Perceptual evaluation of footskate cleanup

Pražák, Martin; Hoyet, Ludovic; O’Sullivan, Carol

doi:10.1145/2019406.2019444

Cited by 14 publications

(9 citation statements)

References 19 publications

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“…The motions are collected from real humans with a motion capture system and the plausibility of the simulations is evaluated by humans with a questionnaire. Several works evaluate how the perception of specific aspects of a simulation affect its quality: Pražák et al [2011] focus on the footskate artifact, McDonnell et al [2009] examine the influence of body aspect and motion in the sex perception of walking models and Hoyet et al [2016] study the influence of pedestrians' shoulder motion in the visual quality of the perceived crowd.…”

Section: Validation Techniques Based On Perceptionmentioning

confidence: 99%

Modeling, Evaluation, and Scale on Artificial Pedestrians

et al. 2017

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Modeling pedestrian dynamics and their implementation in a computer are challenging and important issues in the knowledge areas of transportation and computer simulation. The aim of this paper is to provide a bibliographic outlook so that the reader could have a quick access to the most relevant works related with this problem. We have used three main axes to organise the paper contents: pedestrian models, validation techniques and multiscale approaches. The backbone of the paper is the classification of existing pedestrian models; we have organised the works in the literature under five categories, according to the techniques used for implementing the operational level in each pedestrian model. Then, the main existing validation methods, oriented to evaluate the behavioural quality of the simulation systems, are reviewed. Furthermore, we review the key issues that arise when facing multiscale pedestrian modeling, where we firstly focus on the behavioural scale (combinations of micro and macro pedestrian models) and secondly, on the scale size (from individuals to crowds). The paper begins introducing the main characteristics of walking dynamics and its analysis tools and concludes with a discussion about the contributions that different knowledge fields can do in a near future to this exciting area.

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Section: Validation Techniques Based On Perceptionmentioning

confidence: 99%

Modeling, Evaluation, and Scale on Artificial Pedestrians

et al. 2017

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“…Similar to the work [29], further investigation of dynamic foot-to-ground contact could involve a system that evaluates the perception of a sharp foot turn. We can easily conduct various cases of experiments in a sense that the foot turning motion ranges from non-rotating to rotating ankle by simple adjustment of the shape of the velocity cone.…”

Section: Discussionmentioning

confidence: 99%

Human motion control with physically plausible foot contact models

et al. 2015

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The foot-to-ground contact model plays an important role in the simulation of highly dynamic motions, such as turns and kicks. In this paper, we propose a method for solving dynamically cumbersome slipping contact problems, which are frequently observed in highly dynamic motions. We employ and modify a combination of two different types of cones representing the inequality constraints of a contact model: the friction cone and the velocity cone. The friction cone makes character animation physically plausible while the velocity cone allows a character to perform a sharp turn without foot-to-ground penetration. Our system effectively simulates human behavior using an inverted pendulum on a cart (IPC) model and motion capture data. In the preprocessing step, we analyze motion capture data to extract meaningful information for the IPC model. At run-time, our system produces a physically simulated character by tracking the desired motion that is predicted by the IPC model. We formulate human motion control as a quadratic programming satisfying the proposed foot-to-ground contact constraints. Our examples show that the proposed system can produce physically plausible character animation without noticeable foot-to-ground contact artifacts.

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“…This procedure can often be carried out using interpolation or extrapolation [4]. However, sequences contain relative misalignments, which cause artifacts such as footskating [55] when style translation is carried out without proper alignment. As a result, style translation can be used for evaluating warping methods.…”

Section: Style Translationmentioning

confidence: 99%

Correlation-optimized time warping for motion

Etemad

Arya

2014

Vis Comput

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Retrieval and comparative editing/modeling of motion data require temporal alignment. In other words, for such processes to perform accurately, critical features of motion sequences need to occur simultaneously. In this paper, we propose correlation-optimized time warping (CoTW) for aligning motion data. CoTW utilizes a correlation-based objective function for characterizing alignment. The method solves an optimization problem to determine the optimum warping degree for different segments of the sequence. Using segment-wise interpolated warping, smooth motion trajectories are achieved that can be readily used for animation. Our method allows for manual tuning of the parameters, resulting in high customizability with respect to the number of actions in a single sequence as well as spatial regions of interest within the character model. Moreover, measures are taken to reduce distortion caused by over-warping. The framework also allows for automatic selection of an optimum reference when multiple sequences are available. Experimental results demonstrate the very accurate performance of CoTW compared to other techniques such as dynamic time warping, derivative dynamic time warping and canonical time warping. The mentioned customization capabilities are also illustrated. Electronic supplementary materialThe online version of this article (

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Perceptual evaluation of footskate cleanup

Cited by 14 publications

References 19 publications

Modeling, Evaluation, and Scale on Artificial Pedestrians

Modeling, Evaluation, and Scale on Artificial Pedestrians

Human motion control with physically plausible foot contact models

Correlation-optimized time warping for motion

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