A Highly Integrated Multi-Feature Vision System for Active Safety Applications
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With continued progress in the development and implementation of driver assistance systems and vehicle warning systems, more and more sensors and components are slated to debut on the vehicle to support more and more active safety functions, making the trend to integrate multiple safety functions in a single system increasingly appealing. In this paper, the authors present a highly integrated stereo vision based system that successfully encompasses a variety of active safety functions in one single module. Using a megapixel stereo image sensor, they are able to generate high resolution, high dynamic range, wide field of view intensity images as well as range images for all the supported functions. Efficient computational design and hardware implementation of vision algorithms enables the system to accomplish multiple safety functions, including forward collision warning, lane departure warning, pedestrian protection, collision mitigation by braking, adaptive cruise control, traffic sign recognition, advanced headlamp control and driver alertness warning. This integrated hardware module design paves the way for more coherent and seamless cooperation and coordination of multiple feature functions, making the presented system a powerful and cost effective onboard system for active safety applications.