RGBD image ambient light editing method and system based on spherical harmonic illumination

An RGB image, ambient light technology, applied in the direction of editing/combining graphics or text, etc., can solve the problems of difficult application of image lighting adjustment and complex ambient light.

Active Publication Date: 2019-12-13
WUHAN UNIV
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Problems solved by technology

[0004] The embodiment of the present application provides a method and system for editing RGBD image ambient light based on spherical harmonic illumination, which solves the problem in the prior art that the illumination adjustment of images is difficult to apply to complex ambient light conditions

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  • RGBD image ambient light editing method and system based on spherical harmonic illumination
  • RGBD image ambient light editing method and system based on spherical harmonic illumination
  • RGBD image ambient light editing method and system based on spherical harmonic illumination

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Embodiment Construction

[0079] In order to better understand the above-mentioned technical solution, the above-mentioned technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0080] The invention provides a method for editing RGBD image ambient light based on spherical harmonic illumination, which mainly includes the following steps:

[0081] Step 1, preprocessing the input RGBD image to obtain a shadowless reflectance map, a shadowless light and shade map, and a shadow map;

[0082] Step 2, decomposing the shadow-free light and shade map into an illumination detail map and a spherical harmonic illumination map;

[0083] Step 3. Obtain the adjusted spherical harmonic illumination map through interactive editing;

[0084] Step 4, adjusting the shadow map according to the spherical harmonic illumination map and the adjusted spherical harmonic illumination map to obtain an adjusted shadow map;

[0085] Step 5: Synthesi...

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Abstract

The invention belongs to the technical field of digital image processing, and discloses an RGBD image ambient light editing method and system based on spherical harmonic illumination, and the method comprises the steps: carrying out the preprocessing of an inputted RGBD image to obtain a shadow-free reflectivity image, a shadow-free brightness image and a shadow image; decomposing the shadow-freebrightness image into an illumination detail image and a spherical harmonic illumination image; obtaining an adjusted spherical harmonic illumination graph through interactive editing; adjusting the shadow map according to the spherical harmonic illumination map and the adjusted spherical harmonic illumination map to obtain an adjusted shadow map; and according to the shadowless reflectance map, the adjusted spherical harmonic illumination map and the adjusted shadow map, synthesizing to obtain an RGB image edited by the ambient light and outputting the RGB image. The system comprises a preprocessing unit, a bright and dark image decomposition unit, an interactive editing unit, a shadow image adjusting unit and an image synthesis unit. The method is suitable for various conditions with complex ambient light, and can automatically estimate the ambient light in the image.

Description

technical field [0001] The present invention relates to the technical field of digital image processing, in particular to an RGBD image ambient light editing method and system based on spherical harmonic illumination. Background technique [0002] The distribution of light is an important factor affecting the quality of photos, especially ambient light. In the field of professional photography, photographers often improve the light distribution of the environment by adding artificial light sources. However, the actual situation is more complicated. The adjustment of artificial light sources is not only difficult to achieve ideal lighting conditions, but also consumes a lot of equipment and manpower. Furthermore, images that have already been captured can only be edited through post-processing methods. Users need a convenient image processing method, so that the lighting in it can be edited and enhanced freely and conveniently. [0003] Although some current re-lighting me...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T11/60
CPCG06T11/60
Inventor 肖春霞段炼
Owner WUHAN UNIV
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