WO2017149755A1 - Dispositif de recherche, procédé de recherche, programme et support d'enregistrement d'informations lisible par ordinateur non temporaire - Google Patents

Dispositif de recherche, procédé de recherche, programme et support d'enregistrement d'informations lisible par ordinateur non temporaire Download PDF

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Publication number
WO2017149755A1
WO2017149755A1 PCT/JP2016/056782 JP2016056782W WO2017149755A1 WO 2017149755 A1 WO2017149755 A1 WO 2017149755A1 JP 2016056782 W JP2016056782 W JP 2016056782W WO 2017149755 A1 WO2017149755 A1 WO 2017149755A1
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WO
WIPO (PCT)
Prior art keywords
product
unit
search device
dimensional
shooting direction
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Ceased
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PCT/JP2016/056782
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English (en)
Japanese (ja)
Inventor
アディヤン ムジビヤ
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Rakuten Group Inc
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Rakuten Inc
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Priority to PCT/JP2016/056782 priority Critical patent/WO2017149755A1/fr
Publication of WO2017149755A1 publication Critical patent/WO2017149755A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor

Definitions

  • the present invention relates to a search device, a search method, a program, and a non-transitory computer-readable information recording medium.
  • sales sites for electronic commerce have become popular on the Internet.
  • a sales site switching mall site
  • stores virtual stores
  • a user performs a search by inputting a product name or a keyword, and searches for a target product from the product information displayed in a list.
  • Patent Document 1 discloses a prior art that searches (identifies) a similar object from a photographic image.
  • Patent Document 1 When applying the technology of Patent Document 1 described above to a sales site, it was necessary to register a three-dimensional model for each product. However, since the products on the sales site are enormous and new products are frequently registered, it is expected that it is difficult to register a three-dimensional model for each product.
  • the present invention has been made in view of the above circumstances, and a search device, a search method, a program, and non-transitory computer-readable information capable of appropriately searching for a product similar to a desired three-dimensional model
  • An object is to provide a recording medium.
  • the search device provides: A reception unit for receiving a shape model representing a desired three-dimensional shape; For each product to be searched, an estimation unit that estimates a shooting direction in which the product is photographed from a two-dimensional photographic image representing the product, For each of the estimated shooting directions, a generating unit that generates a two-dimensional observation image obtained by observing the shape model from the shooting direction; For each of the photographic images, a determination unit that determines whether the shooting direction is similar to the corresponding observation image, An output unit that outputs product information about the photographic image determined to be similar; It is characterized by providing.
  • a storage unit that stores relevant information that associates the shooting direction estimated by the estimation unit with the corresponding photographic image;
  • the generation unit may generate an observation image obtained by observing the shape model from the shooting direction according to related information stored in the storage unit.
  • the estimation unit may identify one or more vanishing points according to a plurality of edge portions extracted from the photographic image, and estimate a shooting direction based on the identified vanishing points.
  • the determination unit obtains a feature amount for a shape from each of the photograph image and the observation image, and determines whether the photograph image and the observation image are similar based on the obtained feature amounts. Also good.
  • the search method is: A search method in a search device, An accepting step in which the search device accepts a shape model representing a desired three-dimensional shape; An estimation step in which the search device estimates, for each product to be searched, a shooting direction in which the product is photographed from a two-dimensional photograph image representing the product; A generation step in which the search device generates a two-dimensional observation image obtained by observing the shape model from the shooting direction for each of the estimated shooting directions; A determination step for determining whether or not the retrieval direction is similar to the corresponding observation image for each of the photographic images; An output step in which the search device outputs product information about the photographic image determined to be similar; It is characterized by providing.
  • the program according to the third aspect of the present invention is: Computer A reception unit for receiving a shape model representing a desired three-dimensional shape; For each product to be searched, an estimation unit that estimates a shooting direction in which the product is photographed from a two-dimensional photographic image representing the product, For each of the estimated shooting directions, a generating unit that generates a two-dimensional observation image obtained by observing the shape model from the shooting direction; For each of the photographic images, a determination unit that determines whether the shooting direction is similar to the corresponding observation image, An output unit that outputs product information about the photographic image determined to be similar; It is made to function as.
  • the above program can be distributed and sold via a computer communication network independently of the computer on which the program is executed.
  • a non-transitory computer-readable information recording medium for the fourth aspect of the present invention.
  • a reception unit for receiving a shape model representing a desired three-dimensional shape; For each product to be searched, an estimation unit that estimates a shooting direction in which the product is photographed from a two-dimensional photographic image representing the product, For each of the estimated shooting directions, a generating unit that generates a two-dimensional observation image obtained by observing the shape model from the shooting direction; For each of the photographic images, a determination unit that determines whether the shooting direction is similar to the corresponding observation image, An output unit that outputs product information about the photographic image determined to be similar; A program characterized by functioning as a program is recorded.
