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Region-segmentation-based portrait illumination transfer method

A technology of light migration and region segmentation, applied in image analysis, image data processing, instruments, etc., can solve problems such as poor realism, loss of reflectivity characteristics and structural characteristics, and achieve the effect of enhancing local highlights and real light migration effects.

Active Publication Date: 2013-01-16
BEIHANG UNIV
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AI Technical Summary

Problems solved by technology

For three areas with different material properties such as portrait objects, using the same light migration algorithm, the light migration effect will often lose the reflection of the reflectance characteristics and structural characteristics of different areas, there are many flaws, and the sense of reality is poor.

Method used

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  • Region-segmentation-based portrait illumination transfer method
  • Region-segmentation-based portrait illumination transfer method
  • Region-segmentation-based portrait illumination transfer method

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Embodiment Construction

[0055] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

[0056] refer to figure 1 Is the general frame diagram of the present invention. The present invention includes a lighting effect material library, and for the hair area and face area of ​​the input portrait, portrait materials similar to the material of the target area and similar to the lighting of the reference area can be matched in the library. Modeling of folds in the upper region. In the present invention, the target portrait is first segmented into three areas: hair area, face area, and shoulder area. For the hair area and face area, match the area in the lighting material library with similar materials to the target portrait and the lighting effect of the reference portrait. For the shoulder area, use the wrinkle primitives in the lighting material library to model ...

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Abstract

The invention discloses a region-segmentation-based portrait illumination transfer method. An illumination effect on a reference portrait is transferred to a target portrait, so that the target portrait has an illumination effect similar to that of the reference portrait. An illumination effect material database is established, and most of illumination effects in the nature can be approximately fitted. An illumination material which is the most similar to the illumination attribute of the reference portrait and the material attribute of the target portrait is searched from the illumination effect material database for illumination transfer. An edge preserving filter-based transfer method is used for hair and face regions, and a quotient image method is used for shoulder regions. The consistency of the illumination effect is ensured by using global illumination constraints. The method can be widely popularized and applied to application scenarios such as portrait art illumination effect synthesis, interactive digital entertainment and image virtual scene synthesis.

Description

technical field [0001] The invention relates to the fields of virtual reality, computational photography and computer image processing, in particular to a portrait illumination transfer method based on region segmentation. Background technique [0002] Virtual Reality (Virtual Reality, Lingjing Technology) takes computer technology as the core and combines relevant science and technology to generate a virtual environment that is highly similar to a certain range of real environments in terms of sight, hearing, and touch. It is interactive, immersive, and imaginative. Characteristics. Users interact with objects in the virtual environment with the help of necessary digital media equipment to generate immersive feelings and experiences. The virtual-real fusion scene generation technology based on image material is an important part of virtual reality, and it is also a research hotspot in the organic intersection of virtual reality, augmented reality, computer vision and relat...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T7/60
Inventor 陈小武赵沁平吴洪宇池昌鉴金鑫
Owner BEIHANG UNIV
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