Light field full-focus image fusion method based on edge enhancement guided filtering

An all-focus image and guided filtering technology, which is applied in the field of image processing, can solve the problems of edge information loss of refocused images and reduce the fusion accuracy of all-focus images.
CN110648302AActive Publication Date: 2020-01-03TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
Publication Date
2020-01-03

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Abstract

The invention belongs to the technical field of image processing. According to the specific technical scheme, the method comprises the steps that aplurality of refocusing images obtained through digital refocusing of a light field is subjected to multi-scale decomposition, and a feature layer decision diagram guides filtering optimization to obtain a final full-focusing image. Edge information loss caused by 4D light field calibration errors is compensated; in a refocusing image multi-scale decomposition process, extraction of an edge layer is added to realize image high-frequency informationenhancement. A multi-scale image evaluation model is established to achieve edge layer guided filtering parameter optimization, a light field full-focus image with higher quality can be obtained, andon the premise that the similarity between the full-focus image and an original image is not obviously reduced, the method can enable the image perception definition of the full-focus image to be averagely improved by 18.4%.
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Description

technical field

[0001] The invention belongs to the technical field of image processing, and in particular relates to a light field all-focus image fusion method based on edge enhancement guided filtering. Background technique

[0002] All-focus image fusion refers to the fusion of multiple locally focused images at different depths of the same scene into a clear overall focused image, so that it has more complete spatial information. The full-focus fusion of traditional images is based on multi-focus images obtained by multiple camera focusing. During the focusing process, changes in the imaging geometric relationship and mechanical jitter will cause changes in the size and viewpoint position of objects in the captured images at different times. The robustness requirements of image fusion methods are higher. The light field camera can obtain multiple refocused images through digital refocusing technology after a single exposure, which does not involve the limitation of sce...

Claims

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