图像处理采用通用非线性单元

V. Jain, L. Lin
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引用次数: 15

摘要

许多图像处理算法的硅实现在过去由于其复杂性和计算量而受到阻碍。本文讨论了两种这样的算法,即“通过霍夫变换检测线段”和“CT图像重建中的反向投影”。为了获得显著的速度优势,我们提出了一个多功能单元,用于执行四种非线性操作之一:(1)平方根,(2)倒数,(3)正弦/余弦和(4)arctan /spl - /所有这些操作都在单个芯片中实现,可选择,每两个时钟周期输出一个新的结果。介绍了采用2.0微米CMOS工艺制作的24位和16位四功能“双周期”VLSI芯片的设计和测试结果。还讨论了一种新的“单周期”架构,它可能使芯片的吞吐量增加一倍。利用该非线性单元开发了应用级霍夫变换模块。Hough模块可以在每个时钟周期内提供接收平面线的参数。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Image processing using a universal nonlinear cell
Silicon implementation of many image processing algorithms has been hindered in the past due to their complexity and computational volume. This paper discusses two such algorithms, namely the 'Detection of line segments via Hough transform' and 'Backprojection in CT image reconstruction'. To gain a significant speed advantage, we present a multi-function cell for performing one of four nonlinear operations: (1) square-root, (2) reciprocal, (3) sine/cosine, and (4) arctangent/spl minus/all realized in a single chip, available on a selectable basis, and outputting a new result every two clock cycles. The design and test results of a 24 bit and a 16 bit four-function "two cycle" VLSI chip, both fabricated in 2.0 micron CMOS technology, are described. Also discussed is a new "one-cycle" architecture, which can potentially double the throughput of the chip. Using this nonlinear cell an application level Hough transform module is developed. The Hough module can deliver parameters of the line in the image plane every clock cycle.<>
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