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Motion field estimation

A technology of sports field and reference frame, which is applied in the field of video processing and can solve problems such as large amount of calculation.

Inactive Publication Date: 2017-02-15
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, flow fusion based methods require an input set of basic motion fields to build various motion field candidates and an optimization function to select the best candidate which can be very complex and computationally intensive

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no. 1 example

[0075] For a first embodiment, a global processing method for a set of current frames of a video sequence is now described.

[0076] Let's focus on the trajectory along N+1 RGB images {In} n∈[0，...，N] The sequence estimate of , where Considered as a reference frame. From grid point start, and pass a set of reference displacement vectors derived from to define. These displacement vectors from pixels (the pixels they are assigned to) start and point to every other frame n of the sequence. In practice, assign to each displacement vector by pair The study of binary inconsistency values, to estimate the quality of. If one of these vectors is inconsistent, the process automatically adds a new reference frame at a time prior to the matching event and runs the process described above.

[0077] Let us assume that at I N before, more precisely at (fail 0 ≤N), for The estimation of the involved long-term intensive motion estimation fails. we propose in at (i....

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Abstract

The invention relates to a method, performed by a computer, for processing a video sequence comprising a reference frame, wherein, for each current frame of the video sequence, the method comprises determining a motion field between a current frame and a reference frame and a quality metric representative of the quality of the determined motion field from determined motion field. In the case where said quality metric is below a quality threshold, the method further comprises selecting a new reference frame among a group of previous current frames such that the quality metric of a previously generated motion field between the new reference frame and the reference frame is above the quality threshold, and iterating the determining of the motion field between current frame and reference frame by determining a motion field between current frame and new reference frame and concatenating the determined motion field between current frame and new reference frame with previously generated motion field between new reference frame and reference frame.

Description

technical field [0001] The present invention relates generally to the field of video processing. More precisely, the invention relates to a method and a device for generating a motion field of a video sequence with respect to a reference frame. Background technique [0002] This section is intended to introduce the reader to various aspects of technology, which may be related to various aspects of the present invention that are described and / or claimed below. It is believed that this discussion helps to provide the reader with background information to better understand various aspects of the invention. Accordingly, it should be understood that these statements are to be read in this light, and not as admissions of prior art. [0003] In the field of video editing applications, methods are known for editing a reference frame selected by an operator in a video sequence and for propagating information from the reference frame to subsequent frames. The choice of reference fr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/105H04N19/139H04N19/172H04N19/58H04N19/513G06T7/00G06T7/20
CPCH04N19/105H04N19/139H04N19/172H04N19/521H04N19/58G06T7/0002G06T2207/30168G06T2207/10016G06T2207/10024H04N19/154G06T7/246
Inventor P.罗伯特T.E.克里韦利P-H.康泽
Owner THOMSON LICENSING SA