Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 32 for “"image sensors"”.
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Low noise cmos image sensors
… serving as the primary care option. Fluorescence image-guided surgery has been explored to aid surgeons identify specific tissue in the patient during operations but these systems tend to interfere with workflow. CMOS image sensors have been explored as a solution because of their high …
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Synthetic movies derived from multi-dimensional image sensors
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Architecture, 1989.
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Radiation Damage in CMOS Image Sensors for Space Applications
… Complementary Metal Oxide Semiconductor (CMOS) image sensors, affecting their performance over time or causing total failure. The first part of this work investigates a Charge Coupled Device (CCD) style CMOS image sensor designed for TDI (Time Delay and Integration) mode imaging, a mode commonly …
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Predictive multiple sampling algorithm with overlapping integration intervals for linear wide dynamic range integrating image sensors
… ratios in excess of 10⁶ : 1. Solid-state image sensors that can correctly process wide illumination dynamic range scenes are therefore required to ensure correct reliability and performance. This thesis describes a new algorithm to linearly increase the illumination dynamic range of …
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Firmware Design and Testing for Data Handling and Control of Time Delay Integration Image Sensors in an Earth Observation Payload
… Earth observation data. These high-resolution images tend to generate a lot of data which needs to be processed in a very short time. This high data rate problem is the focus of this work. This work tries to tackle this problem in two ways. Firstly, a Time Delay Integration (TDI) image Sensor …
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Utilization and Configuration of a Multi-Spectral Image Sensor for Turfgrass Data Collection
… analysis as the basis for management decisions. Sensors are a potentially viable data collection tool to meet these needs. One type of sensor, spectral reflectance sensors, measures reflected light from turfgrass leaves. The primary hypothesis of this research is that image sensors can be used as …
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An Optical Resection Local Positioning System for an Autonomous Agriculture Vehicle
… of the precision and low cost of digital image sensors. Whereas the components in other positioning systems tend to be more specialized, the widespread consumer demand for inexpensive and high quality cameras has allowed for billions of dollars of research and development to be spread …
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A charge coupled device based optical tomographic instrumentation system for particle sizing.
… coupled device (abbreviated as CCD) linear image sensors in an optical tomographic instrumentation system used for sizing particles. Four CCD linear image sensors are configured around an octagonal shaped flow pipe for a four projections system. The measurement system is explained and uses …
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CMOS Active Pixel Sensors for Digital Cameras: Current State-of-the-Art
Image sensors play a vital role in many image sensing and capture applications. Among the various types of image sensors, complementary metal oxide semiconductor (CMOS) based active pixel sensors (APS), which are characterized by reduced pixel size, give fast readouts and reduced noise. APS are …
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Design of the Electronics Subsystem for a High-Resolution Electro-Optical Payload Using Systems Engineering Approach
Satellite imagers, in contrast to commercial imagers, demand exceptional performance and operate under harsh conditions. The camera is an essential part of an Earth Observation Electro Optical (EO) payload that is designed in response to needs such as military demands, changes in world politics, …
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Building an electronic drafting table for sketch recognition
… drafting table in this thesis uses linear image sensors located in the corners and triangulation to locate the exact position of the pen. The design of the sensors in the corner and the required electronics are explored in detail. We developed, built and tested electronics, proving the …
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Multiple-input multiple-output visible light communication receivers for high data-rate mobile applications
… and sparsity of high-resolution transmitter images in imaging VLC receivers to greatly increase the rate at which complementary metal-oxide semiconductor (CMOS) active pixel sensor (APS) image sensors can sample VLC signals though improved signal routing to enable such high-resolution image …
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Image compression and energy harvesting for energy constrained sensors
… or replacing batteries is too costly. Therefore, image compression and energy harvesting are studied in this dissertation. The integration of energy harvesting, image compression, and an image sensor on the same chip provides the energy source to charge a battery, reduces the data rate, and …
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Biologically inspired composite image sensor for deep field target tracking
<p>The use of nonuniform image sensors in mobile based computer vision applications can be an effective solution when computational burden is problematic. Nonuniform image sensors are still in their infancy and as such have not been fully investigated for their unique qualities nor have they been …
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Community computation
… framework of community sensing with a group of image sensors. The goal is to present a set of novel tools in which software, rather than humans, examines the collection of images sensed by a group of image sensors to determine what is happening in the field of view. We also present several …
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Qualification of a CMOS linear image sensor LIS-1024
… of well-known applications are the optical imagers and sensors used for cameras, scanners, and barcode readers. The two prominent image sensor types are Complimentary Metal Oxide Semiconductor (CMOS) image sensors and Charge Coupled Devices (CCDs). While CMOS sensors have traditionally …
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Entwurf und Modellierung von Multikanal-CMOS-Farbsensoren
Color image acquisition and image processing have become a key in modern data application. In order to provide high quality images, the field of accurate acquisition is most important in respect to all further processing steps. But a whole variety of current image sensors possess incorrect color …
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A Unified Framework for High-Frame-Rate High-Dynamic-Range Video Synthesis
… arises from the limitations of conventional image sensors in capturing both temporal and radiometric fidelity. This work introduces a unified framework that jointly addresses HDR reconstruction and temporal interpolation from sequences captured with alternating exposures. In contrast to prior …
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Development, Evaluation, and Analysis of Complex Eye Movement Biometrics
… capture of eye movements from even low-quality image sensors, reducing the cost of entry and enabling integration with many existing iris, periocular, and facial recognition systems. The following thesis describes the development of biometric techniques for the automated identification of human …
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Design and analysis of highspeed electronics for electro optical payload of small satellites
… detectors to fulfil the swath need and also the image sensors have to operate at a very high-speed with the sensor electronics requiring faster clock rates and larger bandwidth. The sensor data handler has to transfer a large amount of data to the spacecraft in real time incorporating the …
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