An Integrated Circuit for Two-Dimensional Edge-Detection with Local Adaptation Based on Retinal Networks
An Integrated Circuit for Two-Dimensional Edge-Detection with Local Adaptation Based on Retinal Networks
复制标题
基于视网膜网络的局部自适应二维边缘检测集成电路
DOI：
10.1007/s10043-002-0001-8
复制
发表时间：
2002
期刊：
影响因子：
1.2
通讯作者：
Y. Furukawa
中科院分区：
文献类型：
--
作者：
Hitoshi Yamada;Takashi Miyashita;M. Ohtani;K. Nishio;H. Yonezu;Y. Furukawa
我们设计了一种基于脊椎动物外视网膜的二维图像边缘检测集成电路，该电路在图像处理中具有很大的动态范围。该单元电路简单，工作方式为电流模式模拟金属氧化物半导体(MOS)电路。为了从由亮域和暗域组成的图像中提取边缘，该电路实现了一种称为局部自适应的功能，其中灵敏度与图像的局部亮度相适应。利用集成电路增强仿真程序(SPICE)对光强在四个数量级以上的二维高斯分布图像进行了仿真，结果显示了局部自适应。结果，输出图像的强度在一个数量级的范围内。对实际图像的仿真结果表明，当输入光电流在两个数量级以上时，能够成功地检测出比亮域暗5倍的暗域中的边缘。
We designed an integrated circuit for edge detection of a two-dimensional image based on the vertebrate outer retina, which has wide dynamic range in image processing. The unit circuit is simple, and operates as a current-mode analog metal-oxide-semiconductor (MOS) circuit. In order to extract edges from an image composed of bright and dark domains, the circuit realizes a function called local adaptation in which the sensitivity adapts to local brightness of the image. Simulation results, using the simulation program with integrated circuit emphasis (SPICE), of two-dimensional Gaussian-distributed images in which the intensity ranged over four orders of magnitude, showed the local adaptation. As a result, the intensity of output images was in the range of one order of magnitude. Furthermore, as the simulation result of real images, it was shown that edges in the dark domain, which was five times darker than the bright domain, were successfully detected as the bright domain in which input photocurrents ranged over two orders of magnitude.