System implications of implementing white balance on consumer digital cameras

Nitin Sampat; Shyam Venkataraman; Robert L. Kremens

doi:10.1117/12.385453

15 May 2000 System implications of implementing white balance on consumer digital cameras

Nitin Sampat, Shyam Venkataraman, Robert L. Kremens

Proceedings Volume 3965, Sensors and Camera Systems for Scientific, Industrial, and Digital Photography Applications; (2000) https://doi.org/10.1117/12.385453
Event: Electronic Imaging, 2000, San Jose, CA, United States

Abstract

In consumer digital cameras, some of the primary tasks in the image capture data path include automatic focus, automatic exposure determination and auto-white balance (AWB). There are numerous algorithms used in implementing these tasks--auto-focus is implemented using maximum contrast, ranging or sonar; white balance using color gamut determinations and `gray value estimations', and auto- exposure using scene evaluations. We evaluate the system implications of implementing one of these tasks, namely white balance on an embedded system--a digital camera. There include, among other things, design approach, power consumption, software vs. hardware implementation and microprocessor vs. ASIC implementation. Commercially available digital cameras and their choice of AWB implementation are discussed where appropriate. Such an evaluation will assist, we hope, anyone designing or building a digital camera sub-system.

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Nitin Sampat, Shyam Venkataraman, and Robert L. Kremens "System implications of implementing white balance on consumer digital cameras", Proc. SPIE 3965, Sensors and Camera Systems for Scientific, Industrial, and Digital Photography Applications, (15 May 2000); https://doi.org/10.1117/12.385453

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