A Novel Range Finding System Using Correlation Image Sensor
A Novel Range Finding System Using Correlation Image Sensor
复制标题
使用相关图像传感器的新型测距系统
DOI：
10.1541/ieejsmas.121.367
复制
发表时间：
2001
影响因子：
--
通讯作者：
S. Ando
中科院分区：
文献类型：
--
作者：
A. Kimachi;T. Kurihara;M. Takamoto;S. Ando
本文提出了一种相关图像传感器（CIS）的三维测量原理，它在每个像素处产生光强与外部参考信号之间的时间相关性。除了CIS之外，我们的系统的另一个关键是扫描片状光束的振幅调制，其相对于参考信号的相位根据扫描角度而变化。在帧内扫描之后，相位用正交参考信号对解调，并由CIS输出，以计算每个像素处的片光束的单独角度。由于锁定检测原理，背景照明和/或物体的表面反射率不均匀性的影响被彻底消除。我们使用我们的CMOS 64×64像素CIS实现了该系统，并成功地重建了其帧速率（30 Hz）下的深度图。
This paper proposes a 3-D measurement principle for the correlation image sensor (CIS), which generates temporal correlation between light intensity and an external reference signal at each pixel. Another key of our system besides the CIS is amplitude-modulation of the scanning sheet beam, the phase of which relative to a reference signal is varied according to the scanning angle. After a scan within a frame, the phase is demodulated with a quadrature pair of reference signals and output by the CIS to compute the individual angle of the sheet beam at each pixel. By virtue of lock-in detection principle, the effects of background illumination and/or surface reflectance nonuniformity of the object are thoroughly removed. We implemented this system using our CMOS 64×64-pixel CIS, and successfully reconstructed a depth map under its frame rate (30Hz).