Reliability estimation of temporal noise estimation
AssigneeSamsung Electronics Co., Ltd.
InventorsZhi Zhou, Yeong-Taeg Kim
Life of this patent
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Abstract
A method for reliability estimation of temporal noise estimation in a sequence of video frames. The temporal local differences from a difference between a previous frame and a next frame in the sequence of frames is determined. A distribution of the temporal local difference is determined. Characteristics values of the distribution are determined. The characteristics values are compared to the thresholds to obtain an indication of the reliability of the temporal noise estimation. If the estimated noise variance is determined as not reliable, it will be discarded and the previous estimated reliable noise variance will be used instead indicating the noise level of the current frame.
Claims18
A method for reliability estimation of temporal noise estimation in a sequence of video frames, comprising the steps of:
- obtaining temporal local differences from the difference between a previous frame and a next frame in the sequence of frames;
- determining a distribution of the temporal local difference;
- determining characteristic values of the distribution;
- and
- comparing the characteristic values to one or more thresholds to obtain an indication of the reliability of the temporal noise estimation.
A method for reliability estimation of temporal noise estimation in a sequence of video frames, comprising the steps of:
- determining a plurality of reliability estimates;
- and
- combining the plurality of reliability estimations to generate a combined reliability estimate.
A reliability estimator for determining reliability estimation of temporal noise estimation in a sequence of video frames, comprising:
- a differencing means that determines the temporal local differences from the difference between a previous frame and a next frame in the sequence of frames;
- a distribution calculator that determines a distribution of the temporal local difference;
- a characteristic value calculator that determines statistical characteristic values of the distribution;
- and
- a reliability detector that compares the characteristics values to one or more thresholds to obtain an indication of the reliability of the temporal noise estimation.
A reliability estimation system that determined reliability estimation of temporal noise estimation in a sequence of video frames, comprising:
- a plurality of reliability estimators, wherein each reliability estimator determines a reliability estimate;
- and
- a combiner that combines the reliability estimations from the reliability estimators to generate a combined reliability estimate.
Dependencies are inferred from the claim text.