A light field focus stack image sequence encoding and decoding method, device and system

Abstract

The invention discloses a light field focus stack image sequence encoding and decoding method, device and system. Since there is a great correlation between each frame of the focus stack image, only the in-focus area and the out-of-focus blur area are different between each frame. By applying Gaussian filtering to the in-focus area, the out-of-focus blurred areas of other frames can be simulated. The present invention traverses the predicted motion vector candidate list, takes the position indicated by the predicted motion vector with the smallest distortion cost as the starting point, sequentially performs integer pixel search and cascaded sub-pixel search, and performs a search for each matching block in the search process. Gaussian filtering, compare the rate-distortion cost of the matching block before and after Gaussian filtering, select the optimal matching block with a smaller rate-distortion cost, apply Gaussian filtering to the inter-frame prediction model, effectively reduce the prediction unit and The residual distribution of the coding unit effectively saves the code rate and the coding efficiency is high.

Description

technical field [0001] The present invention belongs to the technical fields of intersecting stereo vision and video encoding, and more particularly relates to a method, device and system for encoding and decoding light field focus stack image sequences. Background technique [0002] The light field focus stack image sequence is a set of two-dimensional images focused at different depths, which contains rich three-dimensional information and is widely used in refocusing, depth of field extension, and three-dimensional display. Due to dense sampling and negligible parallax, there are A large amount of space redundancy requires further compression to eliminate redundancy. The focus stack image sequence of the light field is quite different from the ordinary image sequence. The focus area between frames of the ordinary image sequence is roughly the same, but the focus stack image sequence is different in the focus area and the out-of-focus area of ​​the scene. Most of the exis...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a light field focus stack image sequence encoding and decoding method, device and system, the purpose of which is to solve the problem that the prior art does not take into account the high correlation between images The problem of low coding efficiency caused by

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