Real-time accurate optical flow-based motion sensor
Real-time accurate optical flow-based motion sensor
复制标题
基于光流的实时精确运动传感器
DOI：
10.1109/icpr.2008.4761126
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
J. Archibald
中科院分区：
文献类型：
--
作者：
Zhaoyi Wei;Dah;B. Nelson;J. Archibald
介绍了一种用FPGA实现的高精度实时运动传感器。该传感器采用基于岭回归的光流算法，解决了传统最小二乘法存在的共线问题。它还应用了广泛的时间平滑的图像序列的衍生物，以提高其光流估计的准确性。在定制的嵌入式FPGA平台上实现，每秒可处理60幅320 × 240或15幅640 × 480图像。通过评估其准确性的合成序列，它在这里示出，所提出的设计实现了非常高的精度相比，其他已知的基于硬件的设计。
An accurate real-time motion sensor implemented in an FPGA is introduced in this paper. This sensor applies an optical flow algorithm based on ridge regression to solve the collinear problem existing in traditional least squares methods. It additionally applies extensive temporal smoothing of the image sequence derivatives to improve the accuracy of its optical flow estimates. Implemented on a customized embedded FPGA platform, it is capable of processing 60 320 × 240 images or 15 640 × 480 images per second. By evaluating its accuracy on synthetic sequences, it is shown here that the proposed design achieves very high accuracy compared to other known hardware-based designs.