Light Field Image Compression Method Based on Linear Reconstruction

A technology of light field image and compression method, which is applied in the direction of image communication, digital video signal modification, electrical components, etc., can solve the problems of long decoding time, high complexity, and large amount of data, so as to reduce the amount of encoded data and reduce encoding Complexity, the effect of reducing encoded data

Active Publication Date: 2020-03-31
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

Due to the high dimensionality of the light field and the large amount of data, this method has the disadvantages of high complexity and long decoding time

Method used

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  • Light Field Image Compression Method Based on Linear Reconstruction
  • Light Field Image Compression Method Based on Linear Reconstruction
  • Light Field Image Compression Method Based on Linear Reconstruction

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Embodiment Construction

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0022] An embodiment of the present invention provides a method for compressing light field images based on linear reconstruction, which uses the characteristics of light field images based on microlens arrays to design an efficient compression scheme to support storage and transmission of light field images. The principle is as follows:

[0023] The light field image is composed of macro-pixel arrays, and each macro-pixel is actually a pixel block...

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Abstract

The invention discloses a light-field image compression method based on linear reconstruction. The light-field image compression method comprises the steps of decomposing a light-field image into viewing angle image arrays and then dividing into A and B sets; at an encoding end, performing compression on viewing angle images in the A set by adopting a first video encoder, transmitting a code stream to a video decoder at the encoding end and a video decoder at a decoding end, obtaining a relationship between viewing angle images in the B set and the viewing angle images in the A set by combining the viewing angle images in the B set with viewing angle images reconstructed by the video decoder at the encoding end in the A set and utilizing a linear reconstruction theory of light-field viewing angle images, and transmitting the relationship to a second video decoder at the decoding end; at the decoding end, reconstructing the B set by utilizing the linear reconstruction theory of the light-field viewing angle images and combining with decoding results of the first and second video decoders at the decoding end; and re-forming the light-field image by utilizing the reconstructed A set and B set. According to the method, encoding data at the encoding end can be greatly reduced, and are reconstructed at the decoding end with a relatively good quality.

Description

technical field [0001] The invention relates to the technical field of light field image compression, in particular to a linear reconstruction-based light field image compression method. Background technique [0002] The light field camera can record the light intensity and direction information (ie light field information) in the space scene. Inside a light-field camera, a microlens array is placed in front of the CCD sensor, near the focal length of the main lens. Each microlens corresponds to a pixel block (ie, macropixel), and the light field image consists of N*M macropixels, where N and M are the height and width of the microlens array, respectively. If each microlens is regarded as a small hole, the back of the main lens forms an inverted image on each macro pixel—that is, each macro pixel can be regarded as a sampling of the main lens in a specific direction. [0003] Under the same spatial resolution, the amount of data is hundreds of times that of traditional 2D ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/176H04N19/44H04N19/70H04N19/85
CPCH04N19/176H04N19/44H04N19/70H04N19/85
Inventor 陈志波赵盛洋
Owner UNIV OF SCI & TECH OF CHINA
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