Rendering method and device based on high dynamic range image

Abstract

The embodiment of the present invention discloses a rendering method based on high dynamic range images, which is used to solve the problem of lack of changes in brightness and shape of images processed by existing rendering technologies. The method of the embodiment of the present invention includes: constructing a hollow sphere with a diameter larger than the size of the computer composite body; covering the entire inner surface of the hollow sphere with an HDR background image; completing the first rendering; constructing in the HDR background image for placement The plane of the computer composite body is used as a supporting surface; the second rendering is completed; the RGB values ​​of the two rendered images are subtracted, the texture area is cut out from the subtraction result image, and the texture area is repeatedly covered to the support surface; place the computer composite body on the support surface, use the rendering incident light to complete final rendering, and output the resulting final image. Embodiments of the present invention also provide a rendering device based on high dynamic range images.

Description

technical field [0001] The present invention relates to the fields of image processing, scene virtualization, computer vision, etc., and in particular to a rendering method and device based on high dynamic range images. Background technique [0002] In computer graphics, image-based rendering technology has gradually become a hot research field in recent years. This technology uses images to record scene lighting information, constructs virtual models to simulate global illumination, renders computer composites, and better integrates computer composites into background images. The more advanced image-based lighting technology uses high dynamic range (HDR) images as photometry maps, and HDR images can truly record the scene light intensity to illuminate the scene. Image-based rendering technology requires the ability to provide consistent lighting conditions in order to achieve better rendering effects. The research and improvement in this field has positive significance for...

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a rendering method and device based on high dynamic range images, which can solve the problem of lack of brightness and shape changes in images processed by existing rendering technologies

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