  • the information recording medium is a non-transitory recording medium, and can be distributed and sold independently of the computer.
  • the non-temporary recording medium refers to a tangible recording medium.
  • Non-temporary recording media are, for example, compact disks, flexible disks, hard disks, magneto-optical disks, digital video disks, magnetic tapes, semiconductor memories, and the like.
  • the transitory recording medium refers to the transmission medium (propagation signal) itself.
  • the temporary recording medium is, for example, an electric signal, an optical signal, an electromagnetic wave, or the like.
  • the temporary storage area is an area for temporarily storing data and programs, and is, for example, a volatile memory such as a RAM (Random Access Memory).
  • a product similar to a desired three-dimensional model can be appropriately searched.
  • a sales site (shopping mall site) constituted by a collection of many stores (virtual stores) will be described as an example.
  • the present invention can be appropriately applied to a sales site by a single store (trader). .
  • the following embodiments are for explanation, and do not limit the scope of the present invention. Therefore, those skilled in the art can employ embodiments in which each or all of these elements are replaced with equivalent ones, and these embodiments are also included in the scope of the present invention.
  • a sales system 100 is configured by connecting a search device 200 and each user terminal 300 via the Internet 900 as shown in FIG. Although simplified in the figure, it is assumed that there are a large number of user terminals 300 according to the users to be used.
  • the search device 200 includes, for example, a sales server (server computer) and the like, and provides information related to products to the user terminal 300 and sells products desired by the user. For example, the search device 200 sells products of many stores (virtual stores), and presents a list page of products to the user terminal 300 that has accessed. As will be described later, a shape model (three-dimensional model) representing a desired three-dimensional shape is transmitted from the user terminal 300 to the search device 200 as a query. Then, the search device 200 compares an observation image appropriately generated from the shape model with a photographic image (product image) of the product, and presents a list page of products determined to be similar to the user terminal 300.
  • a sales server server computer
  • the user terminal 300 includes, for example, a personal computer or a smartphone, and accesses the search device 200 via the Internet 900 to instruct the search device 200 to search for a product.
  • a shape model three-dimensional shape model
  • the information processing apparatus 400 includes a CPU (Central Processing Unit) 401, a ROM (Read Only Memory) 402, a RAM (Random Access Memory) 403, a NIC (Network Interface Card) 404, an image A processing unit 405, an audio processing unit 406, a DVD-ROM (Digital Versatile Disc Disc ROM) drive 407, an interface 408, an external memory 409, a controller 410, a monitor 411, and a speaker 412 are provided.
  • a CPU Central Processing Unit
  • ROM Read Only Memory
  • RAM Random Access Memory
  • NIC Network Interface Card
  • the CPU 401 controls the overall operation of the information processing apparatus 400 and is connected to each component to exchange control signals and data.
  • the ROM 402 records an IPL (Initial Program Loader) that is executed immediately after the power is turned on, and when this is executed, a predetermined program is read into the RAM 403 and the CPU 401 starts executing the program.
  • the ROM 402 stores an operating system program and various data necessary for operation control of the information processing apparatus 400 as a whole.
  • the RAM 403 is for temporarily storing data and programs, and holds programs and data read from the DVD-ROM and other data necessary for communication.
  • the NIC 404 is used to connect the information processing apparatus 400 to a computer communication network such as the Internet, and conforms to the 10BASE-T / 100BASE-T standard used when configuring a LAN (Local Area Network).
  • Analog modem for connecting to the Internet using a telephone line, ISDN (Integrated Services Digital Network) modem, ADSL (Asymmetric Digital Subscriber Line) modem, cable modem for connecting to the Internet using a cable television line, etc. These are configured by an interface (not shown) that mediates between these and the CPU 401.
  • the image processing unit 405 processes the data read from the DVD-ROM or the like by a CPU 401 or an image arithmetic processor (not shown) provided in the image processing unit 405, and then processes this data in a frame memory provided in the image processing unit 405. (Not shown).
  • the image information recorded in the frame memory is converted into a video signal at a predetermined synchronization timing and output to the monitor 411. Thereby, various page displays are possible.
  • the audio processing unit 406 converts audio data read from a DVD-ROM or the like into an analog audio signal, and outputs the analog audio signal from the speaker 412 connected thereto. Further, under the control of the CPU 401, a sound to be generated during the progress of the processing performed by the information processing apparatus 400 is generated, and a sound corresponding to the sound is output from the speaker 412.
  • the DVD-ROM mounted on the DVD-ROM drive 407 stores, for example, a program for realizing the search device 200 according to the embodiment. Under the control of the CPU 401, the DVD-ROM drive 407 performs a reading process on the DVD-ROM loaded therein, reads necessary programs and data, and these are temporarily stored in the RAM 403 or the like.
  • External memory 409, controller 410, monitor 411, and speaker 412 are detachably connected to interface 408.
  • the external memory 409 stores data relating to the user's personal information in a rewritable manner.
  • the controller 410 accepts operation inputs performed at various settings of the information processing apparatus 400.
  • the user of the information processing apparatus 400 can record these data in the external memory 409 as appropriate by inputting instructions through the controller 410.
  • the monitor 411 presents the data output by the image processing unit 405 to the user of the information processing apparatus 400.
  • the speaker 412 presents the audio data output by the audio processing unit 406 to the user of the information processing apparatus 400.
