Sketching human character animations by composing sequences from large motion database

Yoo, Innfarn; Vanek, J.; Nizovtseva, Maria; Adamo-Villani, Nicoletta; Beneš, Bedřich

doi:10.1007/s00371-013-0797-1

Cited by 20 publications

(10 citation statements)

References 22 publications

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“…[HSCY13] proposed a framework that conserves the topology of the synthesizing postures; using Gauss linking integral (GLI), they avoid body part penetration by distinguishing topologically different postures, thus reducing the processing time required to search for data in the motion database. There is an ongoing effort, looking for efficient methods to establish temporal coherence and continuity in the generated motion [SH12, YVN*14, HMC*15].…”

Section: Data‐driven Inverse Kinematicsmentioning

confidence: 99%

Inverse Kinematics Techniques in Computer Graphics: A Survey

Aristidou

Lasenby

Chrysanthou

et al. 2017

Computer Graphics Forum

181

103

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Inverse kinematics (IK) is the use of kinematic equations to determine the joint parameters of a manipulator so that the end effector moves to a desired position; IK can be applied in many areas, including robotics, engineering, computer graphics and video games. In this survey, we present a comprehensive review of the IK problem and the solutions developed over the years from the computer graphics point of view. The paper starts with the definition of forward and IK, their mathematical formulations and explains how to distinguish the unsolvable cases, indicating when a solution is available. The IK literature in this report is divided into four main categories: the analytical, the numerical, the data‐driven and the hybrid methods. A timeline illustrating key methods is presented, explaining how the IK approaches have progressed over the years. The most popular IK methods are discussed with regard to their performance, computational cost and the smoothness of their resulting postures, while we suggest which IK family of solvers is best suited for particular problems. Finally, we indicate the limitations of the current IK methodologies and propose future research directions.

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Section: Data‐driven Inverse Kinematicsmentioning

confidence: 99%

Inverse Kinematics Techniques in Computer Graphics: A Survey

Aristidou

Lasenby

Chrysanthou

et al. 2017

Computer Graphics Forum

181

103

View full text Add to dashboard Cite

show abstract

“…Sketch is also used for facial expressions by Lau [19] and Seol [20]. In computer animation, sketch also has been successfully used in motion synthesis, motion retrieval and posture design [21][22][23][24][25][26][27]14].…”

Section: Related Workmentioning

confidence: 99%

“…Different from the other kind of input, using a 2D sketch brings in the following benefits: intuitiveness, fast posture definition, quick production of sample and first-pass animated scenes [14]. In light of this, we also utilize the sketch interface to retrieve human motion from database in this paper.…”

Section: Introductionmentioning

confidence: 98%

Sketch-based human motion retrieval via selected 2D geometric posture descriptor

et al. 2015

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a b s t r a c tSketch-based human motion retrieval is a hot topic in computer animation in recent years. In this paper, we present a novel sketch-based human motion retrieval method via selected 2-dimensional (2D) Geometric Posture Descriptor (2GPD). Specially, we firstly propose a rich 2D pose feature call 2D Geometric Posture Descriptor (2GPD), which is effective in encoding the 2D posture similarity by exploiting the geometric relationships among different human body parts. Since the original 2GPD is of high dimension and redundant, a semi-supervised feature selection algorithm derived from Laplacian Score is then adopted to select the most discriminative feature component of 2GPD as feature representation, and we call it as selected 2GPD. Finally, a posture-by-posture motion retrieval algorithm is used to retrieve a motion sequence by sketching several key postures. Experimental results on CMU human motion database demonstrate the effectiveness of our proposed approach.

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“…Yoo et al . avoided this problem by projecting the same pose onto eight different angled planes and then comparing all of them with the user input sketch .…”

Section: Related Workmentioning

confidence: 99%

Points‐based user interface for character posing

Choi

Lee

2016

Computer Animation & Virtual

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We present a points-based user interface for character posing. In our method, users insert a number of three-dimensional (3D) points in a virtual environment. The system performs a linear search of a motion capture database for the best matched pose and then places the pose immediately in the virtual environment to be overlapped with the input points. For a fast and precise distance computation between the input points and the example poses from the database, we developed a closed-form solution of the 3D points registration problem. To demonstrate the easiness and usability of our approach, we built a motion database including various kinds of human motion and conducted a user study of character posing tasks with non-expert users.

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Sketching human character animations by composing sequences from large motion database

Cited by 20 publications

References 22 publications

Inverse Kinematics Techniques in Computer Graphics: A Survey

Inverse Kinematics Techniques in Computer Graphics: A Survey

Sketch-based human motion retrieval via selected 2D geometric posture descriptor

Points‐based user interface for character posing

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