R. Castagno et al., A METHOD FOR MOTION-ADAPTIVE FRAME RATE UP-CONVERSION, IEEE transactions on circuits and systems for video technology, 6(5), 1996, pp. 436-446
A frame interpolation algorithm for frame rate up-conversion of progre
ssive image sequences is proposed. The algorithm is based on simple mo
tion compensation and linear interpolation, A motion vector is searche
d for each pixel in the interpolated image and the resulting motion fi
eld is median filtered to remove inconsistent vectors, Averaging along
the motion trajectory is used to produce the interpolated pixel value
s, The main novelty of the proposed method is the motion compensation
algorithm which has been designed with low computational complexity as
an important criterion. Subsampled blocks are used in block matching
and the vector search range is constrained to the most likely motion v
ectors, Simulation results show that good visual quality has been obta
ined with moderate complexity, The algorithm has been designed mainly
for 50 Hz to 75 Hz frame rate up-conversion with applications in a mul
timedia environment, but it can also be used in advanced television re
ceivers to remove artifacts due to low scan rate.