6,682 research outputs found
Toward Depth Estimation Using Mask-Based Lensless Cameras
Recently, coded masks have been used to demonstrate a thin form-factor
lensless camera, FlatCam, in which a mask is placed immediately on top of a
bare image sensor. In this paper, we present an imaging model and algorithm to
jointly estimate depth and intensity information in the scene from a single or
multiple FlatCams. We use a light field representation to model the mapping of
3D scene onto the sensor in which light rays from different depths yield
different modulation patterns. We present a greedy depth pursuit algorithm to
search the 3D volume and estimate the depth and intensity of each pixel within
the camera field-of-view. We present simulation results to analyze the
performance of our proposed model and algorithm with different FlatCam
settings
Open Quantum Systems in Noninertial Frames
We study the effects of decoherence on the entanglement generated by Unruh
effect in noninertial frames by using bit flip, phase damping and depolarizing
channels. It is shown that decoherence strongly influences the initial state
entanglement. The entanglement sudden death can happens irrespective of the
acceleration of the noninertial frame under the action of phase flip and phase
damping channels. It is investigated that an early sudden death happens for
large acceleration under the depolarizing environment. Moreover, the
entanglement increases for a highly decohered phase flip channel.Comment: 11 pages, 6 eps figure
Total Edge Irregularity Strength for Graphs
An edge irregular total -labelling of a graph is a labelling of the vertices and the edges of
in such a way that any two different edges have distinct weights. The
weight of an edge , denoted by , is defined as the sum of the label
of and the labels of two vertices which incident with , i.e. if ,
then . The minimum for which has an edge
irregular total -labelling is called the total edge irregularity strength of
In this paper, we determine total edge irregularity of connected and
disconnected graphs
Noisy Relativistic Quantum Games in Noninertial Frames
The influence of noise and of Unruh effect on quantum Prisoners' dilemma is
investigated both for entangled and unentangled initial states. The noise is
incorporated through amplitude damping channel. For unentangled initial state,
the decoherence compensates for the adverse effect of acceleration of the frame
and the effect of acceleration becomes irrelevant provided the game is fully
decohered. It is shown that the inertial player always out scores the
noninertial player by choosing defection. For maximally entangled initially
state, we show that for fully decohered case every strategy profile results in
either of the two possible equilibrium outcomes. Two of the four possible
strategy profiles become Pareto Optimal and Nash equilibrium and no dilemma is
leftover. It is shown that other equilibrium points emerge for different region
of values of decoherence parameter that are either Pareto optimal or Pareto
inefficient in the quantum strategic spaces. It is shown that the Eisert et al
miracle move is a special move that leads always to distinguishable results
compare to other moves. We show that the dilemma like situation is resolved in
favor of one player or the other.Comment: 14 pages and 6 figure
- β¦