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Multi-focus image fusion method based on depth information extraction

A multi-focus image and depth information technology, applied in the field of multi-focus image fusion based on depth information extraction, can solve problems such as artificial effects, false contours at image edges, and pseudo-Gibbs

Inactive Publication Date: 2014-09-10
WUHAN UNIV
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Problems solved by technology

The method based on the frequency domain can solve the problem of block effect in the spatial domain algorithm to a large extent, but it cannot directly extract the clear pixels in the multi-focus source image, and needs to reconstruct the fusion image through inverse transformation. The information of the image is less reserved, and the pseudo-Gibbs phenomenon will occur due to the inconsistency of the sources of the corresponding fusion coefficients at multiple scales, which will cause artificial effects such as false contours and textures on the edges of the processed image

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Embodiment

[0064] The present invention comprises the following steps:

[0065] Step 1: Collect a group of multi-focus images, which are a group of multi-focus images focused on the foreground and background respectively in the same scene;

[0066] Step 2: Use the anisotropic thermal diffusion theory to model the imaging process of the multi-focus image, and obtain the depth information of the original multi-focus image collected in step 1. The extraction of the depth information is based on the energy functional pole with a regularization term value, and obtain the depth information of the scene through iteration; including the following sub-steps:

[0067] Step 2.1: Get the calibration parameters of the camera that shoots multi-focus images, and set the threshold ε, virtual time Δt, regularization parameter α, step size β and iteration number Nit; the camera calibration parameters include focal length f, image distance v1 and v2 , lens aperture D, camera parameter γ; ε is the threshol...

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Abstract

The invention belongs to the technical field of image processing, and relates to a multi-focus image fusion method based on depth information extraction. The method is widely applied to the target recognition field, the micro-imaging field, the military operation field, the machine vision field and other fields. The method includes the steps of conducting modeling based on the aeolotropism thermal diffusion theory to obtain the imaging process of a multi-focus image, obtaining depth information of the original multi-focus image, determining the focusing region according to image information, obtaining a multi-focus image fusion template, and conducting fusion of the multi-focus image according to the smooth multi-level fusion template. By means of the method, quality of the fused image can be effectively improved, and the method has high practicability and wide applicability.

Description

technical field [0001] The invention relates to a multi-focus image fusion method, in particular to a multi-focus image fusion method based on depth information extraction. Background technique [0002] During the optical imaging process of the optical lens, due to the limited focus range of the optical imaging system, the imaging of objects outside the focus area will be blurred. Multi-focus image fusion can fuse multiple images with different focus areas, and the synthesis is clear images to improve visual effects. At present, multi-focus image fusion has been widely used in target recognition, microscopic imaging, military operations, machine vision and other fields. The methods of multi-focus image fusion are mainly divided into two categories: methods based on space domain and Transform domain based methods. [0003] The method based on the spatial domain mainly performs fusion processing on the image based on the spatial characteristic information of the image pixels....

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Application Information

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IPC IPC(8): G06T5/50G06T3/40G06T7/00
Inventor 肖进胜钱超邹白昱洪羽萌涂超平杜康华鄢煜尘
Owner WUHAN UNIV
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