Method for segmenting out-of-focus fuzzy regions of images in multi-view three-dimensional reconstruction

A technology for 3D reconstruction and blurred areas, applied in the field of multi-view 3D reconstruction, can solve problems affecting the quality and effect of 3D digital models, and the texture of 3D digital models is not clear

Inactive Publication Date: 2017-05-10
SHANDONG UNIV
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Problems solved by technology

If the out-of-focus blurred area in the photo is used for texture mapping on the 3D digital model, the textu

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  • Method for segmenting out-of-focus fuzzy regions of images in multi-view three-dimensional reconstruction
  • Method for segmenting out-of-focus fuzzy regions of images in multi-view three-dimensional reconstruction
  • Method for segmenting out-of-focus fuzzy regions of images in multi-view three-dimensional reconstruction

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[0029] The present invention will be described in detail below in conjunction with the drawings:

[0030] figure 1 It is the implementation flow chart of the present invention, such as figure 1 As shown, the implementation process of the present invention is as follows:

[0031] (1) This method requires multi-view stereo reconstruction software to calibrate the camera and establish a three-dimensional digital model of the object. The internal and external parameters of the camera are obtained by calibration.

[0032] (2) Use EXIF ​​information viewing software to read the focal length f, the aperture value N, the diameter of the circle of confusion c, and the focus point coordinates saved in the photo;

[0033] (3) Starting from the center o of the camera, send a ray through the focus point pixel in the image, and find the first intersection p with the surface of the object. The distance from this intersection p to the camera center o is the camera's focusing distance s. Calculate th...

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Abstract

The invention discloses a method for segmenting out-of-focus fuzzy regions of images in multi-view three-dimensional reconstruction. The method comprises the following steps of: demarcating a camera and establishing a three-dimensional digital model; reading a focal distance, an aperture value, a blur circle diameter and a focus point coordinate stored in a photo; calculating a focusing distance of the camera; calculating a front depth of field and a rear depth of field; and for each pixel, searching a corresponding point on the surface of an object, and if the depth value of the corresponding point is out of the range of the depth of field of the camera, considering that the pixel is located in an out-of-focus fuzzy region. By utilizing the segmented images to carry out texture mapping on three-dimensional models, clear textures can be obtained.

Description

technical field [0001] The invention relates to the field of multi-view three-dimensional reconstruction, in particular to a method for segmenting image out-of-focus blur regions in multi-view three-dimensional reconstruction. Background technique [0002] Three-dimensional digital models of objects are widely used in animation, games, film and television, archaeology, architecture and other fields. The 3D reconstruction method based on multi-view stereo technology uses photos taken with digital cameras from different angles, and the computer uses software to calibrate the camera, generate point clouds, mesh models, and texture mapping to calculate the 3D digital model of the object surface. At present, multi-view 3D reconstruction technology has gradually matured, and a variety of free and commercial software have emerged. Due to their low price, simple operation, and wide application range, they have been widely used in many fields. [0003] Affected by the depth of field...

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Application Information

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IPC IPC(8): G06T7/11G06T7/80G06T15/04G06T5/00
CPCG06T5/003G06T15/04G06T2207/10004
Inventor 潘荣江
Owner SHANDONG UNIV
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