An improved estimation of motion vectors of feature points is proposed for tracking moving objects of dynamic image sequence. Feature points are firstly extracted by the improved minimum intensity change （MIC） algor...An improved estimation of motion vectors of feature points is proposed for tracking moving objects of dynamic image sequence. Feature points are firstly extracted by the improved minimum intensity change （MIC） algorithm. The matching points of these feature points are then determined by adaptive rood pattern searching. Based on the random sample consensus （RANSAC） method, the background motion is finally compensated by the parameters of an affine transform of the background motion. With reasonable morphological filtering, the moving objects are completely extracted from the background, and then tracked accurately. Experimental results show that the improved method is successful on the motion background compensation and offers great promise in tracking moving objects of the dynamic image sequence.展开更多
为了设计一种支持电子式像移补偿功能的高帧频大面阵CCD驱动电路,满足像移补偿功能。论文首先给出了大面阵CCDFTF5066M的基本驱动电路,然后在其基础上通过增加一个"像移补偿时序发生器"与主时序发生器SAA8103配合工作来实现...为了设计一种支持电子式像移补偿功能的高帧频大面阵CCD驱动电路,满足像移补偿功能。论文首先给出了大面阵CCDFTF5066M的基本驱动电路,然后在其基础上通过增加一个"像移补偿时序发生器"与主时序发生器SAA8103配合工作来实现电子像移补偿,给出了"像移补偿发生器"内部设计结构,所增加的像移补偿时序发生器只用于产生曝光期间所需的几个垂直转移驱动时序和转发SAA8103产生的时序信号。选择了FPGA作为像移补偿时序发生器,并且进行了时序仿真。最后对设计的驱动电路进行了室内像移补偿实验验证,取得了很好的补偿效果,该驱动电路系统支持最大帧频可达2.7 F/s,信噪比达到了66 d B。该驱动电路能方便地选择输出通道数量和输出方式,使相机适用于不同的场合。展开更多
为了提高像移测量精度,针对机载航空摆扫相机提出一种坐标变换法和图像相关法相结合的像移测量方法。利用坐标变换法得到初始像移速度,利用图像联合变换相关法对像移速度残差进行补偿。联合图像通过一个面阵CCD获得,该面阵CCD放置在相...为了提高像移测量精度,针对机载航空摆扫相机提出一种坐标变换法和图像相关法相结合的像移测量方法。利用坐标变换法得到初始像移速度,利用图像联合变换相关法对像移速度残差进行补偿。联合图像通过一个面阵CCD获得,该面阵CCD放置在相机焦平面上并与成像线阵TDI CCD平行,其输出的当前图像与参考图像合并构成联合图像进行二维空间联合变换相关运算,得到像移修正矢量。对该矢量分别在相机摆扫方向和载机飞行方向进行分解,从而得到摆扫像移和前向像移的修正量。仿真实验结果表明,在输入图像信噪比为4 d B时,像移测量误差在0.1 pixel以内。展开更多
文摘An improved estimation of motion vectors of feature points is proposed for tracking moving objects of dynamic image sequence. Feature points are firstly extracted by the improved minimum intensity change （MIC） algorithm. The matching points of these feature points are then determined by adaptive rood pattern searching. Based on the random sample consensus （RANSAC） method, the background motion is finally compensated by the parameters of an affine transform of the background motion. With reasonable morphological filtering, the moving objects are completely extracted from the background, and then tracked accurately. Experimental results show that the improved method is successful on the motion background compensation and offers great promise in tracking moving objects of the dynamic image sequence.
文摘为了设计一种支持电子式像移补偿功能的高帧频大面阵CCD驱动电路,满足像移补偿功能。论文首先给出了大面阵CCDFTF5066M的基本驱动电路,然后在其基础上通过增加一个"像移补偿时序发生器"与主时序发生器SAA8103配合工作来实现电子像移补偿,给出了"像移补偿发生器"内部设计结构,所增加的像移补偿时序发生器只用于产生曝光期间所需的几个垂直转移驱动时序和转发SAA8103产生的时序信号。选择了FPGA作为像移补偿时序发生器,并且进行了时序仿真。最后对设计的驱动电路进行了室内像移补偿实验验证,取得了很好的补偿效果,该驱动电路系统支持最大帧频可达2.7 F/s,信噪比达到了66 d B。该驱动电路能方便地选择输出通道数量和输出方式,使相机适用于不同的场合。
文摘为了提高像移测量精度,针对机载航空摆扫相机提出一种坐标变换法和图像相关法相结合的像移测量方法。利用坐标变换法得到初始像移速度,利用图像联合变换相关法对像移速度残差进行补偿。联合图像通过一个面阵CCD获得,该面阵CCD放置在相机焦平面上并与成像线阵TDI CCD平行,其输出的当前图像与参考图像合并构成联合图像进行二维空间联合变换相关运算,得到像移修正矢量。对该矢量分别在相机摆扫方向和载机飞行方向进行分解,从而得到摆扫像移和前向像移的修正量。仿真实验结果表明,在输入图像信噪比为4 d B时,像移测量误差在0.1 pixel以内。
