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Method for rebuilding shape of hemisphere three-dimensional surface with control point information

A three-dimensional surface and hemisphere technology, applied in 3D modeling, image data processing, instruments, etc., can solve the problem of low accuracy of the three-dimensional surface shape of reconstructed objects, and achieve the effects of high speed, reduced average relative error, and high accuracy

Inactive Publication Date: 2010-06-02
SHANGHAI UNIV
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Problems solved by technology

However, although this method has a fast measurement speed, the accuracy of the three-dimensional surface shape of the reconstructed object obtained by this algorithm is not high

Method used

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  • Method for rebuilding shape of hemisphere three-dimensional surface with control point information
  • Method for rebuilding shape of hemisphere three-dimensional surface with control point information
  • Method for rebuilding shape of hemisphere three-dimensional surface with control point information

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Embodiment Construction

[0021] The embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods are provided, but the protection scope of the present invention is not limited to the following embodiments. .

[0022] A preferred embodiment of the method for reconstructing the three-dimensional surface shape of a hemisphere using control point information of the present invention is described in detail in conjunction with the accompanying drawings as follows: figure 1 As shown, the specific steps are as follows:

[0023] (1) Construct a standard hemispherical model and set up the image surface irradiance equation

[0024] The prerequisite for obtaining the three-dimensional surface shape of an object is the solution of the hemispherical irradiance equation. The way to get the surface irradiance equation i...

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Abstract

The invention discloses a method for rebuilding the shape of a hemisphere three-dimensional surface with control point information, which comprises the following steps of: building a standard hemisphere model, obtaining three hemisphere gray level images from three angles, and building a substance surface irradiance equation; uniquely ensuring a substance surface directional gradient with the substance surface irradiance equation and a luminosity three-dimensional method, processing by means of a variational method, and rebuilding a hemisphere three-dimensional surface f1 (x, y) from the directional gradient; and obtaining an interposition surface f2 (x, y) with an interposition algorithm and a hemisphere surface control point three-dimensional information, linearly superposing the f1 (x, y) and the f2 (x, y) to obtain three-dimensional information of each point of the surface of the substance to further obtain a rebuilt substance three-dimensional surface f3 (x, y). The method not only can fast measure the shape of the hemisphere three-dimensional surface, but also has high precision for measuring the obtained shape of the rebuilt hemisphere three-dimensional surface. An experimental result shows that the average relative error of the rebuilt hemisphere three-dimensional surface is reduced by about 1.3%.

Description

technical field [0001] The invention belongs to the technical field of three-dimensional surface measurement of objects, and in particular relates to a method for reconstructing the three-dimensional surface shape of a hemisphere by using control point information, which provides a theoretical basis and application space for the accurate reconstruction of a three-dimensional model of a real object. Background technique [0002] In order to meet the needs of industrial inspection, reverse engineering and multimedia 3D modeling, obtaining accurate information of the 3D surface of objects has become one of the hot research issues in recent years. However, how to make the reconstructed three-dimensional surface of the object infinitely close to the surface of the standard object has not yet been well solved. [0003] At present, the three-dimensional surface reconstruction methods of objects are distinguished according to whether they are contacted or not, and are mainly divided...

Claims

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Application Information

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IPC IPC(8): G06T17/10
Inventor 张栋吕东辉
Owner SHANGHAI UNIV
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