Light field matting method and device based on air angle consistency

A consistent, empty angle technology, applied in image analysis, image data processing, instruments, etc., can solve problems such as multiple redundant calculations, difficulties in meeting downstream technologies and applications, and inability to maintain the consistency of light field data empty angles

Inactive Publication Date: 2022-07-12
BEIJING INFORMATION SCI & TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sub-aperture image operation method does not consider the connection between different sub-aperture images, and cannot maintain the consistency of the empty angle of the light field data, and the obtained results are difficult to meet the requirements of downstream technologies and applications
In addition, the size of the light field data is large, and there is a lot of redundant information between the sub-aperture images. The simple sub-aperture image processing has too many redundant calculations, and the efficiency is too low.

Method used

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  • Light field matting method and device based on air angle consistency
  • Light field matting method and device based on air angle consistency
  • Light field matting method and device based on air angle consistency

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Embodiment Construction

[0068] In the drawings, the same or similar reference numerals are used to denote the same or similar elements or elements having the same or similar functions. The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0069] like figure 1 and figure 2 As shown, the method for evaluating light field matting based on void angle consistency provided by the embodiment of the present invention includes:

[0070] Step 1, extract the central sub-aperture image of the light field data.

[0071] Step 2: Calculate the disparity map of the light field data and the alpha map of the sub-aperture image in the center of the light field data.

[0072] Step 3: Propagating the alpha map of the central sub-aperture image to obtain the alpha map of the light field.

[0073] step 4, as Figure 5 As shown in a, because the spectrogram of the light field data satisfies the shape of the hypercone, the angular consistency of the li...

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Abstract

The invention discloses a light field matting evaluation method and device based on air angle consistency. The method comprises the following steps: step 1, extracting a central sub-aperture image of light field data; 2, calculating a disparity map of the light field data and a light field data center sub-aperture image alpha map; 3, propagating the alpha image of the central sub-aperture image to obtain a light field alpha image; and step 4, evaluating the air angle consistency in the light field alpha diagram through an air angle consistency evaluation index F-cons obtained in a frequency domain: when the value range of the index F-cons is (0-1), the larger the index F-cons is, the smaller the occupied range of the representative branch set is, and the better the air angle consistency of the light field data is, otherwise, the worse the air angle consistency is. By adopting the method provided by the invention, accurate and consistent light field matting can be realized, and the air angle consistency of the light field matting can be evaluated.

Description

technical field [0001] The present invention relates to the technical field of optical information processing, in particular to a method and device for optical field matting based on void angle consistency. Background technique [0002] Light field describes the distribution of light in free space. Light field data captures the radiation of light from all directions, and records the spatial information, angle information and intensity information of light. Light field imaging can capture richer visual information, making up for traditional photography. The angle information that is lost in the simulation provides stronger capabilities for scene understanding and improves the performance of traditional computer vision problems. [0003] A 4D light field data can be represented by a 2D sub-aperture image array, so the 2D image matting algorithm by sub-aperture image can be regarded as realizing the matting of 4D light field data to a certain extent. The method of sub-aperture...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/11G06T7/194G06T7/50
CPCG06T7/11G06T7/194G06T7/50G06T2207/10052
Inventor 刘畅何迪刘天艺邱钧
Owner BEIJING INFORMATION SCI & TECH UNIV
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