Full-body performance animation with Sequential Inverse Kinematics

Unzueta, Luis; Peinado, Manuel; Boulic, Ronan; Suescun, Ángel

doi:10.1016/j.gmod.2008.03.002

Cited by 42 publications

(33 citation statements)

References 41 publications

(68 reference statements)

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“…Tolani et al describe a position and orientation control of the limbs [TGB00] with a special focus on the control of the swivel angle along the direction linking the limb root to the controlled effector (visible as a dotted line in Figure 1a). Kulpa [UPBS08]. Despite their low computational cost analytical solutions often suffer from temporary instability.…”

Section: Background In Full Body 3d Interactionsmentioning

confidence: 99%

Integrated Analytic and Linearized Inverse Kinematics for Precise Full Body Interactions

Boulic

Raunhardt

2009

Motion in Games

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Abstract.Despite the large success of games grounded on movement-based interactions the current state of full body motion capture technologies still prevents the exploitation of precise interactions with complex environments. This paper focuses on ensuring a precise spatial correspondence between the user and the avatar. We build upon our past effort in human postural control with a Prioritized Inverse Kinematics framework. One of its key advantage is to ease the dynamic combination of postural and collision avoidance constraints. However its reliance on a linearized approximation of the problem makes it vulnerable to the well-known full extension singularity of the limbs. In such context the tracking performance is reduced and/or less believable intermediate postural solutions are produced. We address this issue by introducing a new type of analytic constraint that smoothly integrates within the prioritized Inverse Kinematics framework. The paper first recalls the background of full body 3D interactions and the advantages and drawbacks of the linearized IK solution. Then the FlexionEXTension constraint (FLEXT in short) is introduced for the partial position control of limb-like articulated structures. Comparative results illustrate the interest of this new type of integrated analytical and linearized IK control.

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Section: Background In Full Body 3d Interactionsmentioning

confidence: 99%

Integrated Analytic and Linearized Inverse Kinematics for Precise Full Body Interactions

Boulic

Raunhardt

2009

Motion in Games

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“…Many numerical optimization based IK solvers have been used to find solutions for the full degrees of freedom of a character [2][3][4]33]. Some used the idea of damped least squares for robustly solving inverse kinematics in a near singular condition.…”

Section: Previous Workmentioning

confidence: 99%

Adaptive locomotion on slopes and stairs using pelvic rotation

2015

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In this paper, we introduce a new online motion retargeting technique to generate natural locomotion of walking on slopes and stairs using only a single captured reference motion. An inverse-kinematics solver is developed to generate poses satisfying smooth trajectories of positional and rotational constraints for feet and hands. By considering the rotations of the pelvis and upper body, our technique is able to produce natural poses without knee-popping artifacts.

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“…Pose changes are computed using the IK procedure proposed in [14]. In this approach, five kinematic chains are defined, all of them including the body segments linked with the involved posing features.…”

Section: Reconstruction Of the 3d Posesmentioning

confidence: 99%

Capturing the Sporting Heroes of Our Past by Extracting 3D Movements from Legacy Video Content

Goenetxea

Unzueta

Linaza

et al. 2014

Digital Heritage. Progress in Cultural Heritage: Documentation, Preservation, and Protection

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Sports are a key part of cultural identity, and it is necessary to preserve them as important intangible Cultural Heritage, especially the human motion techniques specific to individual sports. In this paper we present a method for extracting 3D athlete motion from video broadcast sources, providing an important tool for preserving the heritage represented by these movements. Broadcast videos include camera motion, multiple player interaction, occlusions and noise, presenting significant challenges to solve the reconstruction. The approach requires initial definition of some key-frames and setting of 2D key-points in those frames manually. Thereafter an automatic process estimates the poses and positions of the players in the key-frames, and in the frames between key-frames, taking into account collisions with the environment and human kinematic constraints. Initial results are extremely promising and this data could be used to analyze the sport's evolution over time, or even to generate animations for interactive applications.

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Full-body performance animation with Sequential Inverse Kinematics

Cited by 42 publications

References 41 publications

Integrated Analytic and Linearized Inverse Kinematics for Precise Full Body Interactions

Integrated Analytic and Linearized Inverse Kinematics for Precise Full Body Interactions

Adaptive locomotion on slopes and stairs using pelvic rotation

Capturing the Sporting Heroes of Our Past by Extracting 3D Movements from Legacy Video Content

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