Active Visual Inference of Surface Shape - Roberto Cipolla Part 7 docx
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] ...
differentiating (4. 17) and substituting (4. 27) and (4. 17) :
xB.U 3rip [(P'T)(U'tP)] (4.40)
ntP= ( 1-( p.T)2)3/2 - A( 1-( p.T)2)I/2'
In the sp...
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 the...
Active Visual Inference of Surface Shape - Roberto Cipolla Part 1 ppt
... applied for
Die Deutsche Bibliothek - CIP-Einheitsaufnahme
Cipolla, Roberto:
Active visual inference of surface shape / Roberto Cipolla. -
Berlin ; Heidelberg ; New York ; Barcelona ; Budapest ... recovering surface shape . . . 71
3.5.1 Discriminating between fixed and extremal boundaries . . 7]
3.5.2 Reconstruction of surfaces 75
3.6 Real-time experimen...
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 6 potx
... 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 surface it is possible to recover the
3D geometry of the ... 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...
Active Visual Inference of Surface Shape - Roberto Cipolla Part 9 doc
...
v~, vy - 7 7- 1 0 + T 0 1 +
2 sin it cos It 0 - 1 - sin It cos It
curl&apos ;7 [ 0 -1 ] div -7 [ 1 0] def ~7[ cos2it sin2#]
-
2 1 0 +T 0 1 + 7- sin2it -cos2#
where curl'S, div~ and def ~7 represent ... have:
U1
U0
~-~ 2
A
U2
v0
- + f~1
A
curl~ = -2 ~3 + (-VlAy + U2A~) (5.16)
A2
U3 U1A~ + U~Ay
diw7 = 2-~ - + A2 (5. 17)
(UtA~ -...
Active Visual Inference of Surface Shape - Roberto Cipolla Part 10 pptx
... Differential invariants of the image velocity field 1 27
The magnitude of the depth gradient determines the tangent of the
slant
of the
surface (angle between the surface normal and the visual direction). ... 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 th...
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 ... solutions to the problem of
recovering reliable descriptions of curved surface shape. These have been de-
veloped from the analysis of visual motion and differ...
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...
Active Visual Inference of Surface Shape - Roberto Cipolla Part 13 ppt
... 184 Bibliography
[ 67]
[68]
[69]
[70 ]
[71 ]
[72 ]
[73 ]
[74 ]
[75 ]
[76 ]
[77 ]
[78 ]
[79 ]
M.P. DoCarmo.
Differential Geometry of Curves and Surfaces.
Prentice-
Hall, 1 976 .
L. Dreschler ... measuring small displace-
ments of television images. IEEE Trans. on Information Theory, vol.IT-
22,no.5: 57 3-5 79 , 1 976 .
J. Callahan and R. Weiss. A model fo...
Từ khóa: