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 438 for “"dynamic range"”.
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High Dynamic Range and Omnifocus Imaging
This thesis also develops a new imaging model, which is more accurate than the conventional models (pinhole, thin-lens and Gaussian thick-lens). Our investigation of the standard models shows that the models make two implicit assumptions: first, that the aperture is coincident with the first …
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A high dynamic range capacitive displacement sensor
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1993.
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A wide dynamic range single-sideband receiver.
Massachusetts Institute of Technology. Dept. of Electrical Engineering. Thesis. 1968. M.S.
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The dynamic range of a parametric amplifier
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1962.
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A new approach to dynamic range enhancement
… a new approach for effectively increasing the dynamic range of optical fiber links for transporting RF signals. This new approach, called the Dynamic Range Enhancement Technique (DRET), is key to connecting remotely located microcell base station antenna sites to a centralized base station via …
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A wide-dynamic-range time-based CMOS imager
… sensing algorithm suitable for use in wide-dynamic-range CMOS imagers. A prototype 150 x 256 pixel imager employing this algorithm experimentally achieves 95.5 dB dynamic range, 37 dB peak signal-to-noise ratio (SNR), and a highly-linear transfer characteristic while consuming 1.79 …
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Development of High Speed High Dynamic Range Videography
… government, and enthusiasts have been measuring dynamic scenarios with high speed video. One challenge that faces the high speed video community is the dynamic range of the sensors. The dynamic range of the sensor is constrained to the bit depth of the analog to digital converter, the deep well …
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Adaptive gain spatial receiver for wide dynamic range communication links
… to scattering impedes operation for many wide dynamic range links. In the atmosphere, communication is often limited to short transmission times when optimal power is delivered to the detector, as the distance and channel conditions between ground terminals and airborne or space systems changes …
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An electronic device to reduce the dynamic range of speech
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1982.
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Companding techniques for high dynamic range audio CODEC receiver path
… the signal to noise ratio and improve the dynamic range of the audio CODEC Rx path by up to 18 dB. Further, two compensation techniques are analyzed in attempt to reduce the companding transients. The results show that transients in the output are reduced on average by 60% when using either …
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High dynamic range video merging, tone mapping, and real-time implementation
Although High Dynamic Range (High Dynamic Range (HDR)) imaging has been the subject of significant research over the past fifteen years, the goal of cinemaquality HDR video has not yet been achieved. This work references an optical method patented by Contrast Optical which is used to capture …
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Assessing High Dynamic Range Imagery Performance for Object Detection in Maritime Environments
… This study proposes the introduction of high dynamic range cameras on autonomous surface vessels because these cameras capture images at different levels of exposure revealing more detail than fixed exposure cameras. To see if this introduction will be beneficial for autonomous vessels this …
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A Unified Framework for High-Frame-Rate High-Dynamic-Range Video Synthesis
Creating high-dynamic-range (HDR) video at high-frame rates is a technically demanding and application-critical problem, particularly in domains such as cinematography and autonomous perception. The challenge arises from the limitations of conventional image sensors in capturing both temporal and …
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A Parallel Architecture for Analog-to-Digital Conversion with Improved Dynamic Range
… (ADCs) is developed to increase the system dynamic range. The proposed architecture is a critical component for a Continuous Wave Stepped Frequency (CWSF) radar system. Existing Commercial Off-The-Shelf (COTS) components are inadequate to meet the demands of a high sample rate and a high …
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Real-time Realistic Rendering And High Dynamic Range Image Display And Compression
… is, by its very nature, an image of high dynamic range (HDR). This leads to the issues of the display of such images on conventional low dynamic range devices and the development of data compression algorithms to store and recover the corresponding large amounts of detail found in HDR …
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A High Dynamic Range CMOS Image Sensor with Adaptive Integration Time Control
… local integration time allows imaging of high dynamic range scenes without loss of information due to over- or underexposure. Depending on the size of the integrated memory, the proposed concept allows the specification of a freely movable image region within which the integration time is …
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Improving Photometric Camera Accuracy and Image Quality in High Dynamic Range Imaging
… with the challenge of capturing the vast range of light intensities present in the real world and reproducing them on a medium with much lower dynamic range. This challenge persisted from the era of print photography and continued with the adoption of standard dynamic range (SDR) displays, …
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Dynamic range implications for the effectiveness of semi-active tuned mass dampers
The response of tall buildings subjected to dynamic wind loads has been widely studied. For excitations approaching the resonant frequencies of the structure, ensuring serviceability is a significant concern. One traditional solution is the implementation of a tuned mass damper (TMD), which acts as …
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Phase-locking terahertz quantum cascade lasers for high dynamic range heterodyne imaging
… towards the ultimate goal of achieving a 110 dB dynamic range terahertz QCL imaging system..
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