A low-power orientation-selective vision sensor
A low-power orientation-selective vision sensor
复制标题
一种低功耗方向选择性视觉传感器
DOI：
10.1109/82.842111
复制
发表时间：
2000
期刊：
影响因子：
--
通讯作者：
Bertram E. Shi
中科院分区：
文献类型：
--
作者：
Bertram E. Shi
我们描述了一种使用弱反转晶体管电路来计算类似于Gabor滤波器的方位选择滤波器输出的焦平面阵列。滤光片的尺度和取向选择性都可以通过电子方式进行调节。我们利用晶体管作为伪电导或扩散器的概念，使用电流而不是电压来表示感兴趣的信号。与以前的强反转设计相比，这种设计能够以相似的电路复杂度实现滤波器响应的能效计算。给出了采用1.2/SPLµ/m工艺制作的12/SPL倍/14像素阵列的测试结果。
We describe the implementation of a focal plane array for computing the outputs of orientation-selective filters similar to Gabor filters using weak inversion transistor circuits. Both the scale and orientation selectivity of the filter can be tuned electronically. We exploit the concept of the transistor as a pseudo-conductance or diffuser and use current, rather than voltage, to represent signals of interest. This design enables energy-efficient computation of the filter responses with similar circuit complexity, as compared with previous strong inversion designs. Test results from a 12/spl times/14 pixel array fabricated in 1.2-/spl mu/m technology are presented.