chain identification, and the cooperation means that the client side receives the corresponding returned auxiliary information while receiving the unique on-chain identification returned by the retrieval server side.

In another exemplary embodiment, the collection information of the digital collection and the on-chain credential information that are already up-linked are transmitted by the service end to the search service end through the designated upload interface, for example, as shown in fig. 12, in a scenario where the digital collection is a picture content, the upload parameters of the designated upload interface may include, besides some common public parameters, a unique ID or URL of the picture, a unique on-chain identifier of the digital collection, and a transaction hash.

When the address transfer on the chain occurs to the digital stock under the blockchain address where the service end is located, for example, a certain digital stock cast by a casting person is successfully traded out, and the trade hash of the digital stock can be changed correspondingly. The service end sends the on-chain unique identification of the transferred on-chain address and updated auxiliary information, namely the changed transaction hash, to the retrieval server end through the appointed uploading interface, the retrieval server end searches the corresponding stored auxiliary information according to the on-chain unique identification and then updates and stores the searched auxiliary information according to the updated auxiliary information, and therefore the retrieval server end can synchronously update the corresponding stored information to meet the requirements of actual application scenes even after the digital stock is transferred on-chain address successfully.

In addition, the business end sends the unique identification and update auxiliary information on the chain of the digital collection of the address on the transferred chain through the appointed uploading interface, so that after the digital collection is successfully transferred to the address on the chain, collection information corresponding to the digital collection does not need to be submitted again, application resources are saved, and the efficiency of digital collection retrieval is improved to a certain extent.

Fig. 13 is a flow chart illustrating another method of retrieving digital collections on a blockchain according to another exemplary embodiment of the present application. The method is also applied to the digital collection retrieval system recorded in the previous embodiment, and the digital collection retrieval system comprises a client, a retrieval server and a blockchain network, wherein the client is used for initiating the retrieval of the digital collection, the retrieval server is used for carrying out the retrieval response of the digital collection, the digital collection is stored in the blockchain network, and the method is specifically executed by the client.

As shown in fig. 13, the method includes the following steps S1310 to S1330:

s1310, sending collection guide information for searching the digital collection to a search server;

s1320, receiving query result data returned by a retrieval server, wherein the query result data is characteristic data corresponding to the retrieval server extracting collection guide information, querying pre-stored collection characteristics matched with the characteristic data, and returning the query result data after acquiring on-chain credential information stored in association with the pre-stored collection characteristics, wherein the pre-stored collection characteristics comprise characteristic data obtained by carrying out characteristic extraction on the digital collection on a chain in advance;

S1330, according to the search result data, the corresponding digital collection search response is performed.

It should be noted that, in step S1330, if the query result data includes on-chain credential information, the client may query the uplink information of the corresponding digital collection from the blockchain network according to the on-chain credential information, and perform the search result display of the corresponding digital collection based on the uplink information; if the query result data comprises uplink information corresponding to the digital collection, the client displays a search result corresponding to the digital collection based on the uplink information, wherein the uplink information is obtained by querying from a blockchain according to on-chain credential information when a search server is deployed as a blockchain node in a blockchain network.

If the query result data received by the client side comprises a plurality of on-chain credential information, respectively querying the uplink information of the corresponding digital collection from different blockchain networks according to the on-chain credential information, and displaying the retrieval result of the corresponding digital collection based on the aggregated uplink information.

In another exemplary embodiment, before step S1330, the client further receives a matching degree between the feature data corresponding to the stock guide information returned by the search server and the pre-stored stock feature, so as to perform a search response of the corresponding digital stock according to the query result data when the matching degree is greater than or equal to the preset threshold.

The detailed execution process of each step is described in the foregoing embodiments, and the detailed description of this embodiment is omitted here.

FIG. 14 is a block diagram of a retrieval device for digital collections on a blockchain as contemplated by an exemplary embodiment of the present application. The device is applied to a digital stock retrieval system, the system comprises a client, a retrieval server and a blockchain network, the digital stock is stored in the blockchain network, and the device is configured in the retrieval server. The digital collection retrieval system applicable to the device can be specifically implemented as the retrieval system of digital collections on the blockchain shown in fig. 2, and the retrieval server is equivalent to the cloud image library 230 in the system shown in fig. 2.

