We will introduce a method to obtain three-dimensional data using two-dimensional joint point data measured by OpenPose, without markers.
**What is OpenPose?** OpenPose is a method developed by Zhe Cao and others at Carnegie Mellon University (CMU) that visualizes human poses using deep learning. Specifically, it can detect human joint points simply by inputting a still image. In other words, displaying the positions of joints as points makes it easier to understand angles at the knees or the degree of elbow bending. However, it is important to note that these are purely 2D data and do not take depth into account. **Expansion from 2D to 3D** By utilizing our proprietary calibration technology, we can obtain markerless 3D surface point cloud data of a person. We can then apply the 2D joint point coordinates obtained from OpenPose to this data to derive 3D joint point coordinates. **Number of Cameras and Measurement Accuracy** - With 3 cameras: We can measure the full-body surface point cloud data, allowing for accurate joint point coordinates. - With 2 cameras: We cannot measure the full-body surface point cloud data. - With 1 camera: Please refer to the attached materials for more details.
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**Why Measure Human Posture and Movement?** The ease or difficulty with which a person handles objects is unconsciously reflected in their posture and movements. Furthermore, the condition of a person's body is also manifested in their posture and movements. Therefore, measuring a person's posture and movements is extremely important for understanding the quality of objects and the state of the body. **What is Measured Without Markers?** **Gait Measurement** - **Measurement Items** Walking speed, stride length, body tilt (forward/backward, left/right), head height, arm swing angle, shoulder and hip rotation, hip joint tilt (forward/backward, left/right), knee angle, foot extension/flexion, etc. - **Utilization of Data** By using the above data to evaluate the effectiveness of target products or services (such as rehabilitation or fitness instruction), it can be utilized in their development and design. **Movement Measurement (Usage)** - **Measurement Items** Body tilt (forward/backward, left/right), movements of arms and legs, shoulder and hip rotation, etc. - **Utilization of Data** By using the above data to evaluate the effectiveness of target products or services (such as sports instruction), it can be utilized in their development and design. For specific examples, please refer to individual use cases.
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【Evaluation Technology Based on Ergonomics】 Rather than evaluating individual products or services, the evaluation is conducted in light of the various characteristics of the people using them. For example, items used by hand include razors, food wraps, food containers, sinks (including faucets), vacuum cleaners, and car steering wheels. The "goodness or badness" of such items manifests unconsciously in posture and actions. 【Evaluation Technology Based on Life Engineering】 In contrast to ergonomics, which studies the relationship between people and objects or services, life engineering focuses on the relationship between life and objects or services. An important role of life engineering is to understand what actions people take or do not take in various situations of life. From these results, unmet needs of people can be discovered. 【Markerless Measurement of Human Posture and Motion】 For both ergonomics and life engineering, the ability to easily and unconsciously measure human posture and motion without markers is crucial for assessing the compatibility between people and objects or services, as well as for identifying unmet needs. For more details, please refer to the markerless three-dimensional motion analysis system "Anakin System" (Human and Life Engineering, Consulting).
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HAL Design Research Institute Co., Ltd. is a company that conducts analysis, design, engineering, and consulting based on various measurements and measurement data. Our main product is the "Markerless 3D Motion Analysis System." We also offer a variety of other measurement services, so please feel free to contact us if you have any requests.
