A model-based approach to camera's auto exposure control

作者：Su Yuanhang^*; Lin Joe Yuchieh; Kuo C C Jay

来源：Journal of Visual Communication and Image Representation, 2016, 36: 122-129.

DOI：10.1016/j.jvcir.2016.01.011

• Auto exposure control
• Convex function
• Digital cameras
• Numerical analysis
• Control systems
• Robust systems
• Fast convergence
• Secant method
• CMOS digital cameras
• HDR

A fast and robust camera's auto exposure (AE) technique is proposed in this work. It is achieved by modeling the luminance characteristics of the imaging sensor as a concave or convex function of a control parameter (e.g., exposure time or speed) and the optimal control parameter is computed using a modified secant algorithm with fast convergence. Furthermore, the proposed solution is able to adjust the control parameter automatically in the presence of erroneous exposure. Its superior performance is confirmed by experimental results.

• 出版日期2016-4