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Poster Session 2
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A New Method to make Stereoscopic Animation and Their Application
An application of stereoscopic animations for lineament extraction.
It can be said from the results shown in the previous section that it is necessary to use many different B/H ratio stereoscopic images to extract the greatest amount of lineaments. But in practice, it is very difficult to use many stereoscopic images. In order to resolve this problem, a new kind of stereoscopic animation has been proposed here. In the stereoscopic animation called stereoscopic animation of rising mountains, the mountains as virtual images rise or sink slowly by changing the B/H ratio of the component stereoscopic images gradually.
Figure 10 to 12 shows one example of this kind of animation. Whit dot lines on these images show the position of already confirmed faults. These positions are very useful for finding new lineaments. Figure 10 shows stereoscopic images of low mountains made using a small B/H ratio. In figure 11, the mountains rise a little. In figure 12, the mountain rise much more. Inserting many more stereoscopic images of different B/H ratio, this animation can be completed. Slow motion or step motion of the stereoscopic animation is necessary to find new lineaments carefully.
Figure.10 Stereoscopic images of low mountains
Figure.11 The mountains rise a little
Figure.12 The moutains rise much more
Conclusion
A new method for making stereoscopic animation has been developed by using a newly found ortho-images production method which has the ability to extract both an ortho-image and a DEM from the same stereoscopic images at the same time. Because of this ability, the developed method can make stereoscopic animations from experiments images directly and easily. In the field of lineaments extraction, two experiments have been carried out, and the result shows that it is necessary to use many different B/H ratio stereoscopic images to extract the greatest amount of lineaments. However it is very difficult to use many stereoscopic images. In order to resolve this problem, a new type of stereoscopic animation has been proposed. The animation is made by changing B/H ratio of components stereoscopic images gradually, and mountains in the animation look like they are rising are sinking. These stereoscopic animation can be used effectively in many fields where detailed topographic information is important.
References
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N.Mori, H.Takaoka, K.Tonoike, J.Komai, S.Murai, 1988; Investigation of the Effectiveness and Application of Japanese ERS-1 Stereoscopic Images; ISPRS, Kyoto, Japan, Vol.27, Com.1, pp.109-119
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N.Mori, 1997; An Ortho-image Production Method from Stereoscopic Images; ACRS, Kuala Lumpur, Malaysia, pp.I.6.1-I.6.6
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N.Mori, 1998; A New Method to Make Ortho-Images and Stereoscopic Animation; ISPRS, Hakodate, Japan, Vol.32, Part 5, pp894-899
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