.Implementation of automatic white-balance based on adaptive-luminance[J].Optoelectronics Letters,2009,5(2):150-153 Implementation of automatic white-balance based on adaptive-luminance 钟健  姚素英  徐江涛 ASIC Design Center, School of Electronic Information Engineering, Tianjin Univesity, Tianjin 300072, China ? Abstract:       A novel automatic white-balance algorithm based on adaptive-luminance is proposed in this paper. This algorithm rede-fines the gray pixels region, which can filter the gray pixels accurately. Furthermore, with the relations between gray pixels' luminance with standard light source and their chroma Cb, Cr shifts with other color temperatures, the algorithm estab-lishes the equations between the captured pixels and the original ones, which can estimate the gains of RGB channels exactly. To evaluate the proposed algorithm, the objective comparison method and the subjective observation method are both used, and the test results prove that the effects of image emendated by the proposed algorithm are excelled to that by traditional algorithms. Finally, the algorithm is implemented with VLSI design, and the result of synthesis proves that it can satisfy real-time application. Hits: 3556 Download times: 196 View Full Text    Download reader