As shown in fig. 14, in an exemplary embodiment, the apparatus includes:

the collection guide information receiving module 1410 is configured to receive collection guide information sent by the client for retrieving the digital collection;

the pre-stored item feature query module 1420 is configured to extract feature data corresponding to the item guide information, and query pre-stored item features matched with the feature data, wherein the pre-stored item features comprise feature data obtained by feature extraction for the linked digital item in advance;

The query result feedback module 1430 is configured to return query result data to the client after acquiring the on-chain credential information stored in association with the pre-stored collection feature, so as to perform a search response of the corresponding digital collection at the client according to the query result data.

The device realizes the retrieval of the digital collection on the blockchain by extracting the characteristic data of the collection guide information and combining technical means such as characteristic extraction and matching, and compared with the prior art, the device does not need a user to memorize the transaction hash of the digital collection or other on-chain credentials to retrieve the digital collection, does not need to reconstruct a database of the digital collection, and realizes more convenient digital collection retrieval.

In another exemplary embodiment, the pre-stored item feature query module 1420 is further configured to:

if the number of the prestored collection features matched with the feature data corresponding to the collection guide information is multiple, search result data containing on-chain credential information associated with each prestored collection feature is returned to the client, so that the client can respectively inquire the uplink information of the corresponding digital collection from different blockchain networks according to the multiple on-chain credential information contained in the received search result data, and display the search result of the corresponding digital collection based on the aggregated uplink information.

if the number of the prestored stock features matched with the feature data corresponding to the stock guide information is multiple, acquiring on-chain credential information stored in association with each prestored stock feature; inquiring the uplink information of the corresponding digital stock from the locally stored blockchain according to the credential information on the target chain; and returning search result data to the client, wherein the search result data comprises the uplink information queried from the locally stored blockchain and other on-chain credential information except the on-target chain credential information.

In another exemplary embodiment, the query result feedback module 1430 is further configured to:

and returning the matching degree between the feature data corresponding to the collection guide information and the pre-stored collection features to the client so that the client can search and respond to the corresponding digital collection according to the query result data when the matching degree is greater than or equal to a preset threshold.

In another exemplary embodiment, the apparatus further comprises:

the uplink information receiving module is configured to receive the collection information of the uplink digital collection and the on-link credential information sent by the service end;

The pre-stored collection feature extraction module is configured to perform feature extraction on collection information to obtain pre-stored collection features corresponding to the digital collection;

and the data association storage module is configured to associate and store prestored stock characteristics corresponding to the digital stock with the on-chain credential information.

In another exemplary embodiment, the on-chain credential information includes a transaction hash and an on-chain unique identifier corresponding to the on-chain digital stock; the data-associated storage module is further configured to:

and storing the pre-stored collection characteristics corresponding to the digital collections in an associated mode with the unique identification on the chain, and storing the transaction hash as auxiliary information corresponding to the digital collections, wherein the auxiliary information is used for carrying out search response of the corresponding digital collections on the browser side in cooperation with the unique identification on the chain.

In another exemplary embodiment, the stock information of the uplinked digital stock is imported by the business end through the designated upload interface; the apparatus further comprises:

the updating information receiving module is configured to receive an on-chain unique identifier of the digital collection of the transferred on-chain address sent by the service end through the appointed uploading interface and update the auxiliary information;

the auxiliary information inquiry module is configured to search the corresponding stored auxiliary information according to the unique identification on the chain;

And the auxiliary information updating module is configured to update and store the searched auxiliary information according to the updated auxiliary information.

Fig. 15 is a block diagram of a retrieval device for digital collections on a blockchain as enabled by another exemplary embodiment of the present application. The device is applied to a digital stock retrieval system, the system comprises a client, a retrieval server and a blockchain network, the digital stock is stored in the blockchain network, and the device is configured in the client. The digital collection retrieval system to which the device is applicable can be specifically implemented as the retrieval system of digital collections on the blockchain shown in fig. 2, and the client is equivalent to the terminal 210 and the browser 220 in the system shown in fig. 2.

As shown in fig. 15, in an exemplary embodiment, the apparatus includes:

a stock guide information transmitting module 1510 configured to transmit stock guide information for retrieving the digital stock to the retrieval server; a query result data receiving module 1520 configured to receive query result data returned by the search server, where the query result data is feature data corresponding to the collection guide information extracted by the search server, and queries pre-stored collection features matched with the feature data, and after acquiring on-chain credential information stored in association with the pre-stored collection features, the pre-stored collection features include feature data obtained by feature extraction for a digital collection on a chain in advance; the search response module 1530 is configured to perform a search response for the corresponding digital collection according to the search result data.

