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A Multilinear Constraint on Dichromatic Planes for Illumination Estimation

机译:用于照明估计的双色平面上的多线性约束

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摘要

A new multilinear constraint on the color of the scene illuminant based on the dichromatic reflection model is proposed. The formulation avoids the problem, common to previous dichromatic methods, of having to first identify pixels corresponding to the same surface material. Once pixels from two or more materials have been identified, their corresponding dichromatic planes can be intersected to yield the illuminant color. However, it is not always easy to determine which pixels from an arbitrary region of an image belong to which dichromatic plane. The image region may cover an area of the scene encompassing several different materials and, hence, pixels from several different dichromatic planes. The new multilinear constraint accounts for this multiplicity of materials and provides a mechanism for choosing the most plausible illuminant from a finite set of candidate illuminants. The performance of this new method is tested on a database of real images
机译:提出了一种基于双色反射模型的场景光源颜色多线性约束新方法。该公式避免了与先前的双色方法相同的问题,即必须首先识别与相同表面材料相对应的像素。一旦识别出来自两种或多种材料的像素,即可将其对应的双色平面相交以产生发光色。然而,确定来自图像的任意区域的哪些像素属于哪个双色面并不总是容易的。图像区域可以覆盖场景的区域,该区域包含几种不同的材质,因此也包含来自几种不同的双色平面的像素。新的多线性约束考虑了这种材料的多样性,并提供了一种从有限组候选光源中选择最合理的光源的机制。此新方法的性能在真实图像数据库上进行了测试

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