Active Visual Inference of Surface Shape - Roberto Cipolla Part 6 potx
Active Visual Inference of Surface Shape - Roberto Cipolla Part 6 potx
... geometry of the surface in the vicinity of ext~vmal boundary. The surface
is recovered as a family of s-parameter curves - the contour generators - and
t-parameter curves - portions of the
osculating ... recovering surface shape 73
Figure 3.14: Recovery of surface strip in vicinity of extremM boundary.
From a minimum of three views of a curved surfa...
Active Visual Inference of Surface Shape - Roberto Cipolla Part 14 potx
...
[ 163 ]
[ ]64 ]
[ 165 ]
[ 166 ]
[ 167 ]
[ 168 ]
R.S. Millman and G.D. Parker. Elements of Differential Geometry.
Prentice-Hall, N J, 1977.
H.P. Moravec. Visual mapping by a robot rover. In Proc. of ... Human-Computer Interaction. Proceedings,
1995. VIII, 203 pages. 1995.
VOL. 10 16: R. Cipolla, Active Visual Inference of Surface
Shape. XII, 194 pages. 1995.
Vol....
Active Visual Inference of Surface Shape - Roberto Cipolla Part 1 ppt
... shading 166
A.5.2 Interpreting line drawings 167
A.5.3 Shape from contour 168
A.5.4 Shape from texture 169
Curved surfaces 169
A .6. 1 Aspect graph and singularity theory 169
A .6. 2 Shape from ... 10 16)
ISBN 3-5 4 0 -6 064 2-4
NE: GT
CR Subject Classification (1991): 1.4, 1.2.9, 1.3.5, 1.5.4
Cover Illustration: Newton after William Blake
by Sir Eduardo Paolozzi (1992)...
Active Visual Inference of Surface Shape - Roberto Cipolla Part 2 pot
... 3D shape of surfaces in the vicinity of their apparent
contours. We describe the real-time implementations of these algorithms for use
in tasks involving the active exploration of visible surface ...
relate these first to the descriptions of local 3D shape developed from the differ-
ential geometry of surfaces and then to the analysis of visual motion of apparent...
Active Visual Inference of Surface Shape - Roberto Cipolla Part 3 docx
... the
shape of the rim, a convexity of the contour corresponds to a convex
patch of surface, a concavity to a saddle-shaped patch. Inflections of
the contour correspond to flexional curves of ... rs) -p.L(rs)
= -p.n8 (2.20)
2.5. The dynamic analysis of apparent contours 29
Equation (2.31) is derived in section 2 .6. 4. An alternative proof of the rela-
tionship between th...
Active Visual Inference of Surface Shape - Roberto Cipolla Part 7 docx
... for a:
N.n p
(1 - (p.m)~)
a p
a -~ -( 1- (p.m)2).
(4.37)
Differentiating (4.20) and rearranging we can recover the other component, /3:
at p -2 n ~ ( 1-( p.m)2)'/2] - -( p.m) 2)
p U.p] ... Sampling- Isolated texture only "samples" the surface at isolated points
- the surface could have any shape in between the points. Conversely,
a surfa...
Active Visual Inference of Surface Shape - Roberto Cipolla Part 9 doc
... image
velocities can now be expressed in terms of the new parameterisation (see figure
4.12).
qt- O-~s
(4 .66 )
- -~ 8 ~-~ _ t+~ . (4 .67 )
Equation (4 .67 ) is simply resolving the (real) image velocity ... .~P(4.70)
qtt. ap
= O-ts ~'~t'~v-t-2 ~ -~ -~ t .1.
-~
Apart from (~
[~) which we have seen determines the magnitude of the tan-
gential component of...
Active Visual Inference of Surface Shape - Roberto Cipolla Part 10 pptx
... way.
9 The axis of expansion (#) of the deformation component and the
projection in the image of the direction of translation (/A) allow the
recovery of the tilt of the surface (5.28).
9 ... Differential invariants of the image velocity field 127
The magnitude of the depth gradient determines the tangent of the
slant
of the
surface (angle between the surface...
Active Visual Inference of Surface Shape - Roberto Cipolla Part 11 pptx
... interpretation of random-dot stereograms have shown that
even with sparse data the human visual system arrives at unique interpretations
of surface shape - the perception of dense and coherent surfaces ... whereas the interpretation of the
surface consistency theory is that the surface has at most one surface inflection
in the absence of zero-crossings [32]. The im...
Active Visual Inference of Surface Shape - Roberto Cipolla Part 12 pdf
... velocities from the output of a set of spatio-temporal filters. A bank
of 24 spatio-temporal Gabor filters runs continuously in each neighbour-
hood of a time-varying image. Each of the filters is tuned ... contour of objects made of gen-
eralised cylinders can be used to determine the sign of curvature of the
surface.
The disadvantages of these methods is that they ar...
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