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Image synthesis method and apparatus based on mixed gradient field and mixed boundary condition

A technology of boundary conditions and image synthesis, applied in image enhancement, image data processing, instruments, etc., can solve problems such as image synthesis errors

Active Publication Date: 2009-10-07
TSINGHUA UNIV
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Problems solved by technology

[0003] The problem to be solved by the embodiments of the present invention is to provide an image synthesis method and device based on mixed gradient fields and mixed boundary conditions, so as to overcome the defects in the prior art that can not only maintain consistent image illumination and color, but also reduce image synthesis errors

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  • Image synthesis method and apparatus based on mixed gradient field and mixed boundary condition
  • Image synthesis method and apparatus based on mixed gradient field and mixed boundary condition
  • Image synthesis method and apparatus based on mixed gradient field and mixed boundary condition

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Embodiment Construction

[0025] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] An image synthesis method based on mixed gradient fields and mixed boundary conditions in an embodiment of the present invention is as follows: figure 1 shown, including the following steps:

[0027] In step s101, a source image and a target image are acquired, and a position where an object in the source image is synthesized into the target image. That is, the user inputs the source image for synthesis (an image containing an object to be synthesized, such as a photo of a bear) and the target image (a background image to be synthesized, such as a photo of a snow-capped mountain scene, the user's purpose is to synthesize the bear into the snow-capped mountain scene...

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Abstract

The present invention discloses an image synthesis method and apparatus based on mixed gradient field and mixed boundary condition, the method includes: acquiring a source image and a target image and a position of target image synthesized by object in the source image; acquiring outline of the object to be synthesized in the source image; getting a fusion area by expanding the outline; dividing the fusion area into two kinds according to differences of the source image and the target image in texture and color; choosing different gradient field and different boundary condition for the two kinds of areas, and obtaining a intermediate result by solving the poisson equation of the mixed boundary condition; proceeding transparency fusion to the intermediate result and the target image of one kind area, the other areas using the results solved by the poisson equation to synthetize final image. The invention can use accurate boundary of the synthesized object to reduce synthesis error, and can use gradient field transmission and solving of the poisson equation to keep consistency of the synthesized image in illumination and color, using simple interaction of users to generate synthesized image with third dimension.

Description

technical field [0001] The invention relates to the technical field of image synthesis, in particular to an image synthesis method and device based on mixed gradient fields and mixed boundary conditions. Background technique [0002] With the development of multimedia technology and network technology, rich image resources on the Internet have been widely used, and various image processing technologies have become a hot field of computer science research. Among them, the image synthesis technology allows users to combine multiple photos into a fake photo, and meets the user's requirements for photo content. Some commercial software related to image processing, such as Adobe Photoshop and Pixel image editor, can achieve this purpose through complex user interaction. But these require users to have strong art expertise and proficiency in software. Even so, users need to pay long hours of boring labor. In recent years, because this technology can be widely used in many fields...

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Application Information

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IPC IPC(8): G06T5/50
Inventor 胡事民陈韬程明明张松海
Owner TSINGHUA UNIV
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