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

Abstract

The invention discloses an optical field focus stack image sequence encoding and decoding method, device and system, and aims to simulate out-of-focus blur regions of other frames by performing Gaussian filtering on a focusing region since each frame of a focus stack image has great correlation and only the focusing region is different from the out-of-focus blur region. According to the invention,the prediction motion vector candidate list is traversed; taking the position pointed by the prediction motion vector with the minimum distortion cost as a starting point; carrying out integer pixelsearch and cascaded sub-pixel search in sequence; gaussian filtering is carried out on each matching block in the searching process; the rate distortion cost of the matching blocks before and after Gaussian filtering is compared, the optimal matching block of the matching block with low rate distortion cost is selected, Gaussian filtering is applied to the inter-frame prediction model, residual distribution of the prediction unit and the coding unit is effectively reduced, the code rate is effectively saved, 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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