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- Mirror:
Multimedia
query
processing in
extensible
databases: (1998)The mi R
Ror project
investigates
the
implications
of multimedia
information
retrieval on
database
design. We
assume a
modern
extensible
database
system with
extensions for
feature based
search
techniques.
The multimedia
query
processor has
to bridge the
gap between
the user's
high level
information
need and the
search
techniques
available in
the database.
We therefore
propose an
iterative
query process
using
relevance
feedback. The
query
processor
identifies
which of the
available...
Source: (1998) - Natural
feature
tracking for
augmented
reality: Multimedia,
IEEE
Transactions
on, Vol. 1,
No. 1. (1999),
pp.
53-64.Natural
scene features
stabilize and
extend the
tracking range
of augmented
reality (AR)
pose-tracking
systems. We
develop robust
computer
vision methods
to detect and
track natural
features in
video images.
Point and
region
features are
automatically
and adaptively
selected for
properties
that lead to
robust
tracking. A
multistage
tracking
algorithm
produces
accurate
motion
estimates, and
the entire
system
operates in a
closed-loop
that
stabilizes its
performance
and accuracy.
We present
demonstrations
of the
benefits of
using tracked
natural
features for
AR
applications
that
illustrate
direct scene
annotation,
pose
stabilization,
and extendible
tracking
range. Our
system
represents a
step toward
integrating
vision with
graphics to
produce robust
wide-area
augmented
realities
Source: Multimedia, IEEE Transactions on, Vol. 1, No. 1. (1999), pp. 53-64. - Live
three-dimensio
nal content
for augmented
reality: Multimedia,
IEEE
Transactions
on, Vol. 7,
No. 3. (2005),
pp. 514-523.We
describe an
augmented
reality system
for
superimposing
three-dimensio
nal (3-D) live
content onto
two-dimensiona
l fiducial
markers in the
scene. In each
frame, the
Euclidean
transformation
between the
marker and the
camera is
estimated. The
equivalent
virtual view
of the live
model is then
generated and
rendered into
the scene at
interactive
speeds. The
3-D structure
of the model
is calculated
using a fast
shape-from-sil
houette
algorithm
based on the
outputs of 15
cameras
surrounding
the subject.
The novel view
is generated
by projecting
rays through
each pixel of
the desired
image and
intersecting
them with the
3-D structure.
Pixel color is
estimated by
taking a
weighted sum
of the colors
of the
projections of
this 3-D point
in nearby real
camera images.
Using this
system, we
capture live
human models
and present
them via the
augmented
reality
interface at a
remote
location. We
can generate
384/spl
times/288
pixel images
of the models
at 25 fps,
with a latency
of
Source: Multimedia, IEEE Transactions on, Vol. 7, No. 3. (2005), pp. 514-523. - Quality of
perception:
user quality
of service in
multimedia
presentations: Multimedia,
IEEE
Transactions
on, Vol. 7,
No. 4. (2005),
pp. 786-789.We
define quality
of perception
(QoP) as
representing
the user side
of the more
technical and
traditional
quality of
service. QoP
encompasses
not only a
user's
satisfaction
with the
quality of
multimedia
presentations,
but also
his/her
ability to
analyze,
synthesise and
assimilate the
informational
content of
multimedia
displays. We
found that
significant
reductions in
frame rate and
color depth
does not
result in a
significant
QoP
degradation.
Source: Multimedia, IEEE Transactions on, Vol. 7, No. 4. (2005), pp. 786-789. - ?Reinventing
the Wheel?: A
Novel Approach
to Music
Player
Interfaces: Multimedia,
IEEE
Transactions
on, Vol. 9,
No. 3. (2007),
pp. 567-575.We
present a
novel
interface to
(portable)
music players
that benefit
from
intelligently
structured
collections of
audio files.
For
structuring,
we calculate
similarities
between every
pair of songs
and model a
travelling
salesman
problem (TSP)
that is solved
to obtain a
playlist
(i.e., the
track ordering
during
playback)
where the
average
distance
between
consecutive
pieces of
music is
minimal
according to
the similarity
measure. The
similarities
are determined
using both
audio signal
analysis of
the music
tracks and
Web-based
artist profile
comparison.
Indeed, we
show how to
enhance the
quality of the
well-establish
ed methods
based on audio
signal
processing
with features
derived from
Web pages of
music artists.
Using TSP
allows for
creating
circular
playlists that
can be easily
browsed with a
wheel as input
device. We
investigate
the usefulness
of four
different TSP
algorithms for
this purpose.
For evaluating
the quality of
the generated
playlists, we
apply a number
of quality
measures to
two real-world
music
collections.
It turns out
that the
proposed
combination of
audio and
text-based
similarity
yields better
results than
the initial
approach based
on audio data
only. We
implemented an
audio player
as Java applet
to demonstrate
the benefits
of our
approach.
Furthermore,
we present the
results of a
small user
study
conducted to
evaluate the
quality of the
generated
playlists
Source: Multimedia, IEEE Transactions on, Vol. 9, No. 3. (2007), pp. 567-575.
If you would like to find additional social bookmark based links on the topic of Multimedia we recommend the Open Tag Directory > Multimedia. If you would like to find related tags we recommend Tag Patterns > Multimedia.
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