NDLI: Development and Implementation of Automatic White Balance Based on Luminance Compensation

Content Provider	IEEE Xplore Digital Library
Author	Zhong Jian Yao Suying Xu Jiangtao
Copyright Year	2008
Description	Author affiliation: Sch. of Electron. Inf. Eng., Tianjin Univ., Tianjin (Zhong Jian; Yao Suying; Xu Jiangtao) Automatic white balance plays a key role in image signal processing circuit of image sensors, and determines image quality to a large extent. An automatic white balance algorithm based on luminance compensation is proposed. The algorithm establish the equations of RGB channels between the captured image and the natural one firstly based on the assumption that the luminance average of the whole image holds the line when the light source has changed. Then, to compensate the loss of luminance that might be made by the primary plus and make the corrected image equal to the natural one, the algorithm further combines the max white method to amend the gains. So the image will be proofread accurately. To evaluate the proposed algorithm, the subjective observation method and the objective comparison method are both used, and the results of the test prove that the corrected results of image emendated by it are excelled to that by some traditional algorithms. Finally, this algorithm is implemented with VLSI design, and the test of integration indicates that the algorithm is easy to be realized in the integrated circuit and can satisfy the requirement of real-time processing.
Starting Page	206
Ending Page	210
File Size	687001
Page Count	5
File Format	PDF
ISBN	9780769534978
DOI	10.1109/IITA.2008.575
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-12-20
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Algorithm design and analysis VLSI Very large scale integration Automatic white balance Circuit testing Information technology Equations Light sources Image sensors Temperature sensors Integrated circuit testing Color temperature emendation Signal processing algorithms Luminance compensation
Content Type	Text
Resource Type	Article

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