A Light Field Image Compression Method

Abstract

The invention discloses a light field image compression method, and belongs to the technical field of image compression. The light field image compression method disclosed by the invention comprises the following steps: carrying out rectangular partitioning on a light field sub-image array based on a set image group size to acquire a first kind of image groups; and for ungrouped light field sub-images, carrying out image group grouping based on adjacent grouped light field sub-images to acquire an a second kind of image groups consisting of the ungrouped light field sub-images and adjacent ungrouped light field sub-images of the ungrouped light field sub-images, wherein the sizes of the two kinds of image groups are the same; firstly carrying out encoding compression on the first kind of image groups, using center graphs of the image groups as reference frames, carrying out inter-frame encoding on the reference frames, and carrying out inter-frame prediction encoding on non-reference frames in the image groups by adopting the same encoding manner; and then carrying out the encoding compression on the second kind of image groups, and skipping the image groups that have been encoded in the first kind of image groups during the encoding. The light field image compression method disclosed by the invention is applied to light field image compression, and the image compression effect and the compression efficiency can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of light field image processing, and in particular relates to a method for compressing light field images in mixed prediction modes. Background technique [0002] The light field can comprehensively describe all the information in the light space, time domain, angle, etc., which will bring revolutionary changes to the traditional image processing methods. Unlike the light received by one pixel of a traditional camera, which is the result of the superposition of rays from different directions, the image captured by the light field acquisition device contains the angle information of the light, so the trajectory of the light at each point can be tracked. Light field images are widely used in scene depth calculation, high dynamic range image synthesis, motion blur removal of multiple images, medical imaging, collaborative detection and viewpoint synthesis, etc. [0003] The existing light field image acquisiti...

AI Technical Summary

Problems solved by technology

This algorithm only adopts the sequential reference structure, that is, the reference image of the target image is the previous light field sub-image adjacent to it in the sub-image sequential scanning sequence, and it does not consider the position of the light field sub-image in the light field sub-image set and other Parallax correlation of adjacent subimages in orientation and effect of group-of-picture size on compression performance

Moreover, the default single sequence reference prediction structure of video coding is used in the encoding process, and the reference frame structure is not optimized for the correlation between light field sub-images, resulting in insufficient compression of redundant information between light field sub-images

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