眼睛的位置在视频图像处理过程中是一个很重要的信息。针对视频中实时人眼定位问题,提出了一种在嵌入式设备上实时运行的人眼定位系统。人眼定位算法采用改进了的平均合成的精确滤波算法(Average of Synthetic Exact Filters,ASEF),在...眼睛的位置在视频图像处理过程中是一个很重要的信息。针对视频中实时人眼定位问题,提出了一种在嵌入式设备上实时运行的人眼定位系统。人眼定位算法采用改进了的平均合成的精确滤波算法(Average of Synthetic Exact Filters,ASEF),在构建稳定的平均滤波器的同时减少了训练图像的数量,使得在保证准确率的同时减少了训练时间。通过在ARM11上移植Open CV视觉库和QT实现了该系统的算法设计和界面设计。在多个标准人脸图像库和通过摄像头采集的视频流上进行的实验表明,该系统能够准确定位人眼,满足实时性的要求。展开更多
O438 97021010一种用于图象压缩的神经网络结构的研究=Re- search on a neural network structure for imagecompression[刊,中]/江芳泽,李昕(上海大学自动化学院.上海(200072))//电子技术应用.-1995,(7).-8-10讨论了用于图象压缩的神...O438 97021010一种用于图象压缩的神经网络结构的研究=Re- search on a neural network structure for imagecompression[刊,中]/江芳泽,李昕(上海大学自动化学院.上海(200072))//电子技术应用.-1995,(7).-8-10讨论了用于图象压缩的神经网络结构,提出了一种与离散余弦变换相结合的基本边缘特征的神经网络结构,以期获得更好的图象压缩效果。图6参7(方舟)展开更多
In inertial navigation system(INS) and global positioning system(GPS) integrated system, GPS antennas are usually not located at the same location as the inertial measurement unit(IMU) of the INS, so the lever arm eff...In inertial navigation system(INS) and global positioning system(GPS) integrated system, GPS antennas are usually not located at the same location as the inertial measurement unit(IMU) of the INS, so the lever arm effect exists, which makes the observation equation highly nonlinear. The INS/GPS integration with constant lever arm effect is studied. The position relation of IMU and GPS's antenna is represented in the earth centered earth fixed frame, while the velocity relation of these two systems is represented in local horizontal frame. Due to the small integration time interval of INS, i.e. 0.1 s in this work, the nonlinearity in the INS error equation is trivial, so the linear INS error model is constructed and addressed by Kalman filter's prediction step. On the other hand, the high nonlinearity in the observation equation due to lever arm effect is addressed by unscented Kalman filter's update step to attain higher accuracy and better applicability. Simulation is designed and the performance of the hybrid filter is validated.展开更多
文摘O438 97021010一种用于图象压缩的神经网络结构的研究=Re- search on a neural network structure for imagecompression[刊,中]/江芳泽,李昕(上海大学自动化学院.上海(200072))//电子技术应用.-1995,(7).-8-10讨论了用于图象压缩的神经网络结构,提出了一种与离散余弦变换相结合的基本边缘特征的神经网络结构,以期获得更好的图象压缩效果。图6参7(方舟)
基金Project(41374018)supported by the National Natural Science Foundation of ChinaProject(J13LN74)supported by the Shandong Province Higher Educational Science and Technology Program,China
文摘In inertial navigation system(INS) and global positioning system(GPS) integrated system, GPS antennas are usually not located at the same location as the inertial measurement unit(IMU) of the INS, so the lever arm effect exists, which makes the observation equation highly nonlinear. The INS/GPS integration with constant lever arm effect is studied. The position relation of IMU and GPS's antenna is represented in the earth centered earth fixed frame, while the velocity relation of these two systems is represented in local horizontal frame. Due to the small integration time interval of INS, i.e. 0.1 s in this work, the nonlinearity in the INS error equation is trivial, so the linear INS error model is constructed and addressed by Kalman filter's prediction step. On the other hand, the high nonlinearity in the observation equation due to lever arm effect is addressed by unscented Kalman filter's update step to attain higher accuracy and better applicability. Simulation is designed and the performance of the hybrid filter is validated.
