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用隔行扫描摄像机采集到的运动物体单帧变形条纹测量三维位移和速度.该方法将一帧变形条纹分成两个单场,利用傅里叶变换轮廓术重建三维面形,从单场条纹的调制度中提取二值化模板,计算质心获得亚像素匹配定位点,通过双三次插值和标定,实现了一个场周期时间内三个维度上的位移和平均速度的测量.匀速运动物体实验结果表明:被测速度的最大绝对误差为0.6 mm/s,相对误差为0.57%.该方法仅用一帧变形条纹即可测量运动物体的三维位移和速度,提高了时间分辨率和测量准确度. 相似文献
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本文阐述了连续扫描和隔行扫描CCD(charge-coupleddevice)摄像机的工作方式和特征,较详细地介绍了连续扫描CCD的工作原理,用图示给出了两种扫描方式的比较。连续扫描方式可从每一个独立像素中获得在一个信号曝光周期之间产生的信号。对于在高分辨率成像情况下,在必需捕捉迅速运动目标的应用领域中,连续扫描CCD是最佳的选择。 相似文献
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Face-centered orthorhombic (FCO) sampling can be implemented more easily on CMOS image sensors than on other video acquisition devices. The sampling efficiency of FCO is the highest among all threedimensional (3D) sampling schemes. However, interpolation of FCO-sampled data is inevitable in bridging human perception and machine-vision algorithms. In this letter, the concept of motion compensation is borrowed from deinterlacing, which displays interlaced videos on progressively scanned devices. The combination of motion estimation based on intrafield interpolated frames and motion-compensated interfieldinterpolation is found to provide the best performance by evaluating different combinations of motion estimation and interpolation. 相似文献
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