Uncalibrated multi-viewpoint image correction method for parallel camera array

A multi-viewpoint image and camera array technology, applied in image communication, image analysis, image data processing, etc., can solve difficult application requirements, high precision requirements for multi-camera calibration parameters, inability to complete multi-camera calibration, etc. , to achieve the effect of being easy to implement and increasing the scope of multi-view correction
CN102065313AInactive Publication Date: 2011-05-18SHANGHAI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI UNIV
Publication Date
2011-05-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to an uncalibrated multi-viewpoint image correction method for parallel camera array. The method comprises the steps of: at first, extracting a set of characteristic points in viewpoint images and determining matching point pairs of every two adjacent images; then introducing RANSAC (Random Sample Consensus) algorithm to enhance the matching precision of SIFT (Scale Invariant Feature Transform) characteristic points, and providing a blocking characteristic extraction method to take the fined positional information of the characteristic points as the input in the subsequent correction processes so as to calculate a correction matrix of uncalibrated stereoscopic image pairs; then projecting a plurality of non-coplanar correction planes onto the same common correction plane and calculating the horizontal distance between the adjacent viewpoints on the common correction plane; and finally, adjusting the positions of the viewpoints horizontally until parallaxes are uniform, namely completing the correction. The composite stereoscopic image after the multi-viewpoint uncalibrated correction of the invention has quite strong sense of width and breadth, prominently enhanced stereoscopic effect compared with the image before the correction, and can be applied to front-end signal processing of a great many of 3DTV application devices.
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Description

technical field

[0001] The invention relates to a method for correcting multi-viewpoint images, in particular to a method for correcting unmarked multi-viewpoint images of a parallel camera array. Background technique

[0002] 3D TV is the next-generation TV technology after digital high-definition TV, and it has attracted more and more attention because of its unique three-dimensional, depth and roaming characteristics. The multi-camera real-time acquisition stereo display system is an important application of 3D TV. It transmits the video captured by multiple cameras in real time to the server, processes the multi-viewpoint images in the server, synthesizes the stereo images and displays them on the stereo display. For the parallel camera array, due to the unavoidable operation error and equipment precision limitation, the method of manually adjusting the camera position cannot fully simulate the placement of the ideal parallel camera array. The multi-viewpoint images...

Claims

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