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Now showing items 11-20 of 38
Sparkle vision : seeing the world through random specular microfacets
(Massachusetts Institute of Technology, 2014)
This thesis studies the problem of reproducing the world lighting from a single image of an object covered with random specular microfacets on the surface. Such a reflector can be interpreted as a randomized mapping from ...
Phase-locking terahertz quantum cascade lasers for high dynamic range heterodyne imaging
(Massachusetts Institute of Technology, 2020)
Terahertz radiation exhibits unique properties that make it an attractive candidate for safe imaging. Current barriers to its commercial implementation include the shortage of efficient terahertz detectors and convenient, ...
Reducing pause times with clustered collection
(Massachusetts Institute of Technology, 2014)
Clustered Collection reduces garbage collection pauses in programs with large amounts of live data. A full collection of millions of live objects can pause the program for multiple seconds. Much of this work, however, is ...
Low complexity pseudorandom generators and indistinguishability obfuscation
(Massachusetts Institute of Technology, 2018)
In the study of cryptography in NCO, it was previously known that Goldreich's candidate pseudorandom generator (PRG) is insecure when instantiated with a predicate P in 4 or fewer variables, if one wants to achieve polynomial ...
Energy-efficient approximate computation in Topaz
(Massachusetts Institute of Technology, 2015)
The increasing prominence of energy consumption as a first-order concern in contemporary computing systems has motivated the design of energy-efficient approximate computing platforms. These computing platforms feature ...
A programmable pipeline for multi-material fabrication
(Massachusetts Institute of Technology, 2014)
3D printing hardware is rapidly scaling up to output continuous mixtures of multiple materials at increasing resolution over ever larger print volumes. This poses an enormous computational challenge: large high-resolution ...
Modeling temporally-regulated effects on distributions
(Massachusetts Institute of Technology, 2015)
We present a nonparametric framework for modeling an evolving sequence of (estimated) probability distributions which distinguishes the effects of sequential progression on the observed distribution from extraneous sources ...
Approximate k-means clustering through random projections
(Massachusetts Institute of Technology, 2015)
Using random row projections, we show how to approximate a data matrix A with a much smaller sketch à that can be used to solve a general class of constrained k-rank approximation problems to within (1 + [epsilon]) error. ...
Analyzing pulse from head motions in video
(Massachusetts Institute of Technology, 2014)
We extract heart rate and beat lengths from videos by measuring subtle head oscillations that accompany the cardiac cycle. Our method tracks features on the head, temporally filters their trajectories and performs principal ...
Finite blocklength analysis of the MISO Coherent Block Fading Channel
(Massachusetts Institute of Technology, 2014)
The Coherent MISO Block Fading Channel is a wireless communication channel model in which the transmitter has access to multiple antennas while the receiver has access to one. This model is becoming increasingly important ...