Kelly P. Muldoon
Honeywell
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Publication
Featured researches published by Kelly P. Muldoon.
international conference on computational photography | 2011
Scott McCloskey; Kelly P. Muldoon; Sharath Venkatesha
We demonstrate that image stabilizing hardware included in many camera lenses can be used to implement motion invariance and custom blur effects. Motion invariance is intended to capture images where objects within a range of velocities appear defocused with the same point spread function, obviating the need for blur estimation in advance of de-blurring. We show that the necessary parabolic motion can be implemented with stabilizing lens motion, but that the range of velocities to which capture is invariant decreases with increasing exposure time. We also show that, when that range is expanded through increased lens displacement, lens motion becomes less repeatable. In addition to motion invariance, we demonstrate that stabilizing lens motion can be used to design custom defocus kernels for aesthetic purposes, and can replace lens accessories.
Review of Scientific Instruments | 2014
Nicholas D. Guise; Spencer D. Fallek; Harley Hayden; C-S Pai; Curtis Volin; Kenton R. Brown; J. True Merrill; Alexa W. Harter; Jason M. Amini; Lisa M. Lust; Kelly P. Muldoon; Doug Carlson; Jerry Budach
The advent of microfabricated ion traps for the quantum information community has allowed research groups to build traps that incorporate an unprecedented number of trapping zones. However, as device complexity has grown, the number of digital-to-analog converter (DAC) channels needed to control these devices has grown as well, with some of the largest trap assemblies now requiring nearly one hundred DAC channels. Providing electrical connections for these channels into a vacuum chamber can be bulky and difficult to scale beyond the current numbers of trap electrodes. This paper reports on the development and testing of an in-vacuum DAC system that uses only 9 vacuum feedthrough connections to control a 78-electrode microfabricated ion trap. The system is characterized by trapping single and multiple (40)Ca(+) ions. The measured axial mode stability, ion heating rates, and transport fidelities for a trapped ion are comparable to systems with external (air-side) commercial DACs.
international conference on computational photography | 2014
Scott McCloskey; Kelly P. Muldoon; Sharath Venkatesha
We address motion de-blurring using a computational camera that captures an image while the stabilizing optical element moves in a modified Canon IS lens. Our work builds on that of Levin et al. [11], who introduce parabolic motion as a means of achieving invariance to unknown subject velocity in an a priori known direction. While the previous work addresses a specific scenario - exact knowledge of motion orientation and a uniform, symmetric prior on its magnitude - we generalize this to address scenarios where the motion of objects in the scene or the camera itself are known to various extents. We describe a motion invariant camera based on an off-the-shelf lens, and show how its motion and position sensors can be used to inform both the image capture and de-blurring. We demonstrate that our changes to motion invariance improve the quality of captured images in the case of both object and camera motion.
workshop on applications of computer vision | 2015
Scott McCloskey; Sharath Venkatesha; Kelly P. Muldoon; Ryan Eckman
We address the problem of motion blur removal using a computational camera with a fluttering shutter. While there are several prototype flutter shutter cameras, and many scenarios in which motion blur is problematic, there are few real-world uses of flutter shutter cameras due to two important limitations. The first is that the shutter mechanisms used to date - primarily Liquid Crystal Display (LCD) elements or electronic shutters - increase noise due to reduced light efficiency or multiple readouts, respectively. Secondly, the class of motions to which the flutter shutter is applicable has been limited to linear, constant velocity motion. We address the first limitation by developing a prototype flutter shutter camera with a reflective element providing high light efficiency and a single-read imaging system. In addition to improved noise performance, this method of exposure modulation imposes fewer limitations on the shutter sequence, allowing us to extend the flutter shutter technique to cases with constant (non-zero) acceleration. We demonstrate both the noise reduction and improved reconstructions in the case of an accelerating camera.
Archive | 2008
Michael R. Franceschini; David W. Meyers; Kelly P. Muldoon
Archive | 2007
David W. Meyers; Lawrence C. Vallot; Brian W. Schipper; Kelly P. Muldoon
Archive | 2008
Michael R. Franceschini; Yunjung Yi; Kelly P. Muldoon
Archive | 2008
Yunjung Yi; Vicraj T. Thomas; Kelly P. Muldoon; Michael R. Franceschini
Archive | 2006
Robert C. Becker; David W. Meyers; Kelly P. Muldoon; Douglas R. Carlson; Jerome P. Drexler
Archive | 2007
Jerome P. Drexler; Robert C. Becker; David W. Meyers; Kelly P. Muldoon