CN-122023491-A - Information processing device, information processing method, and program

Abstract

The invention aims to more appropriately estimate the length of an object contained in a depth image. An information processing apparatus has an acquisition section that acquires an input image, a scale factor estimation section that estimates a scale factor for converting a relative depth estimated based on the input image into an absolute depth by machine learning, and an absolute depth estimation section that converts the relative depth into an absolute depth based on the scale factor.

Inventors

• SHINJO KOTA
• KANAI TAKAYUKI
• YOSHIZAWA SHINTARO

Assignees

• 丰田自动车株式会社

Dates

Publication Date

20260512

Application Date

20251020

Priority Date

20241111

Claims (5)

1. 1. An information processing apparatus, comprising: An acquisition unit that acquires an input image; a scale factor estimating section estimating a scale factor for converting a relative depth estimated based on the input image into an absolute depth, and An absolute depth estimation unit that converts the relative depth into an absolute depth based on the scale factor.
2. 2. The information processing apparatus according to claim 1, wherein, The scale factor estimating section performs the following processing: estimating two-dimensional bone information of a person of a subject based on the input image; Generating three-dimensional bone information based on the relative depth and the two-dimensional bone information, and The scale factor is estimated based on the three-dimensional bone information and statistical data of the human body size.
3. 3. The information processing apparatus according to claim 1, wherein, The absolute depth estimating section calculates the absolute depth by multiplying the relative depth by the scale factor.
4. 4. An information processing method, characterized by comprising the steps of: Acquiring an input image; Estimating a scale factor for converting a relative depth estimated based on the input image to an absolute depth, and The relative depth is converted to an absolute depth based on the scale factor.
5. 5. A program for causing a computer to execute: Acquiring an input image; Estimating a scale factor for converting a relative depth estimated based on the input image to an absolute depth, and The relative depth is converted to an absolute depth based on the scale factor.

Description

Information processing device, information processing method, and program Technical Field The present invention relates to an information processing apparatus, an information processing method, and a program. Background Patent document 1 discloses a technique of estimating the height of a person contained in an acquired depth image. More specifically, in patent document 1, an image of a person contained in a depth image is extracted and divided into parts of a head, an upper body, a thigh, and a shank. Further, the actual length of each component is estimated by the trained neural network model, and the posture of the person is estimated from the estimated length of each component and the topological relation analyzed from each component. Moreover, the actual height of the person is estimated by further applying this information to the trained neural network model. Patent document 1 Chinese patent application publication No. 112861699 specification Disclosure of Invention However, in the related art, for example, a trained neural network model needs to be prepared for each part of a person, and thus there is room for improvement in terms of calculation cost and the like. The present invention aims to provide a technique capable of more appropriately estimating the length of an object contained in a depth image. In aspect 1 of the present invention, there is provided an information processing apparatus including an acquisition unit that acquires an input image, a scale factor estimation unit that estimates a scale factor (scale factor) for converting a relative depth estimated based on the input image into an absolute depth, and an absolute depth estimation unit that converts the relative depth into an absolute depth based on the scale factor. In aspect 2 of the present invention, there is provided an information processing method including the steps of acquiring an input image, estimating a scale factor for converting a relative depth estimated based on the input image into an absolute depth, and converting the relative depth into the absolute depth based on the scale factor. In the 3 rd aspect of the present invention, there is provided a program for causing a computer to execute a process of acquiring an input image, estimating a scale factor for converting a relative depth estimated based on the input image into an absolute depth, and converting the relative depth into the absolute depth based on the scale factor. Effects of the invention According to one aspect, the length of the object contained in the depth image can be estimated more appropriately. Drawings Fig. 1 is a diagram showing an example of a configuration of an information processing apparatus according to an embodiment. Fig. 2 is a flowchart showing an example of processing performed by the information processing apparatus according to the embodiment. Fig. 3 is a flowchart showing an example of processing performed by the information processing apparatus according to the embodiment. Fig. 4 is a diagram showing an example of a hardware configuration of the information processing apparatus according to the embodiment. Detailed Description The principles of the present invention are described with reference to several exemplary embodiments. These embodiments are described for illustrative purposes only and are not meant to limit the scope of the present invention, as it is understood to be helpful to those skilled in the art to understand and practice the present invention. The invention described in the present specification can be realized by various methods other than those described below. In the following description and claims, unless otherwise defined, all technical and scientific terms used in this specification have the meanings commonly understood by one of ordinary skill in the art to which this invention belongs. Hereinafter, embodiments of the present invention will be described with reference to the drawings. < Structure > The configuration of an information processing apparatus 10 according to an embodiment will be described with reference to fig. 1. Fig. 1 is a diagram showing an example of a configuration of an information processing apparatus 10 according to an embodiment. In the example of fig. 1, the information processing apparatus 10 includes an acquisition unit 11, a scale factor estimation unit 12, and an absolute depth estimation unit 13. These portions can be realized by cooperation of 1 or more programs installed in the information processing apparatus 10 and hardware such as a processor and a memory of the information processing apparatus 10. The acquisition unit 11 acquires an input image (two-dimensional image) captured by the imaging device. The scale factor estimating section 12 estimates (calculates, determines) a scale factor for converting the relative depth into the absolute depth a. The absolute depth estimating unit 13 converts the relative depth into an absolute depth based on the scale factor estimated b