In another exemplary embodiment, the retrieve response module 1530 is further configured to:

if the query result data comprises on-chain credential information, querying uplink information of the corresponding digital stock from the blockchain network according to the on-chain credential information, and displaying a retrieval result of the corresponding digital stock based on the uplink information; or if the query result data comprises the uplink information of the corresponding digital stock, displaying the search result of the corresponding digital stock based on the uplink information, wherein the uplink information is obtained by querying from the blockchain according to the on-chain credential information when the search server is deployed as the blockchain node in the blockchain network.

In another exemplary embodiment, the device further includes a matching degree receiving module configured to receive a matching degree between feature data corresponding to the collection guidance information returned by the search server and a pre-stored collection feature; the retrieve response module 1530 is further configured to: and when the matching degree is greater than or equal to a preset threshold value, carrying out retrieval response of the corresponding digital collection according to the query result data. It should be noted that, the apparatus provided in the foregoing embodiments and the method provided in the foregoing embodiments belong to the same concept, and the specific manner in which each module and unit perform the operation has been described in detail in the method embodiments, which is not repeated herein. In practical application, the device provided in the above embodiment may distribute the functions to different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above, which is not limited herein.

The embodiment of the application also provides electronic equipment, which comprises: one or more processors; and the storage device is used for storing one or more programs, and when the one or more programs are executed by the one or more processors, the electronic equipment realizes the searching method of the digital collection on the blockchain provided in the various embodiments.

Fig. 16 shows a schematic diagram of a computer system suitable for use in implementing the electronic device of the embodiments of the present application. It should be noted that, the computer system 1600 of the electronic device shown in fig. 16 is only an example, and should not impose any limitation on the functions and the application scope of the embodiments of the present application.

As shown in fig. 16, the computer system includes a central processing unit (Central Processing Unit, CPU) 1601 that can perform various appropriate actions and processes, such as performing the methods described in the above embodiments, according to a program stored in a Read-Only Memory (ROM) 1602 or a program loaded from a storage section 1608 into a random access Memory (Random Access Memory, RAM) 1603. In the RAM 1603, various programs and data required for system operation are also stored. The CPU 1601, ROM 1602, and RAM 1603 are connected to each other by a bus 1604. An Input/Output (I/O) interface 1605 is also connected to bus 1604.

The following components are connected to the I/O interface 1605: an input portion 1606 including a keyboard, a mouse, and the like; an output portion 1607 including a Cathode Ray Tube (CRT), a liquid crystal display (Liquid Crystal Display, LCD), and the like, a speaker, and the like; a storage portion 1608 including a hard disk or the like; and a communication section 1609 including a network interface card such as a LAN (Local Area Network ) card, a modem, or the like. The communication section 1609 performs communication processing via a network such as the internet. The drive 1610 is also connected to the I/O interface 1605 as needed. A removable medium 1611 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is installed as needed on the drive 1610 so that a computer program read out therefrom is installed into the storage section 1608 as needed.

In particular, according to embodiments of the present application, the processes described above with reference to flowcharts may be implemented as computer software programs. For example, embodiments of the present application include a computer program product comprising a computer program embodied on a computer readable medium, the computer program comprising a computer program for performing the method shown in the flowchart. In such embodiments, the computer program may be downloaded and installed from a network via the communication portion 1609, and/or installed from the removable media 1611. When executed by a Central Processing Unit (CPU) 1601, the computer program performs the various functions defined in the system of the present application.

It should be noted that, the computer readable medium shown in the embodiments of the present application may be a computer readable signal medium or a computer readable storage medium, or any combination of the two. The computer readable storage medium may be, for example, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of the computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-Only Memory (ROM), an erasable programmable read-Only Memory (Erasable Programmable Read Only Memory, EPROM), flash Memory, an optical fiber, a portable compact disc read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the present application, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, with a computer-readable computer program embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. A computer program embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the foregoing.

The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present application. Where each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams or flowchart illustration, and combinations of blocks in the block diagrams or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

The units involved in the embodiments of the present application may be implemented by means of software, or may be implemented by means of hardware, and the described units may also be provided in a processor. Wherein the names of the units do not constitute a limitation of the units themselves in some cases.

Another aspect of the present application also provides a computer readable storage medium having stored thereon a computer program which when executed by a processor implements a method of retrieving a digital collection on a blockchain as described above. The computer-readable storage medium may be included in the electronic device described in the above embodiment or may exist alone without being incorporated in the electronic device.

Another aspect of the present application also provides a computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device performs the retrieval method of the digital collection on the blockchain provided in the above embodiments.

The foregoing is merely a preferred exemplary embodiment of the present application and is not intended to limit the embodiments of the present application, and those skilled in the art may make various changes and modifications according to the main concept and spirit of the present application, so that the protection scope of the present application shall be subject to the protection scope of the claims.

