FRAME RATE CONVERSION METHOD SUPPORTING FRAME INTERPOLATION REPLACEMENT WITH MOTION COMPENSATION BY LINEAR FRAME COMBINATION AND DEVICE IMPLEMENTING IT Russian patent published in 2022 - IPC G06T7/20 H04N19/51 

FIELD: video frame rate conversion.

SUBSTANCE: invention relates to a method and user device for frame rate conversion (FRC) video. The method comprises obtaining at least one pair of video frames to be FRC-transformed; dividing each frame into a plurality of blocks; estimating motion between frames on a block-by-block basis to obtain: a forward motion field, which is a set of motion vectors, each of which corresponds to a corresponding block of the plurality of blocks of the first frame and points to a corresponding area in the second frame, and a backward motion field, which is a set of motion vectors , each corresponding to a corresponding block of the plurality of blocks of the second frame and pointing to a corresponding region in said first frame, each motion vector being assigned a corresponding motion estimation metric value, with the first frame preceding the second frame in time; deriving closing occlusions, opening occlusions, and indeterminate occlusions based on a forward motion field and a backward motion field; calculating an artifact occurrence probability score indicative of a probability of occurrence of the artifact when interpolating the motion-compensated frame between the first frame and the second frame, the calculation comprising detecting discontinuities between spatially adjacent motion vectors in at least one of the forward motion field and the backward motion field; discontinuity processing that suppresses discontinuities that only overlap with opening occlusions for discontinuities in the backward motion field or only with closing occlusions for discontinuities in the forward motion field, and reinforces discontinuities that overlap with undefined occlusions; and suppressing discontinuities between spatially adjacent motion vectors based on motion estimation metric values; performing smoothing filtering to estimate the probability of artifact occurrence; and obtaining one or more intermediate frames, taking into account the values of the smoothed estimate of the probability of occurrence of the artifact.

EFFECT: increasing the accuracy of detecting possible artifacts.

19 cl, 15 dwg