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.