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Fluid video synthetic method based on static image

A still image and video synthesis technology, applied in 3D image processing, image data processing, animation production, etc., can solve problems such as large amount of calculation and inability to adapt to changing scenes

Inactive Publication Date: 2008-12-17
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its shortcoming is that although this method changes the process of fluid simulation in detail, it is still essentially a pure graphics fluid simulation based on physics, and the amount of calculation is still large. Once the initial conditions are determined, they cannot be changed, and cannot adapt to many scenarios. changing requirements

Method used

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  • Fluid video synthetic method based on static image
  • Fluid video synthetic method based on static image
  • Fluid video synthetic method based on static image

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Experimental program
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Embodiment

[0034] The first step is to establish basic fluid models such as convection, divergence, rotation, translation and water waves.

[0035] In the process of establishing this model, the difference between the present invention and the traditional NS equation solution process is that a balance needs to be achieved in the speed and accuracy of the solution, so some factors are ignored, and the motion of the fluid is regarded as the density field at the velocity Driven by the field. In this way, the velocity field can be established and calculated first, and then the density field can be calculated. For the construction of the velocity field, it is considered that the fluid is incompressible and non-viscous, and the velocity field here is three-dimensional, expressed according to polar coordinates. Since various basic shapes such as translation, rotation, divergence, and source point flow have different physical properties in the radial and angular velocity directions, they can be...

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Abstract

The invention discloses a fluid video composition method based on stationary images, and belongs to the computer technology field. The method comprises the following steps: building a three-dimensional model of the shifting, the spreading, the rotation and the water wave of a fluid according to the knowledge of hydromechanics; pre-processing images, including matting and separation of the images and complementary drawing of the background; projecting the three dimensional fluid model onto the separated images, and regulating parameters according to the requirement of a video editor in the process; composing video sequences and the complementarily drawn background image to generate new video sequences; and dynamically combining the new video sequences to obtain a continuous fluid dynamic video. The method can be conducted in steps, can ensure the convenient use, strong commonality and small calculation volume of video composition, and can conveniently edit and process stationary images containing fluid.

Description

technical field [0001] The invention relates to a synthesis method in the technical field of image processing, in particular to a fluid video synthesis method based on still images. Background technique [0002] Fluid mainly refers to phenomena such as water flow, waterfalls, and smog in nature. Fluid video animation synthesis is currently a research hotspot in the field of computer vision, and has broad application prospects in the fields of digital entertainment and weather forecasting. People not only need the realism of the image, but also the realism of the movement. The complexity of real motion often makes it difficult for people to express it in some processes. At this time, it can only be reflected with the help of physical laws in the real world. Behind the real is physics, physics describes how objects move, how they act, and how they interact with each other. However, on the one hand, some physical laws in this world are very complex, and the physical descripti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T15/70G06T13/00
Inventor 赵语涛刘允才张鸣
Owner SHANGHAI JIAO TONG UNIV
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