Splicing method for light field images with inconsistent focal lengths

Abstract

The invention discloses a splicing method of light field images with inconsistent focal lengths. The method comprises the following steps: inputting light field data to be spliced to obtain a light field focus stack, carrying out focal length consistency matching on each depth layer in the light field focus stack to obtain a focal length consistency matching label corresponding to each depth layer, and synthesizing a focal length consistency image according to the focal length consistency matching labels; performing feature point extraction, matching and screening on the light field sub-aperture image and the image with the consistent focal length to obtain feature points and matched feature point pairs; predicting a global homography transformation matrix according to the matched featurepoint pairs, establishing a weight matrix of local mapping, and predicting an optimal homography transformation matrix; and mapping a central sub-aperture image according to the optimal homography transformation matrix, calculating a transformation matrix between the edge sub-aperture image and the central sub-aperture image, and mapping a 4D light field to obtain a light field splicing result. The light field splicing method solves the problem of splicing between light fields when the focal lengths are inconsistent, and realizes an accurate light field splicing method.

Description

technical field [0001] The invention relates to the fields of computer vision and digital image processing, in particular to a splicing method of light field images with non-uniform focal lengths. Background technique [0002] In recent years, light field imaging technology has developed vigorously. As a key technology in the field of computer vision and digital image processing, a microlens array is added between the main lens and the sensor to simultaneously record the intensity information and angle of light through a single shot. information, has aroused great interest in academia and industry. Especially with the increase of the resolution of the optical sensor and the maturity and marketization of the light field camera technology, the practical value of the light field imaging technology becomes higher and higher. Compared with traditional digital cameras, the advantage of light field cameras based on microlens arrays is that while recording the spatial position info...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above technical problems, the present invention proposes a splicing method of light field images with non-uniform focal lengths, which solves the splicing problem between light fields when focal lengths are inconsistent, and realizes an accurate light field splicing method

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