An Automatic White Balance Method Based on Edge Detection

Automatic white balance is an important function of digital still and video cameras. The goal of white balance is to adjust the color of the pixels under different illumination automatically. In this paper, we proposed a new method of automatic white balance. In our algorithm, we detected the image edges on the value of C_b and C_r firstly, and then took the pixels near edges in the both side as references pixels to calculate the correction coefficients for R, G and B respectively. The experimental results show that our algorithm performs well even though the images are dominated by few chromatic regions and short of highlight near-white highlight pixels