  • the information processing apparatus 400 uses a large-capacity external storage device such as a hard disk so as to perform the same functions as the DVD-ROM mounted on the ROM 402, RAM 403, external memory 409, and DVD-ROM drive 407 You may comprise.
  • a large-capacity external storage device such as a hard disk so as to perform the same functions as the DVD-ROM mounted on the ROM 402, RAM 403, external memory 409, and DVD-ROM drive 407 You may comprise.
  • each program causing the information processing apparatus 400 to function as the search apparatus 200 according to the present embodiment is executed, thereby realizing the search apparatus 200 according to the present embodiment. Is done.
  • Each user terminal 300 is similarly realized in the information processing apparatus 400, but these configurations are omitted, and the most characteristic search apparatus 200 in the present embodiment will be described below.
  • FIG. 3 is a block diagram illustrating an example of a schematic configuration of the search device 200 according to the present embodiment.
  • the search device 200 includes a reception unit 210, a storage unit 220, a control unit 230, and an output unit 240.
  • the accepting unit 210 accepts various information sent from each user terminal 300 via the Internet 900.
  • the accepting unit 210 accepts from the user terminal 300 a product search instruction and various operation instructions (for example, a mouse click operation by the user) in a list page presented in response to the search instruction.
  • the search instruction from the user terminal 300 includes not only a character search such as a keyword but also an image search.
  • the image search includes not only a search using a two-dimensional image as a query but also a search using a shape model representing a three-dimensional shape as a feature of the present invention as a query.
  • the accepting unit 210 accepts a shape model representing a three-dimensional shape (a shape model in a predetermined format) from the user terminal 300.
  • the above-described NIC 404 or the like can function as such a reception unit 210.
  • the storage unit 220 stores information about products, information about stores, and information about users.
  • the storage unit 220 stores product information 221 as illustrated in FIG.
  • the product information 221 includes a store ID 221a, a product ID 221b, a category name 221c, a product name 221d, a price 221e, and a product image 221f.
  • This product image 221f is a two-dimensional photographic image representing a product.
  • a shooting direction estimated by an estimation unit 231 described later can be added to the product image 221f as attribute information. Instead of adding a shooting direction to the product image 221f, the shooting direction estimated by the estimation unit 231 may be included in the product information 221 as related information of the product image 221f.
  • the estimation unit 231 estimates the shooting direction for each of the plurality of product images 221f, even for the same product.
  • the category name 221c indicates the product in the table, but the actual storage unit 220 stores information on all products in all stores (virtual stores).
  • the storage unit 220 stores store information and user information.
  • the above-described RAM 403, external memory 409, and the like can function as such a storage unit 220.
  • control unit 230 controls the entire search device 200.
  • the control unit 230 includes an estimation unit 231, a generation unit 232, and a determination unit 233, and performs a product search and the like.
  • the estimation unit 231 estimates, for each product to be searched, a shooting direction in which the product is photographed from a two-dimensional photograph image (product image) representing the product. For example, the estimation unit 231 identifies one or more vanishing points according to a plurality of edge portions extracted from the photographic image, and estimates the shooting direction based on the identified vanishing points.
  • the estimation of the shooting direction will be described using the photographic image shown in FIG.
  • the estimation unit 231 extracts an edge portion as shown in FIG. 6 from the photographic image of FIG. Such extraction of the edge portion is performed by, for example, a method of taking out the hue value and luminance value of the pixel in the photographic image through a differential filter and picking out a portion with a large amount of change every week. Note that the edge portion may be extracted by other methods.
  • the estimation unit 231 obtains a point (1 to 3 points) where the straight line of the edge portion is stretched and the stretched straight line is converged as a vanishing point. Specifically, the estimation unit 231 obtains two vanishing points SP as shown in FIG. In FIG.
  • the vanishing point SP is obtained at a close position, but the actual vanishing point SP is obtained at a farther position.
  • the number of vanishing points SP obtained varies depending on the photographic image. For example, only one vanishing point SP can be obtained for a photographic image obtained by photographing a product (table or the like) from the front.
  • three vanishing points SP are obtained for a photographic image obtained by obliquely photographing a product at a short distance.
  • the estimation unit 231 obtains a photographing point based on the vanishing point, and estimates a photographing direction passing through the obtained photographing point.
  • the estimation unit 231 obtains a shooting point VP in which two vanishing points SP are orthogonal to each other as shown in FIG. 8, and estimates a shooting direction Z passing through the shooting point VP. Note that the actual position of the shooting point VP changes according to the focal length of the camera (lens) that has shot, but the shooting direction Z does not change.
  • the estimation unit 231 estimates the shooting direction in which the product is photographed from the photographic image for each of the products to be searched.
  • the estimation unit 231 may store the estimated shooting direction in the storage unit 220 and reuse it when a new shape model is received. For example, the estimation unit 231 adds the estimated shooting direction as attribute information to the product image 221f in the product information 221 of FIG. 4 described above. Further, instead of adding the shooting direction to the product image 221f, the estimation unit 231 may add the shooting direction to the product information 221 as related information of the product image 221f.
  • the generation unit 232 observes a shape model (a three-dimensional shape model accepted by the reception unit 210 as a query) from each of the shooting directions estimated by the estimation unit 231 2.
  • a dimensional observation image is generated.
