Page 35 - 3DF Zephyr

The "Ok" button will now be clickable - it is possible to add as many coordinates as wanted (usually, the more coordinates the better the accuracy) and click OK to complete the control point selection. When changing the 2D position, you can see in real time the global reprojection error and the local reprojection error. The light blue border will highlight the camersa with a direct view on the selected control point while the dark blue border willl hight cameras that may show the control point as occluded. The "Pick and edit control point" function From the same menu where "Add control points from images" and "pick control point" it possible to find also the "Pick and edit control point" button: this function allows to select a control point by directly picking it on the scene (exactly like the "Pick control point" function) and then modify the position of the control point by editing its position with the "add control point from images" interface, with the control point already in place in all the possible cameras. The "Import 3D" function This tool allows to define control points by using 3D coordinates directly, without detecting any control points on images. In order to exploit this tool the 3D coordinates must have the same reference system as the workspace where the 3D model is being processed. Afterwards control points can be defined for each coordinate as needed. It is necessary to specify a reference object if users want to get the metric error between their model/cloud and the 3D coordinates; If 3D coordinates have to be considered as constraints (for instance to run a bundle adjustment optimization) it is recommended not to specify a reference object;