Abstract: In processing of the digital camera image, automatic white balance is used for partial color revised under different color temperature. In many cases, ordinary algorithms for auto white balance can not return true color images exactly. Aiming at this problem, this paper introduces an automatic white balance algorithm based on Voronoi figure. It uses Voronoi figure to statistics white point number, estimates immediate environment color temperature value, does gain calculation, and corrects images according to the standard images. Experimental results show that this algorithm can improve the image quality in different environment.

Key words: white point number, Voronoi figure, white balance, color temperature, gain

摘要： 在数码相机系统中，不同色温下的图像存在偏色现象，而传统白平衡算法不能准确重现图像的真实颜色。为此，提出一种基于 Voronoi图的自动白平衡算法。利用Voronoi图统计白点数，估计当前环境的色温值，并做增益计算，根据标准值对图像颜色值进行校正。在不同背景和光源下的测试结果表明，该算法可使图像质量得到有效改善。

关键词: 白点数, Voronoi图, 白平衡, 色温, 增益

CLC Number: 

• TP399