Using square error function and the barycenter algorithm of light intensity as the merit function of focusing and alignment respectively , the system analyzed the images captured by charge coupled device ( ccd ) in the projection screen to produce feedback signals 该系统运用数字图像处理技术,以方差函数和光强重心算法分别作为清晰度调节和三色和色调节的评价函数,分析电荷藕合器件( ccd )采集的局部图像,产生反馈信号。
After comparison of different configurations of accelerometers we design a new configuration with twelve accelerometers . we use square items to calculate angular velocity and do some emulation for different calculation with specific accelerometer accuracy 在比较了不同加速度计配置方案的基础上设计了一种新颖的12加速度计配置方式,采用求平方项的方法解算角速度,在一定的加速度计精度下对不同的解算方法进行了仿真分析。