It will be appreciated that in the specific embodiments of the present application, related data such as collection guidance information, feature data, on-chain voucher information, and uplink information needs to be obtained for user approval or consent when the above embodiments of the present application are applied to specific products or technologies, and the collection, use, and processing of related data needs to comply with related laws and regulations and standards of related countries and regions.

Claims

1. The method is applied to a digital collection retrieval system, the system comprises a client, a retrieval server and a blockchain network, the digital collection is stored in the blockchain network, and the method is executed by the retrieval server and comprises the following steps:

receiving collection guide information sent by the client for searching digital collections;

extracting feature data corresponding to the collection guide information, and inquiring pre-stored collection features matched with the feature data, wherein the pre-stored collection features comprise feature data obtained by feature extraction of the linked digital collection in advance;

and after acquiring the on-chain credential information stored in association with the pre-stored collection characteristics, returning query result data to the client so as to carry out retrieval response of the corresponding digital collection according to the query result data at the client.

2. The method according to claim 1, wherein the method further comprises:

if the number of the prestored collection features matched with the feature data corresponding to the collection guide information is multiple, search result data containing on-chain credential information associated with each prestored collection feature is returned to the client, so that the client obtains the uplink information of the corresponding digital collection respectively inquired on different blockchain networks according to the received search result data, and the search result display of the corresponding digital collection is carried out based on the aggregated uplink information.

3. The method according to claim 1, wherein the method further comprises:

if the number of the prestored stock features matched with the feature data corresponding to the stock guide information is multiple, acquiring on-chain credential information stored in association with each prestored stock feature;

inquiring the uplink information of the corresponding digital stock from the locally stored blockchain according to the credential information on the target chain;

and returning search result data to the client, wherein the search result data comprises uplink information inquired from a locally stored blockchain and other on-chain credential information except the target on-chain credential information.

4. A method according to any one of claims 1-3, characterized in that the method further comprises:

5. The method according to claim 1, wherein the method further comprises:

receiving collection information of the uplink digital collection sent by a service end and on-link credential information;

extracting features of the collection information to obtain pre-stored collection features corresponding to the digital collection;

and carrying out association storage on pre-stored collection characteristics corresponding to the digital collection and the on-chain credential information.

6. The method of claim 5, wherein the on-chain voucher information includes a transaction hash and an on-chain unique identifier corresponding to the uplinked digital collection;

the step of associating and storing the pre-stored collection characteristics corresponding to the digital collection with the on-chain credential information comprises the following steps:

and storing the pre-stored collection characteristics corresponding to the digital collection in association with the unique identification on the chain, and storing the transaction hash as auxiliary information corresponding to the digital collection, wherein the auxiliary information is used for carrying out search response of the corresponding digital collection by cooperating with the unique identification on the chain at the browser end.

7. The method of claim 6, wherein the stock information of the uplinked digital stock and the on-chain credential information are entered by the business side through a designated upload interface; the method further comprises the steps of:

receiving an on-chain unique identifier of the digital collection of the transferred on-chain address and updating auxiliary information sent by the service end through the appointed uploading interface;

searching the corresponding stored auxiliary information according to the unique identifier on the chain;

and updating and storing the searched auxiliary information according to the updated auxiliary information.

8. A method for searching digital collections on a blockchain, the method being applied to a digital collection search system, the system comprising a client, a search server and a blockchain network, the digital collections being stored in the blockchain network, the method being performed by the client and comprising:

sending collection guide information for searching digital collections to the search server;

receiving query result data returned by the search server, wherein the query result data is characteristic data corresponding to the collection guide information extracted by the search server, inquiring pre-stored collection characteristics matched with the characteristic data, and returning the query result data after acquiring on-chain credential information stored in association with the pre-stored collection characteristics, wherein the pre-stored collection characteristics comprise characteristic data obtained by carrying out characteristic extraction on the digital collection on a chain in advance;

And carrying out search response of the corresponding digital collection according to the search result data.

9. The method of claim 8, wherein the performing a search response for the corresponding digital collection according to the search result data comprises:

if the query result data comprises the on-chain credential information, querying uplink information of the corresponding digital collection from the blockchain network according to the on-chain credential information, and displaying a retrieval result of the corresponding digital collection based on the uplink information;

or,

and if the query result data comprises uplink information corresponding to the digital collection, displaying a search result corresponding to the digital collection based on the uplink information, wherein the uplink information is obtained by querying from a blockchain according to the on-chain credential information when the search server is deployed as a blockchain node in the blockchain network.

