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4D light field full-focus image acquisition method based on angle information

An all-focus image and acquisition method technology, applied in the field of 4D light field all-focus image acquisition based on angle information, can solve problems such as neglect

Pending Publication Date: 2021-04-20
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Claims
  • Application Information

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Problems solved by technology

Therefore, the fusion process only uses the spatial information (x, y) of the light field to establish the focus degree evaluation function, and ignores the relationship between the 4D light field angle information (u, v) and the focus degree of the integral image.

Method used

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  • 4D light field full-focus image acquisition method based on angle information
  • 4D light field full-focus image acquisition method based on angle information
  • 4D light field full-focus image acquisition method based on angle information

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Embodiment Construction

[0056] In order to make the purpose, features and advantages of the present invention understandable, the specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0057] Such as figure 1 As shown, the data processing flow of the present invention based on the all-focus image fusion algorithm of 4D square angle information is: from light field original picture I raw (i, j) decoding to get 4D light field matrix L(x, y, u, v), 4D light field matrix through coordinate transformation to get a new 4D light field focused at different scene depths Calculate each 4D light field matrix The macropixel energy difference value of Get the weight matrix after comparison The weighted average of each weight matrix and the corresponding 4D light field matrix is ​​obtained to obtain the fused 4D light field Further use of central sub-aperture image for 4D light field Conduct guided filtering optimizatio...

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Abstract

The invention belongs to the field of full-focus image fusion algorithms, and particularly discloses a 4D light field full-focus image acquisition method based on angle information, which analyzes a 4D light field from another angle. According to the method, a macro pixel energy difference function is established based on light field angle information to perform definition evaluation, and fusion is performed based on 4D light field; finally, the fused 4D light field data is guided and optimized by using the central sub-aperture image after dimension raising, and experiments show that compared with a traditional full-focus image fusion algorithm based on spatial information, the full-focus image obtained by the method is better in visual effect, and quantitative evaluation shows that the quality of the full-focus image obtained through the method is improved under the evaluation index based on image features and the evaluation index based on human perception heuristics.

Description

technical field [0001] The invention belongs to the field of all-focus image fusion algorithms, in particular to a 4D light field all-focus image acquisition method based on angle information. Background technique [0002] The traditional all-focus image acquisition algorithm is based on multiple local clear images obtained by camera focusing and multiple exposures, then evaluates the image sharpness based on pixels or regions, establishes fusion rules based on the sharpness value, and finally obtains full focus image. When traditional cameras acquire multi-focus images, due to factors such as mechanical shake and scene changes, the matching degree between multi-focus images is reduced. The light field camera has the characteristic of taking pictures first and then focusing, and can obtain highly matched multi-focus images, which makes it have a significant advantage in the acquisition of all-focus images. [0003] When performing all-focus image fusion based on light fiel...

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Application Information

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IPC IPC(8): G06T5/10G06T5/50G06K9/32G06K9/62
Inventor 武迎春赵志浩李晋红赵贤凌王安红
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY