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Spatial depth extraction method based on light field information

A technique for spatial depth, extraction methods, used in computer vision and computational photography

Active Publication Date: 2016-12-28
ZHEJIANG UNIV
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Problems solved by technology

[0005] In order to solve the problems of time complexity and calculation accuracy faced by the spatial depth extraction method based on function optimization, the present invention combines the light field information to propose a spatial depth extraction method, which extracts the spatial depth of the entire image through one calculation, without iterative calculation

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Embodiment Construction

[0034] The method of the present invention will now be described in detail in conjunction with specific embodiments and accompanying drawings.

[0035] like figure 1 As shown, the steps of spatial depth extraction based on light field information are as follows:

[0036] (1) Spatial depth calculation of image edge components at the reference viewpoint

[0037] The reference viewpoint for the selected 4D light field data. The information recorded by light field imaging is four-dimensional data, and its data recording principle is shown in Figure 2. For an image I(x,y), at different positions (x,y) of the image through different viewpoints (u,v) Recording, the four-dimensional light field data R(u, v, x, y) can be obtained, and R(u, v, x, y) is the light brightness of the point (u, v, x, y).

[0038] The present invention is not limited to the acquisition method of light field information, and the method of the present invention can realize the extraction of spatial depth for...

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Abstract

The invention discloses a spatial depth extraction method based on light field information. The method comprises the following steps that step 1, a reference view point is selected in four-dimensional light field data, and the spatial depth of the image edge component of the reference view point is calculated; step 2, area segmentation operation is performed on the image of the reference view point, and the image is segmented into multiple areas according to the color or brightness uniformity; and step 3, the spatial depth of all the segmented area edges is corrected, and interpolation operation is performed on the spatial depth of the central part of the area according to the corrected spatial depth. The problems of difficult description function selection and uncertain operation time of a spatial depth description function optimization method can be avoided through the method of taboo search, area segmentation and depth interpolation, etc. so that rapid and accurate operation of spatial depth extraction can be realized.

Description

technical field [0001] The invention relates to the fields of computer vision and computational photography, in particular to a spatial depth extraction method based on light field information. Background technique [0002] The information acquisition of light field imaging belongs to the field of computational photography, and the extraction of spatial depth belongs to the field of computer vision. The idea of ​​recording light fields was first proposed by Gabriel Lippmann in a 1908 Latin treatise. In 1996, M.Levoy and P.Hanrahan proposed the light field rendering theory, and reduced the plenoptic function to four dimensions, and called it the light field function. There are two ways to collect light field information, one is the form of traditional camera plus microlens array, and the other is the form of arranging several cameras into an array. The two methods achieve the same goal by different routes, and both can obtain the sampling of light field information. Compar...

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Application Information

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IPC IPC(8): G06T7/00
CPCG06T2207/10028
Inventor 李晓彤马壮岑兆丰兰顺陈灏
Owner ZHEJIANG UNIV
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