10. The method according to claim 9, wherein the method further comprises:

if the query result data comprises a plurality of on-chain credential information, respectively querying the uplink information of the corresponding digital collection from different blockchain networks according to the on-chain credential information;

And displaying the search result of the corresponding digital collection based on the aggregated uplink information.

11. The method of claim 8, wherein prior to the retrieval response of the corresponding digital collection based on the retrieval result data, the method further comprises:

receiving the matching degree between the feature data corresponding to the collection guide information returned by the retrieval server and the pre-stored collection features;

the searching response of the corresponding digital collection according to the searching result data comprises

And when the matching degree is greater than or equal to a preset threshold value, carrying out retrieval response of the corresponding digital collection according to the query result data.

12. The retrieval system of the digital collection on the blockchain is characterized by comprising a terminal, a browser end, a cloud picture library and a blockchain network, wherein:

the terminal is used for sending a digital collection retrieval request to the browser end, wherein the digital collection retrieval request contains collection guide information;

the browser end forwards the collection guide information to the cloud image library;

the cloud image library extracts feature data corresponding to the collection guide information, queries pre-stored collection features matched with the feature data, wherein the pre-stored collection features comprise feature data obtained by carrying out feature extraction on the digital collection on a chain in advance, and returns query result data to the browser after acquiring on-chain credential information stored in association with the pre-stored collection features;

And the browser end performs search response of the corresponding digital collection according to the received query result data so as to enable the terminal to obtain uplink information of the corresponding digital collection, and performs search result display of the corresponding digital collection based on the uplink information.

13. The system of claim 12, further comprising a service end for initiating a chaining of digital collections in the blockchain network, the chaining credential information of the uplinked digital collections being sent to the cloud graphics library after obtaining the chaining credential information of the uplinked digital collections;

the cloud image library is also used for extracting characteristics of the received collection information, obtaining corresponding pre-stored collection characteristics, and storing the obtained pre-stored collection characteristics and corresponding on-chain credential information in an associated mode.

14. The system of claim 13, wherein the on-chain credential information includes a transaction hash and an on-chain unique identifier corresponding to the on-chain digital collection;

the service end is also used for initiating the on-chain address transfer of the digital collection which is on-chain, and after the on-chain address of the digital collection transferred is obtained, the unique on-chain identification and the update auxiliary information of the corresponding digital collection are sent to the cloud image library;

The cloud image library is also used for searching the corresponding stored auxiliary information according to the received unique identifier on the chain and updating and storing the searched auxiliary information according to the received updated auxiliary information.

15. The device is applied to a digital collection retrieval system, the system comprises a client, a retrieval server and a blockchain network, the digital collection is stored in the blockchain network, and the device is configured in the retrieval server and comprises:

the collection guide information receiving module is configured to receive collection guide information sent by the client and used for searching the digital collection;

the pre-stored collection feature query module is configured to extract feature data corresponding to the collection guide information and query pre-stored collection features matched with the feature data, wherein the pre-stored collection features comprise feature data obtained by feature extraction of the linked digital collection in advance;

and the query result feedback module is configured to return query result data to the client after acquiring the on-chain credential information stored in association with the pre-stored collection characteristics so as to perform retrieval response of the corresponding digital collection according to the query result data at the client.

16. A retrieval device for digital collections on a blockchain, the device being applied to a digital collection retrieval system, the system comprising a client, a retrieval server and a blockchain network, the digital collections being stored in the blockchain network, the device being configured in the client and comprising:

the collection guide information sending module is configured to send collection guide information for searching the digital collection to the search server;

the query result data receiving module is configured to receive query result data returned by the search server, wherein the query result data is characteristic data corresponding to the collection guide information extracted by the search server, and queries pre-stored collection characteristics matched with the characteristic data, and returns after acquiring on-chain credential information stored in association with the pre-stored collection characteristics, and the pre-stored collection characteristics comprise characteristic data obtained by carrying out characteristic extraction on digital collection on a chain in advance;

and the search response module is configured to perform search response of the corresponding digital collection according to the search result data.

17. An electronic device, comprising:

One or more processors;

storage means for storing one or more programs that, when executed by the one or more processors, cause the electronic device to implement the method of any of claims 1-11.

18. A computer readable storage medium having stored thereon computer readable instructions which, when executed by a processor of a computer, cause the computer to perform the method of any of claims 1-11.

19. A computer program product comprising a computer program, characterized in that the computer program, when executed by a processor, implements the method of any of claims 1-11.