MCFI-based animation tweening algorithm for 2D parametric motion flow/optical flow

Authors:
Thanakorn Sakchaicharoenkul
Affiliations:
CSIM, SAT, Asian Institute of Technology, Pathumthani, Thailand and Department of Computer Science, Faculty of Science and Technology, Thammasat University, Klong Luang, Pathumthani, Thailand
Venue:
Machine Graphics & Vision International Journal
Year:
2006

Citing 6
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Accuracy vs efficiency trade-offs in optical flow algorithms

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Monocular Optical Flow for Real-Time Vision Systems

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Synergism in Low Level Vision

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Real-Time Optical Flow

Real-Time Optical Flow

Frame rate up-conversion using region-based optical flow

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Abstract

In hand drawn animation, some of the animations are created at very low frame rates (12 frames per second) because of a limited budget. A simple technique for increasing frame rates is animation tweening. In fact, most animation tweening applications process only vector-based objects. Further, there is no algorithm which can automatically define extensive modelling and animation of 3D objects for the animation tweening process. In this work, a raster-based animation tweening algorithm which does not require extensive modelling and animation of 3D objects is presented. The algorithm is based on motion-compensated frame rate up-conversion (MC-FRC), whose performance depends heavily on motion estimation (ME). A more accurate flow field, which is a combination of 2D parametric motion flow field and optical flow field, is developed. The results obtained for various types of hand drawn animation scenes are illustrated. The experimental results show that higher quality in-between frames can be obtained by the proposed algorithm.