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Book Cover
Author Sarkar, Mukul.

Title A biologically inspired CMOS image sensor / Mukul Sarkar and Albert Theuwissen
Published Berlin ; New York : Springer, [2013]
Online access available from:
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Description 1 online resource
Series Studies in computational intelligence, 1860-949X ; 461
Studies in computational intelligence ; 461
Contents Introduction -- Natural and Artificial Compound Eye -- Design of a CMOS Image Sensor -- Design of a CMOS Polarization Sensor -- Material Classification Using CMOS Polarization Sensor -- Navigation Using CMOS Polarization Sensor -- Motion Detection and Digital Polarization -- Future Works
Summary Biological systems are a source of inspiration in the development of small autonomous sensor nodes. The two major types of optical vision systems found in nature are the single aperture human eye and the compound eye of insects. The latter are among the most compact and smallest vision sensors. The eye is a compound of individual lenses with their own photoreceptor arrays. The visual system of insects allows them to fly with a limited intelligence and brain processing power. A CMOS image sensor replicating the perception of vision in insects is discussed and designed in this book for industrial (machine vision) and medical applications. The CMOS metal layer is used to create an embedded micro-polarizer able to sense polarization information. This polarization information is shown to be useful in applications like real time material classification and autonomous agent navigation. Further the sensor is equipped with in pixel analog and digital memories which allow variation of the dynamic range and in-pixel binarization in real time. The binary output of the pixel tries to replicate the flickering effect of the insect's eye to detect smallest possible motion based on the change in state. An inbuilt counter counts the changes in states for each row to estimate the direction of the motion. The chip consists of an array of 128x128 pixels, it occupies an area of 5 x 4 mm2 and it has been designed and fabricated in an 180nm CMOS CIS process from UMC
Analysis Engineering
Computer vision
Computational Intelligence
Image Processing and Computer Vision
Signal, Image and Speech Processing
Bibliography Includes bibliographical references
Subject Image converters -- Design and construction.
Metal oxide semiconductors, Complementary.
Image processing -- Digital techniques.
Form Electronic book
Author Theuwissen, Albert J. P.
LC no. 2012952472
ISBN 3642349013 (electronic bk.)
9783642349010 (electronic bk.)