A CMOS image sensor for high-speed active range finding using column-parallel time-domain ADC and position encoder
A CMOS image sensor for high-speed active range finding using column-parallel time-domain ADC and position encoder
复制标题
使用列并行时域 ADC 和位置编码器进行高速主动测距的 CMOS 图像传感器
DOI：
10.1109/ted.2002.806967
复制
发表时间：
2003
影响因子：
3.1
通讯作者：
K. Asada
中科院分区：
文献类型：
--
作者：
Y. Oike;M. Ikeda;K. Asada
本文提出了一种用于片状光投影的实时高分辨率三维 (3-D) 测量的智能图像传感器。它不仅实现了用于实时 3D 测量的足够高的帧速率，而且由于像素电路小而实现了高像素分辨率，并且由于使用强度分布进行重心计算而实现了高子像素精度。仿真结果表明，在 1024/spl 次/1024 像素传感器中，最终帧速率为 32.6 k 帧/s（即 31.8 range/spl I.bar/map/s）。 3-b 强度分布允许低于 0.1 像素的子像素精度。使用这种架构的传感器也可以获取二维 (2-D) 图像，因此可以通过同一传感器再现纹理映射的 3-D 图像。 128/spl次/128智能图像传感器已开发并成功测试。 3D 测量系统使用所制造的传感器获取了 2D 图像、范围图和纹理映射 3D 图像。
In this paper, a smart image sensor for real-time and high-resolution three-dimensional (3-D) measurement to be used for sheet light projection is presented. It realizes not only a sufficiently high frame rate for real-time 3-D measurement, but also high pixel resolution due to a small pixel circuit and high subpixel accuracy due to gravity center calculation using an intensity profile. Simulation results show that the ultimate frame rate is 32.6 k frames/s (i.e., 31.8 range/spl I.bar/map/s) in a 1024/spl times/1024 pixel sensor. A 3-b intensity profile allows subpixel accuracy under 0.1 pixel. The sensor using this architecture can acquire a two-dimensional (2-D) image as well, so a texture-mapped 3-D image can be reproduced by the same sensor. A 128/spl times/128 smart image sensor has been developed and successfully tested. A 2-D image, a range map, and a texture-mapped 3-D image have been acquired by the 3-D measurement system using the fabricated sensor.