A light field image registration method and system

Abstract

The invention discloses a light field image registration method and system. The method comprises: a left target light field image and a right target light field image are obtained; a plurality of rectangular detection regions of the left target light field image and a plurality of detection regions of the right target light field image are determined respectively; first feature points are extracted from the detection regions of the left target light field image to form a first feature point set; second feature points are extracted from the detection regions of the right target light field image to form a second feature point set; on the basis of a violent algorithm, the feature points in the first feature point set and the feature points in the second feature point set are matched to obtain a plurality of matched point pairs; coordinates of the feature points in all matched point pairs; on the basis of the coordinates, a homography matrix is calculated; and according to the homographymatrix, an image after registration of the light target field image and the right target light field image is obtained. Therefore, the precision of registration of two light field images with small overlapped regions is improved; and the time consumption is reduced.

Description

technical field [0001] The present invention relates to the technical field of light field data processing, in particular to a light field image registration method and system. Background technique [0002] Light field images are usually obtained by light field cameras, which are different from traditional cameras in that a microlens array is placed between the main lens and the image sensor, so that the sensor can record the intensity information and direction information of light at the same time, realizing the four-dimensional For the collection of light field data, the four-dimensional light field data is the four-dimensional coordinates of a light, and the four-dimensional coordinates are composed of the coordinates on the microlens and the coordinates on the sensor. A very prominent feature of the light field camera is that it can take pictures first and then focus, and can effectively record scenes with a large depth of field without selecting focus, so the shooting s...

AI Technical Summary

Problems solved by technology

Since the existing methods need to extract the light field sub-aperture image from the original light field image, the feature points are obtained by detecting the light field sub-aperture image, and the resolution of the light field sub-aperture image is low, so the overlapping area of ​​the two images must be large enough , to detect sufficient feature points, therefore, for images with small overlapping areas, the registration accuracy is low

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