Method for generating full-focus image of light field based on depth map

An all-focus image and depth map technology, applied in image enhancement, image analysis, image communication, etc., can solve problems such as block effect and edge effect

Active Publication Date: 2018-05-04
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

[0004] The present invention overcomes the deficiencies in the prior art, and solves the problem of block effect and edge effect when the traditional all-focus image is generated by using algorithms such as DCT and wavelet transform to achieve multi-image fusion, and aims to p

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  • Method for generating full-focus image of light field based on depth map
  • Method for generating full-focus image of light field based on depth map
  • Method for generating full-focus image of light field based on depth map

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Embodiment Construction

[0040] In order to make the objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0041] In order to better understand the present invention, the principle of generating a light field all-focus image based on a depth map is briefly described below.

[0042] Such as figure 1 As shown, the basic idea of ​​generating an all-focus image is to find the focus areas of different defocused images, stitch and fuse different focus areas, and obtain an all-focus image. This patent uses the defocused image obtained by the light field camera to generate an all-focus image. The key technology is to combine the advantages of the light field camera that can calculate the depth, and determine the focus area of ​​each defocused image according to the depth map.

[0043] The image generation method of this patent is introduced in detail be...

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Abstract

The invention discloses a method for generating a full-focus image of a light field based on a depth map, belongs to the field of light field imaging, and solves a problem that a block effect and an edge effect exist in multi-image fusion realized by adopting an algorithm such as DCT and wavelet transform in a traditional full-focus image generation process. The method adopts a defocusing image obtained by a light field camera to generate the full-focus image, and specifically comprises the following steps of (1) micro-lens calibration; (2) 4D light field acquisition; (3) digital refocusing; (4) depth acquisition and (5) full-focus image generation. The method has the advantages that the limitation of a fusion algorithm in the traditional full-focus image generation process is avoided, a focusing area of the defocusing image can be accurately found out to carry out full-focus image generation, and meanwhile, the method is superior to the wavelet transform and the DCT transform on the block effect and the edge effect.

Description

technical field [0001] The invention belongs to the field of light field imaging, in particular to a method for generating a light field all-focus image based on a depth map. Background technique [0002] Due to the limitation of the depth of field, traditional cameras can only obtain a focused photo of a partial scene in one shot. To obtain a fully-focused photo of the entire scene in the camera's view, it is necessary to gradually manually zoom to obtain defocused photos of different depth levels. The defocusing method is used to obtain the all-in-focus image through multi-image fusion. Defocusing methods to generate all-in-focus images are mainly divided into two categories: one is to perform scale transformation in the transform domain, such as DCT transform, wavelet transform, etc. The other is to use spatial pixels for all-focus image generation, such as principal component analysis method, weighted average method, etc. [0003] The rise of light field imaging techno...

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Application Information

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IPC IPC(8): H04N5/232G06T7/80
CPCG06T7/80G06T2207/10052H04N23/67
Inventor 王安红潘磊武迎春李东红赵贤凌
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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