Measuring, modelling, simulating, and predicting human tissue properties
Bibliographic record
Abstract
Personalized simulation of human bodies is a long standing goal in many applications, ranging from animation to apparel. Even though personalized geometric models can now be easily acquired, physics-based simulation requires soft tissue properties and their distribution over the person’s body. Here we show that mechanical properties of the human body can be directly measured using a novel hand-held device. We describe a complete pipeline for measurement, modeling, parameter estimation, and simulation. The methods described here can be used to create personalized models of an individual human or of a population. Furthermore, we show how to predict soft tissue properties from widely available 3D geometric models of the human body. To train such a prediction model, we utilize a unique database of registered measurements of body shape and soft tissue properties, acquired from over 70 participants. We use a recently introduced convolutional neural network architecture adapted for 3D surfaces, and train the network to predict the distribution of tissue properties over the 3D human body surface. Once the network is trained, no specialized equipment is required, and soft tissue properties are predicted in minutes. The method can be used with commodity 3D scanners, and even with geometric models downloaded from Internet or created by artists. Our methods make realistic human body simulations available to a wide range of users and applications.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.002 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".