VLSI implementation of a focal plane image processor - A realization of the near-sensor image processing concept
VLSI implementation of a focal plane image processor - A realization of the near-sensor image processing concept
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DOI：
10.1109/92.532033
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发表时间：
1996-09-01
影响因子：
2.8
通讯作者：
Astrom, A
中科院分区：
文献类型：
--
作者：
Eklund, JE;Svensson, C;Astrom, A
先前已在理论上描述过的近传感器图像处理概念在此通过实施进行了验证。NSIP 描述了一种实现每个像素均具有处理能力的二维 (2-D) 图像传感器阵列的方法。传统上，高空间分辨率和复杂的处理器元件之间存在矛盾，在 NSIP 概念中，我们有一个无损光电二极管读出，因此我们可以在不丢失灰度信息的情况下处理二进制图像，全局图像处理由异步全局逻辑单元处理，这两个功能使得可以在小型处理器元件中进行高效的图像处理，解决了功耗和固定模式噪声等电气问题，所有设计都针对 0.8 英寸的 128 x 128 像素 NSIP毫米双金属单多晶 CMOS 工艺，我们制造并测量了 32 x 32 像素 NSIP，我们还给出了图像处理任务的示例，例如梯度和最大检测、直方图均衡和滞后阈值处理。在 NSIP 概念中，160 dB 范围内的自动光自适应是可能的。
The near-sensor image processing concept, which has earlier been theoretically described, is here verified with are implementation, The NSIP describes a method to implement a two-dimensional (2-D) image sensor array with processing capacity in every pixel. Traditionally, there is a contradiction between high spatial resolution and complex processor elements, In the NSIP concept we have a nondestructive photodiode readout and we can thereby process binary images without loosing gray-scale information, The global image processing is handled by an asynchronous Global Logical Unit, These two features makes it possible to have efficient image processing in a small processor element, Electrical problems such as power consumption and fixed pattern noise are solved, All design is aimed at a 128 x 128 pixels NSIP in a 0.8 mm double-metal single-poly CMOS process, We have fabricated and measured a 32 x 32 pixels NSIP, We also give examples of image processing tasks such as gradient and maximum detection, histogram equalization, and thresholding with hysteresis. In the NSIP concept automatic light adaptivity within a 160 dB range is possible.