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JP-7854963-B2 - Image analysis device and image analysis method

JP7854963B2JP 7854963 B2JP7854963 B2JP 7854963B2JP-7854963-B2

Inventors

  • 小辰 信夫

Assignees

  • 株式会社日立ソリューションズ・クリエイト

Dates

Publication Date
20260507
Application Date
20230512

Claims (7)

  1. An image analysis device that analyzes the movement of a subject captured in video data, An estimation unit analyzes the aforementioned video data and estimates that if the amount of vertical change in the first determination area of the subject exceeds a certain value, a determination target movement has occurred that includes at least one of the forward/backward movement and vertical movement of the subject. An image analysis device having a determination unit that, when the movement of the object to be determined occurs, determines whether the movement of the object to be determined includes movement in the front-to-back direction by determining, based on the moving image data, whether the front-to-back change ratio, which is the ratio of change of the determination distance defined by a plurality of second determination parts of the subject before and after the movement of the object, is greater than or equal to a predetermined value.
  2. The image analysis apparatus according to claim 1, wherein the determination unit estimates the distance traveled in the front-rear direction based on the front-rear change ratio.
  3. The image analysis apparatus according to claim 1, wherein the determination distance is the height of the triangle formed by the three second determination regions.
  4. The image analysis apparatus according to claim 3, wherein the determination unit selects multiple combinations of the three second determination areas and calculates the average value of the change ratio of the determination distance for each combination as the before-and-after change ratio.
  5. The image analysis apparatus according to claim 2, further comprising a calculation unit that, when the movement of the object to be determined occurs, determines whether the movement includes upward movement based on position time-series data obtained by estimating the positional changes of multiple parts of the subject before the movement of the object to be determined occurred.
  6. The image analysis apparatus according to claim 5, further comprising a correction unit that corrects the distance of movement in the forward/backward direction based on the position time-series data when the movement of the object to be determined includes both movement in the forward/backward direction and movement in the upward direction.
  7. An image analysis method using an image analysis device that analyzes the movement of a subject captured in video data, By analyzing the aforementioned video data, if the amount of vertical change in the first determination area of the subject exceeds a certain value, it is estimated that a determination target movement has occurred, which includes at least one of the forward/backward movement and vertical movement of the subject. An image analysis method that, when the aforementioned movement of the object to be judged occurs, determines whether the change ratio of the determination distance defined by a plurality of second determination parts of the subject before and after the movement of the object is greater than or equal to a predetermined value, based on the moving image data, thereby determining whether the movement of the object to be judged includes movement in the forward and backward direction.

Description

This disclosure relates to an image analysis device and an image analysis method. In recent years, systems that use artificial intelligence technology to estimate a person's skeletal structure and posture have attracted attention, and the estimation results are being used in areas such as sports instruction. Patent Document 1 discloses a judgment system that calculates the skeleton, joints, and past movement trajectory of a target person based on the detection results of a detection device that detects the distance and direction to an object, such as a laser radar device, and then determines the target person's performance based on these calculation results. Japanese Patent Publication No. 2020-31406 This block diagram shows the functional configuration of a skeletal position estimation and correction device according to an embodiment of the present disclosure.This is a diagram illustrating an example of skeletal position estimation processing.This figure shows an example of the results of skeletal position estimation.This figure shows an example of skeletal position time series data.This figure illustrates an example of how skeletal position estimation results can change.This diagram illustrates an example of the relationship between the distance a subject moves backward and the reduction ratio of the subject within the frame.This is a diagram illustrating an example of a distance used for determination.This diagram illustrates the calculation of the distance traveled by a subject in the forward and backward direction.This is a diagram illustrating the processing performed by the acceleration calculation unit.This is a diagram illustrating the processing performed by the acceleration calculation unit.This is a diagram illustrating an example of compound movement.This figure shows an example of a compound movement.This is a flowchart illustrating an example of the processing performed by the skeletal position estimation and correction device.This is a flowchart illustrating an example of forward/backward movement detection processing.This is a flowchart illustrating an example of the distance estimation process.This is a flowchart illustrating an example of the initial velocity calculation process. The following describes embodiments of the present invention with reference to the drawings. Note that the embodiments described below are not intended to limit the scope of the claimed invention, and not all elements and combinations thereof described in the embodiments are necessarily essential to the solution of the invention.