Three-dimensional smoke density field generating method based on single-viewpoint images

A density field, single-view technology, applied in image data processing, animation production, instruments, etc., can solve the problems of sensitive parameters, large amount of calculation of numerical methods, and inability to express in detail by simulation methods, so as to achieve simple data collection, Effects with fast processing times

Inactive Publication Date: 2012-06-13
BEIHANG UNIV
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Problems solved by technology

Its shortcomings are also very obvious. On the one hand, the numerical method has a large amount of calculation, and each frame needs to solve the partial differentia

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  • Three-dimensional smoke density field generating method based on single-viewpoint images
  • Three-dimensional smoke density field generating method based on single-viewpoint images
  • Three-dimensional smoke density field generating method based on single-viewpoint images

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] The main flow chart of the present invention is as figure 1 As shown, the specific steps are as follows:

[0022] (1) Segment the existing smoke data into local smoke by image segmentation.

[0023] Wherein, the existing smoke data is collected from a single viewpoint direction by a single image collection device. The image acquisition device here can be a digital camera, video camera or high-speed camera.

[0024] The image segmentation method steps include three steps:

[0025] 1.1. Calculate the binary image from the collected smoke image data, and calculate the distance image through distance transformation according to the binary image. The method is to assign values ​​from the boundary to the interior in turn, and the distance value of the pixel to be assigned is its adjacent pixel. Add 1 to the known maximum distance...

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Abstract

The invention relates to a three-dimensional smoke density field generating method based on single-viewpoint images. Three-dimensional smoke density field can be regenerated on a computer by the aid of data of smoke images shot from a single viewpoint to create three-dimensional animation of smoke. The method includes: firstly, using the image segmentation method to segment existing smoke data into local smokes; secondly, computing principal direction and outline basis function of each local smoke according to the local smokes; thirdly, using the proceduring method to generate the three-dimensional density fields of the local smokes according to the principal direction and outline basis function of each local smoke; and fourthly, joining the three-dimensional density fields to generate a continuous three-dimensional smoke density field. The three-dimensional smoke density field generating method based on single-viewpoint images has the advantages that firstly, data acquisition is simple, and only one camera is used for acquiring smoke data from one viewpoint; and secondly, processing is quick, and the three-dimensional smoke density field can be generated in real time.

Description

technical field [0001] The invention belongs to the field of computer animation, in particular to a method for generating a smoke three-dimensional density field based on a single-viewpoint image. Background technique [0002] The modeling and rendering of realistic objects has always been the focus of graphics research, and it is also the core content of applications such as virtual reality. In recent years, camera-based real object modeling and reconstruction methods have become active research hotspots in the fields of computer graphics and computer vision. Image-based modeling has a high sense of realism, especially for complex natural phenomena, such as the geometry of trees and flowers, the reflective properties of human hair and skin, the movement of people and clothing, etc. Due to the complexity of these phenomena or objects, it is often difficult to efficiently and realistically model them through traditional modeling methods such as analytical formulas and mathem...

Claims

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Application Information

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IPC IPC(8): G06T13/60
Inventor 齐越刘征彦
Owner BEIHANG UNIV
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