2D Video to 3D Avatar Synchronization for Motion Analysis
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Solution Overview
Problem
Conventional 2D video analysis is limited in providing advanced data and visualization for human motion analysis, while 3D motion visualization offers more comprehensive insights but requires expensive and time-consuming setup with sensors or markers.
Innovation Solution
A system that overlays 2D video with a 3D avatar using synchronization technologies, allowing users to compare their motion with idealized 3D motion by selecting key points and using tools like sliders, rotation, and zoom to synchronize and analyze movements side by side or overlaid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If 3D motion visualization is used, then measurement precision and data quality are improved, but device complexity and setup time increase
Solution Approach 1:
The patent creates a digital 3D avatar copy of the user's motion captured from simple 2D video. This virtual avatar replicates the user's movements and allows for sophisticated 3D motion analysis without requiring complex physical 3D motion capture equipment. The avatar serves as a digital twin that can be analyzed in detail while the actual capture setup remains simple.
Solution Approach 2:
The patent introduces a 3D avatar as an intermediary between the simple 2D video capture and the complex 3D motion analysis. The avatar acts as a mediator that transforms basic video input into detailed motion data, allowing users to get advanced analytics without directly using complex 3D motion capture systems.
2Measurement precision
If 3D motion visualization is used, then measurement precision is improved, but cost increases
Solution Approach 1:
The system creates a digital 3D avatar copy that can be generated and manipulated at low cost. Instead of investing in expensive 3D motion capture hardware, users can capture motion using standard video cameras and process it through software to create a detailed 3D avatar representation, achieving high measurement precision without high equipment costs.
Solution Approach 2:
The patent replaces complex mechanical 3D motion capture systems with a software-based solution that processes standard video input. By substituting physical sensors and markers with computer vision and 3D rendering technology, the system achieves sophisticated motion analysis at a fraction of the cost of traditional 3D motion capture equipment.
3Ease of operation
If 2D video is used, then ease of operation is improved, but measurement precision deteriorates
Solution Approach 1:
The patent transforms 2D video data into a 3D avatar representation, adding a dimensional layer to the analysis. By converting flat 2D video frames into a three-dimensional virtual model, the system maintains the simplicity of 2D video capture while gaining the measurement precision and analytical capabilities of 3D motion visualization.
Solution Approach 2:
The system creates a 3D digital copy (avatar) from 2D video input. This virtual replica allows for detailed motion analysis in three dimensions while the original capture method remains simple 2D video recording. The avatar copy enables precise measurement of angles, speeds, and movement patterns that would be difficult to extract from raw 2D video alone.
Data Source
AI summary
A processing device receive a two dimensional (2D) video recording of a subject user performing a physical activity and provides a three dimensional (3D) visualization comprising a virtual avatar performing the physical activity. The processing device causes display of the 3D visualization comprising the virtual avatar at a first key point in performing the physical activity, receives first user input to advance the 2D video recording to a first position corresponding the first key point, and receives second user input comprising a first synchronization command. In response, the processing device generates a first synchronization marker to indicate the first position in the 2D video recording corresponding to the first key point.