The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part B4. Beijing 2008
The OpenSceneGraph is an OpenSource, cross platform
graphics toolkit for the development of high performance
graphics applications such as flight simulators, games, virtual
reality and scientific visualization.
The experiment construct image pyramid from the original
image, then carry out the stereoscopic observation based on the
application coding with OSG, rearrange the epipolar lines in
accordance with the viewpoint dynamically, measure in the
generated epipolar images.
Take the air photograph images as the tested data. The
resolution of the image is 6508 * 4888, the focal length is
34.62mm. An overview of the experimental images is show in
Figure 4, including the original stereo pair (a, b) and the
generated epipolar images (c, d).
(a) Left original image
(b) Right original image
(c) Left epipolar image
Figure 4. Experimental images (a, b) and generated epipolar images (c, d)
Calculating the fundamental matrix F, which is deduced from
the ground control points (GCP), is necessary for generating
epipolar image. Some corresponding points are selected as the
GCP. Three sets of experiments were tested using different
numbers of GCP and check points, Table 1. The square root of
the estimated variance components and the average absolute
values of the resulting y-parallax are listed in Table 1. The
means and standard deviations of the error values in the object
space are also listed in the same table.