Abstract
Traditionally, frame rate up conversion can be realized by either bidirectional
or unidirectional approaches. Bidirectional approach suffers from motion ambiguity.
However, unlike unidirectional approach, bidirectional approach does not suffer
from holes and occluded regions. In this article, the particle-based frame
rate up conversion algorithm is proposed by combining hierarchical motion
vector field construction stage and particle-based motion trajectory calibration
stage. First of all, color-oriented adaptive cost function is applied in the
hierarchical motion vector field construction stage to retrieve initial motion
vectors. Second, the retrieved motion vectors are memorized and calibrated
by minimizing the distance between interpolated block and particle trajectory
intersecting points. Besides the minimization, joint cost-function evaluation
further prevents untrue motion vectors from being selected. According to the
experiment results, proposed pixel-based frame rate up conversion outperforms
existing works by 0.9–3.9 dB. On the other hand, the computation complexity
of proposed work is less than existing bilateral approaches by 5–100,
while it is larger than the unidirectional approach by 3–100, according
to the target video resolution. This concludes a high visual quality frame
rate up conversion design.
© 2012 IEEE
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