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

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...

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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 differential equation, and it is very sensitive to parameters; on the other hand, for the complex details of the moving smoke, the simulation method cannot be detailed. show up

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