Relative Orientation of Unordered Close-range Images
Date Issued
2012
Date
2012
Author(s)
Hsieh, Jen-Hsuan
Abstract
The model of relative orientation of images is independent of the object coordinate system, which is different from absolute orientation. In addition, because the observations can be measured automatically or measured semi-automatically by using the technique of image matching, it has more flexibility than the model of absolute orientation. In the other side, people usually have to take the close-range images of some scene from appropriate positions and orientation in order to cover the scene. Because of the complexity of the image geometry and the diversity of the image scale, it’s a challenge to measure the correspondences and estimate the approximate value of relative orientation obviously.
As a consequence, the goal in this research is to propose an appropriate procedure to construct the relative orientation of the close-range images, which is part of irregular image block or lack of the information of sequence. At the first we use the technique of image matching to supply the observation in the essential regions and construct the relation of images pair by pair. In addition, we determine the n-fold points and using the hierarchical structure of images to integrate the unified scale and coordinate system. Finally we combine the method of liner system and the bundle adjustment to complete the relative orientation of images. Both the simulated and experimental test results reveal that the proposed approaches are applicable, and the strategy about the distribution of feature points, determination of n-fold points and the hierarchical structure of images can promote the relation of images and the quality between images and object.
Subjects
Unordered
Close-range images
Relative orientation
Image matching
Type
thesis
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