Graphics Reference
In-Depth Information
I
1
I
2
Figure 5.32.
The square appears to move five pixels to the right between the left and right
images.
5.22 Which generally has a larger disparity: a small object close to the camera, or
a large object far from the camera?
5.23 Consider the rows of pixels
A
,
B
, and
C
in Figure
5.33
.
a) Compute the Birchfield-Tomasi measure between rows
A
and
B
at the
highlighted pixels, assuming a 1
1 window.
b) Compute the Birchfield-Tomasi measure between rows
A
and
C
at the
highlighted pixels, assuming a 1
×
×
1 window.
c)
Interpret the results. Why do they show that the Birchfield-Tomasi
measure is insensitive to differences in sampling of up to half a pixel?
80
90
100
110
120
70
80
90
100
110
85
95
105
115
125
A
B
C
Figure 5.33.
Three rows of pixels.
5.24 Construct a simple example in which a winner-take-all strategy for stereo
correspondence results in multiple pixels in
I
1
matching to the same
pixel in
I
2
.
5.25
Showhow four different orderings of the three labeled objects in Figure
5.34
can be obtained by cameras placed below the dotted line.
3
2
1
Figure 5.34.
An overhead view of three round objects.
