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Light field image compression method based on hybrid scan order

A light field image and hybrid scanning technology, which is applied in image communication, digital video signal modification, electrical components, etc., can solve the problems of low coding efficiency and high computational complexity, and achieve the effect of improving coding effect and high similarity

Active Publication Date: 2019-10-25
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

Therefore, the direct application of MVC coding technology on natural light field images has the problem of high computational complexity, and the coding efficiency is low due to the generation of a large amount of header information.

Method used

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  • Light field image compression method based on hybrid scan order
  • Light field image compression method based on hybrid scan order
  • Light field image compression method based on hybrid scan order

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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] figure 1 The flow chart of the light field image compression method based on the mixed scanning sequence provided by the embodiment of the present invention, as shown in figure 1 As shown, it mainly includes the following steps:

[0023] Step 11. Decompose the light field image into a two-dimensional perspective map array.

[0024] A light field image is composed of macro-pixels, and each macro-pixel can be regarded as a sample of the main...

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Abstract

The invention discloses a light-field image compression method based on a hybrid scanning sequence. The light-field image compression method comprises the following steps of: decomposing a light-field image into a two-dimensional view image array; for an irregular area in the two-dimensional view image array, using a transverse zigzag scanning mode, and, for a regular area in the two-dimensional view image array, using a U-shaped scanning mode, so that the two-dimensional view image array is synthesized into a pseudo video sequence; and performing compression coding of the pseudo video sequence by utilizing a standard video coder in a video inter-frame coding and / or intra-frame coding mode. By means of the scheme in the invention, the light-field image is decomposed into a video; the advantage that high-efficiency compression coding of the light-field image is carried out by utilization of information redundancy between view images is sufficiently explored; according to the view image arrangement mode obtained by practical shooting, a specific hybrid scanning mode is designed; therefore, the similarity between adjacent frames in the pseudo video sequence is relatively high; and thus, the coding effect is further improved.

Description

technical field [0001] The invention relates to the technical field of light field image compression, in particular to a method for compressing light field images based on mixed scanning order. 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 traditio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/129H04N19/107H04N19/176
CPCH04N19/107H04N19/129H04N19/176
Inventor 陈志波赵盛洋杨昆黄宏睿
Owner UNIV OF SCI & TECH OF CHINA
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