  • the generation unit 232 expands a shape model in a three-dimensional virtual space, arranges a virtual camera (viewpoint) in the shooting direction in the virtual space, and performs a perspective transformation to generate a two-dimensional observation image. To do.
  • the viewpoint position in the photographing direction may be determined so that the size of the observation image is equal to that of the photographic image (product size).
  • the generation unit 232 generates a two-dimensional observation image obtained by observing the shape model from each of the estimated shooting directions.
  • the determination unit 233 determines whether each of the photographic images is similar to a corresponding observation image (an observation image obtained by observing the shape model from the same shooting direction). For example, the determination unit 233 obtains a feature amount for the shape from each of the photographic image and the observation image, and determines whether the photographic image and the observation image are similar based on the obtained feature amounts. Note that similarity determination between a photographic image and an observation image may be performed by other methods.
  • control unit 230 performs, for example, a predetermined settlement process when a product is purchased by the user.
  • the above-described CPU 401 and the like can function as the control unit 230 having such a configuration.
  • the output unit 240 outputs various information to the user terminal 300 via the Internet 900.
  • the output unit 240 outputs product information about a photographic image that is determined to be similar by the determination unit 233.
  • the output unit 240 presents the search result list page 500 as shown in FIG. 9 to the user terminal 300. That is, even if the direction (photographing direction) of the photographic image registered on the sales site side varies, a product similar to the shape model accepted as a query is appropriately searched and presented to the user. .
  • the above-described CPU 401, NIC 404, and the like can function as such an output unit 240.
  • FIG. 10 is a flowchart showing the flow of search processing executed by the search device 200. This search process is executed each time a three-dimensional shape model is given as a query from the user terminal 300 and a search is instructed.
  • the search device 200 verifies the received shape model (step S11). That is, the control unit 230 verifies that the shape model received by the receiving unit 210 satisfies a predetermined requirement. For example, the control unit 230 verifies whether the shape model is a three-dimensional shape model in a predetermined format or a shape model for a product or the like. If the requirement is not satisfied, an error screen or the like is output from the output unit 240 without performing the subsequent processing. In addition, when the shape model is verified to determine which category (product category) is the shape model, the migration processing is performed by narrowing down the products in the identified category to the search target products. .
  • the search device 200 sets the initial value 1 to the variable n (step S12). This variable n is used when information about the nth product is read from the storage unit 220.
  • the search device 200 estimates the shooting direction of the nth product (step S13). That is, the estimation unit 231 estimates the shooting direction in which the product is captured from the photographic image of the nth product. For example, the estimation unit 231 identifies one or more vanishing points according to a plurality of edge portions extracted from the photographic image, and estimates the shooting direction based on the identified vanishing points. Specifically, the estimation unit 231 extracts the edge portion as shown in FIG. 6 described above from the above-described photographic image of FIG. Next, the estimation unit 231 obtains two vanishing points SP as shown in FIG. Finally, the estimation unit 231 obtains a shooting point VP in which two vanishing points SP as shown in FIG. 8 are orthogonal to each other, and estimates a shooting direction Z passing through the shooting point VP.
  • the search device 200 generates an observation image based on the estimated shooting direction (step S14). That is, the generation unit 232 generates a two-dimensional observation image obtained by observing the shape model from the shooting direction estimated in step S13. For example, the generation unit 232 expands a shape model in a three-dimensional virtual space, arranges a virtual camera (viewpoint) in the shooting direction in the virtual space, and performs a perspective transformation to generate a two-dimensional observation image. To do.
  • the search device 200 determines whether or not the generated observation image is similar to the photographic image of the nth product (step S15). That is, the determination unit 233 determines whether or not the photographic image of the nth product is similar to the observation image generated in step S14. For example, the determination unit 233 obtains a feature amount for the shape from each of the photographic image and the observation image, and determines whether the photographic image and the observation image are similar based on the obtained feature amounts.
  • step S15 If the search device 200 determines that they are not similar (step S15; No), the search device 200 proceeds to step S17 described later.
  • step S15 when it is determined that they are similar (step S15; Yes), the search device 200 reads the information of the nth product from the storage unit 220 and adds it to the search result (step S16).
  • the search device 200 determines whether there is a next product (step S17).
  • step S17 When the search device 200 determines that there is the next product (step S17; Yes), the search device 200 adds 1 to the variable n (step S18). Then, the search device 200 returns the process to step S13 described above.
  • step S17 when it is determined that there is no next product (step S17; No), the search device 200 outputs a search result (step S19). That is, the output unit 240 presents the search result list page 500 as shown in FIG.
  • the merchandise sales site has been described as an example.
  • the present invention can be appropriately applied to a search site for searching for an image.
  • a search device As described above, according to the present invention, a search device, a search method, a program, and a non-transitory computer-readable information recording medium capable of appropriately searching for products similar to a desired three-dimensional model Can be provided.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Data Mining & Analysis (AREA)
  • Databases & Information Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
  • Processing Or Creating Images (AREA)

