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US-12626399-B2 - Information processing device, information processing system, and estimation method

US12626399B2US 12626399 B2US12626399 B2US 12626399B2US-12626399-B2

Abstract

Provided are an information processing device, an information processing system, and an estimation method, which are capable of improving the accuracy of estimating the position of an object planned to pass through a specific area. This information processing device comprises a detection unit that detects a first face image area included in a first image obtained by photographing a person, who is entering a gate, in a first direction, and a second face image area included in a second image obtained by photographing the person in a second direction different from the first direction, and an estimation unit that estimates the position of the person in the gate on the basis of a change in relative positional relationship between the first face image area and the second face image area.

Inventors

  • Masao Kubota

Assignees

  • PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Dates

Publication Date
20260512
Application Date
20220222
Priority Date
20210415

Claims (12)

  1. 1 . An information processing apparatus, comprising: a detector implemented by one or more processors and configured to digitally analyze image data to detect a first face image region included in a first image of a person entering a gate and a second face image region included in a second image of the person, the first image being captured in a first direction, the second image being captured in a second direction different from the first direction; and an estimator implemented by the one or more processors and configured to estimate from pixel-coordinate data of the detected first and second face image regions, a position of the person in the gate based on a change in a relative positional relation between the first face image region and the second face image region over successive image frames.
  2. 2 . The information processing apparatus according to claim 1 , wherein an image-capturing timing for capturing the first image and an image-capturing timing for capturing the second image are synchronized with each other.
  3. 3 . The information processing apparatus according to claim 1 , wherein the estimator estimates the position of the person in the gate based on a change in distance between a representative point of the first face image region and a representative point of the second face image region.
  4. 4 . The information processing apparatus according to claim 3 , wherein when the distance in a horizontal direction between the representative point of the first face image region and the representative point of the second face image region is equal to or less than a threshold, the estimator determines that the person has passed a position defined for the gate.
  5. 5 . The information processing apparatus according to claim 3 , wherein when a polarity of the distance in a horizontal direction from the representative point of the first face image region to the representative point of the second face image region is reversed, the estimator determines that the person has passed a position defined for the gate.
  6. 6 . The information processing apparatus according to claim 4 , further comprising: a face collation processor that performs collation on a face of the person before the person passes the position defined, wherein the information processing apparatus outputs a sound or an image different between a case where the collation on the face of the person is successful and a case where the person is determined to have passed the position defined.
  7. 7 . The information processing apparatus according to claim 3 , wherein: the detector sets, in the first image, an area in which the representative point of the first face image region is predicted to appear first in response to an entry of the person into the gate, and when it is determined that the area includes a plurality of the representative points of the first face image region, the estimator stops estimation of the position of the person.
  8. 8 . The information processing apparatus according to claim 3 , wherein the representative point of the first face image region and the representative point of the second face image region are centers of the first face image region and the second face image region, respectively.
  9. 9 . The information processing apparatus according to claim 1 , wherein the estimator uses, for estimation of the position of the person in the gate, information expressing a relation between, on one hand, information indicating a positional relation between the first face image region and the second face image region, and, on the other hand, the position of the person in the gate.
  10. 10 . The information processing apparatus according to claim 1 , wherein when the first face image region is not detected, the estimator determines whether or not the person has entered a specific region of the gate, based on whether or not a size of the second face image region is equal to or larger than a threshold.
  11. 11 . An information processing system, comprising: an authentication apparatus that executes an authentication process of authenticating a person using at least one of a first image of a person entering a gate and a second image of the person, the first image being captured in a first direction, the second image being captured in a second direction different from the first direction; and an information processing apparatus including one or more processors configured to: detect, by digitally analyzing image data, a first face image region included in the first image and a second face image region included in the second image; and estimate, using pixel-coordinate information of the detected face image regions, a position of the person in the gate based on a change in a relative positional relation between the first face image region and the second face image region over successive image frames.
  12. 12 . An estimation method, comprising steps performed by an information processing apparatus of: digitally analyzing image data to detect a first face image region included in a first image of a person entering a gate and a second face image region included in a second image of the person, the first image being captured in a first direction, the second image being captured in a second direction different from the first direction; and estimating, from pixel-coordinate information of the detected first and second face image regions, a position of the person in the gate based on a change in a relative positional relation between the first face image region and the second face image region over successive image frames.

Description

TECHNICAL FIELD The present disclosure relates to an information processing apparatus, an information processing system, and an estimation method. BACKGROUND ART Techniques for managing entry and exit of a person passing through a gate installed in a station, an airport, or the like are known. Patent Literature (hereinafter, referred to as “PTL”) 1 describes an apparatus that, when a person enters a gate from an entrance of the gate while gaining permission for gate passage using a contactless card, tracks whether or not the person has passed through the gate (whether or not the person returns to the entrance of the gate) based on a change in position of the contactless card. CITATION LIST Patent Literature PTL 1 Japanese Patent Application Laid-Open No. H09-330440 SUMMARY OF INVENTION A gate that manages entry and exit is desired to manage which person has passed through the gate. Hereinafter, this management may also be simply referred to as “passage management” or “tracking management.” There is scope for further study on the improvement in estimation accuracy of estimating the position of a person in the tracking management. One non-limiting and exemplary embodiment of the present disclosure facilitates providing an information processing apparatus, an information processing system, and an estimation method capable of improving estimation accuracy of estimating the position of an object passing through a particular region. An information processing apparatus according to one exemplary embodiment of the present disclosure includes: a detector that detects a first face image region included in a first image of a person entering a gate and a second face image region included in a second image of the person, the first image being captured in a first direction, the second image being captured in a second direction different from the first direction; and an estimator that estimates a position of the person in the gate based on a change in a relative positional relation between the first face image region and the second face image region. An information processing system according to one exemplary embodiment of the present disclosure includes: an authentication apparatus that executes an authentication process of authenticating a person using at least one of a first image of a person entering a gate and a second image of the person, the first image being captured in a first direction, the second image being captured in a second direction different from the first direction; and an information processing apparatus that detects a first face image region included in the first image and a second face image region included in the second image, and estimates a position of the person in the gate based on a change in a relative positional relation between the first face image region and the second face image region. An estimation method according to one exemplary embodiment of the present disclosure includes steps performed by an information processing apparatus of: detecting a first face image region included in a first image of a person entering a gate and a second face image region included in a second image of the person, the first image being captured in a first direction, the second image being captured in a second direction different from the first direction; and estimating a position of the person in the gate based on a change in a relative positional relation between the first face image region and the second face image region. It should be noted that a general or specific embodiment may be implemented as a system, an apparatus, a method, an integrated circuit, a computer program, a storage medium, or any selective combination thereof. One non-limiting and exemplary embodiment of the present disclosure makes it possible to improve estimation accuracy of estimating the position of an object passing through a particular region. Additional benefits and advantages of the disclosed embodiments will become apparent from the specification and drawings. The benefits and/or advantages may be individually obtained by the various embodiments and features of the specification and drawings, which need not all be provided in order to obtain one or more of such benefits and/or advantages. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a diagram illustrating an example of a gate according to an embodiment: FIG. 2A is a diagram illustrating an example of a concept of a configuration of a passage management system according to an embodiment: FIG. 2B is a block diagram illustrating a configuration example of the passage management system according to an embodiment: FIG. 3A is a diagram illustrating an example of a zone defined for a gate: FIG. 3B is a diagram illustrating an example of a zone defined for a gate: FIG. 4 is a diagram illustrating an example of detection of a face frame according to an embodiment; FIG. 5A is a diagram illustrating an example of detection of a position of a person according to an embodiment; FIG. 5B is a d