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Orientation Measurement and Bundle Adjustment in ELCOVISION 10 The picture orientation is the second step int the photogrammetric measurement process. Here the program computes the points of view of the cameras at the time the photo was taken. During orientation the pictures can be combined together in any order. ELCOVISION 10 does not need any further information like approximate values for the camera point of view for the orientation process. As welcome by-product the so-called new points are computed. These points are the very exactly computed 3D coordinates of the object points used for the orientation. These points are very usefull e.g. as a skeleton for the CAD drawing. The following methods of orientation measurements are available in ELCOVISION 10: Mono Photo Orientation The point of view of an individual photo is computed. However no coordinates of new points are computed. Model Orientation This is the preferential method of orientation. The points of view of a pair of pictures e.g. a left and right picture or an upper and lower picture are computed. Apart from the coordinates of the picture points of view also the coordinates of the new points are computed. An Example of a Model Orientation
There are at least 5 equal so-called homologous points measured in the left and right picture. The gauge rod gives us the scale information. After the model orientation we see the result in the ELCOVISION 10 project manager:  The result of the model orientation The point of view of the two photographs and the 3D coordinates of the measured orienting points were computed. After we add some more pairs of pictures to this model we get a photo block:  The photo block Final global orientation (bundle adjustment) with up to 1000 pictures ensures a homogeneous accuracy level by the entire photo block. All measurements and scale information are computed balanced with each other and a homogeneous photo block results. Also possible measuring errors or point mistakes are uncovered and displayed to the user. The global orientation of ELCOVISON 10 can also calibrate cameras simultaneous. This enables you to add pictures of unknown cameras like monitoring cameras, historical photographs etc. to the photo block. |