Abstract

L'invention concerne une unité d'acceptation (210) qui accepte un modèle de forme qui représente une forme tridimensionnelle souhaitée. Pour chaque produit qui est un objet de recherche, une unité d'estimation (231) estime, à partir d'une image photographique bidimensionnelle qui représentent le produit, une direction de photographie depuis laquelle le produit a été photographiée. Pour chacune des directions de photographie estimées, une unité de génération (232) génère une image d'observation bidimensionnelle dans laquelle le modèle de forme a été observé depuis ladite direction de photographie. Pour chacune des images photographiques, une unité d'évaluation (233) évalue si ladite image photographique est similaire à l'image d'observation de la direction de photographie correspondante. Une unité de sortie (240) délivre des informations de produit pour les images photographiques qui ont ainsi été évaluées comme étant similaires.
PCT/JP2016/056782 2016-03-04 2016-03-04 Dispositif de recherche, procédé de recherche, programme et support d'enregistrement d'informations lisible par ordinateur non temporaire Ceased WO2017149755A1 (fr)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005038716A1 (fr) * 2003-10-21 2005-04-28 Nec Corporation Systeme et procede de collationnement d'images

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005038716A1 (fr) * 2003-10-21 2005-04-28 Nec Corporation Systeme et procede de collationnement d'images

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
RYOTA ARAI ET AL.,: "A Simple Shape Modeler for Building Based on Multiple Images", IPSJ SIG NOTES, vol. 2002, no. 77, 9 August 2002 (2002-08-09), pages 37 - 42 *
YUSUKE UCHIDA ET AL.,: "Recent Approaches for Large-scale specific Object Recognition", THE JOURNAL OF THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS, vol. 96, no. 3, 1 March 2013 (2013-03-01), pages 207 - 213 *

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