3D object reconstruction method and device

A technology for three-dimensional reconstruction and objects, which is applied in the field of three-dimensional imaging and can solve the problems that the accuracy of three-dimensional reconstruction objects needs to be further improved, the effect improvement is limited, and the relationship is not fully excavated.

Inactive Publication Date: 2017-03-29
FUJITSU LTD
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Problems solved by technology

However, when calculating the global TSDF (truncated directional distance function, Truncated Signed Distance Function) representation, the traditional 3D reconstruction method simply performs the arithmetic mean of all local TSDF representations, and does not fully explore the relationship between the local TSDF representation and the global TSDF representation. relationship between
Since the effect of 3D reconstruction is only improved by improving the estimation of camera parameters, the effect of traditional 3D reconstruction methods is limited, and the accuracy of 3D reconstruction objects needs to be further improved

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[0017] Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the interest of clarity and conciseness, not all features of an actual implementation are described in this specification. It should be understood, however, that in developing any such practical implementation, many implementation-specific decisions must be made in order to achieve the developer's specific goals, such as meeting those system- and business-related constraints and those Restrictions may vary from implementation to implementation. Moreover, it should also be understood that development work, while potentially complex and time-consuming, would at least be a routine undertaking for those skilled in the art having the benefit of this disclosure.

[0018] Here, it should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only the device structure and / or processing steps closely related ...

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Abstract

The invention discloses a 3D object reconstruction method and device. The method comprises that an initial local TSDF (Truncated Signed Distance Function) value of a voxel in a 3D space is obtained; an optimization problem is solved to obtain a global TSDF value of the voxel; and 3D reconstruction of an object is realized on the basis of the obtained global TSDF value. In the optimization problem, the global TSDF value of the voxel is obtained on the basis of a final local TSDF value of the voxel, the final local TSDF value of the voxel equals an initial local TSDF value of a corresponding voxel which is obtained by carrying out non-rigid transformation on the original voxel, variables refer to parameters of the global TSDF value and non-rigid transformation of the voxel, and a cost function is related to factors including a quadratic sum of differences between the global TSDF values of specific voxels and initial local TSDF values of voxels obtained by carrying out non-rigid transformation on the specific voxels as well as a sum of offset amounts, caused by the non-rigid transformation, of the specific voxels.

Description

technical field [0001] The present invention relates generally to the field of three-dimensional imaging. In particular, the present invention relates to a method and device capable of accurately performing three-dimensional reconstruction of an object. Background technique [0002] In recent years, with the development of 3D imaging technology, many related applications have emerged, such as augmented reality, digital museum, 3D printing and so on. An important aspect of 3D imaging technology is 3D reconstruction technology. Mainstream 3D reconstruction methods reconstruct 3D objects based on a set of depth images. [0003] Traditional 3D reconstruction methods mainly focus on how to estimate camera parameters more accurately, such as introducing deformation information to estimate camera distortion. However, when calculating the global TSDF (truncated directional distance function, Truncated Signed Distance Function) representation, the traditional 3D reconstruction met...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/00
Inventor 李斐刘汝杰
Owner FUJITSU LTD
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