Estimate Pose
This function allows you to estimate the position and orientation of a picture coming from a camera.
Requirements
Select the image (perspective, spherical or unknown) whom attitude has to be computed.
The view is automatically split into two parts in order to have the selected image on the left and the mesh to texture on the right.
If the image projection type is unknown, define it: perspective or spherical pano.
Otherwise, you may want to keep previous internal or external parameters. For example, when your camera has been calibrated by Calibrate Camera.
Give a point in the image view and its corresponding position in the 3D view to define point pairs.
A computation is launched when 4 pairs have been defined (it is advised to define more pairs, especially when working out lens distortions).
Adjust the computation by removing (DEL key or red cross) or deactivating pairs.
Optionally, export or import pairs in a text file.
Finally, check the result using go to camera view point and the transparency slider.
Notes
The tangential distortions are not estimated during the computation.
The ASCII format used to store pairs of points is one pair per line: "X Y Z U V I J K Name" Where X, Y and Z are the coordinates of the point in the 3D scene, U V are the coordinates of the point on the image (between 0 and 1 - 0/0 being the top left of the image and 1/1 being the bottom right), I J K define the vector from which the points are clicked and the name being the name of the point.
Practise
See the Exercise: Texture a mesh with reference points in the beginners guide section.