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2D to 3D Projection

The UPV allows the creation of custom made Projection Spheres, as described in the previous chapter. 2D Images need to be created with the Document Adapter, while 360° Panoramas are created with the Laserscan Adapter.

Creating a projection

Start UPV and select your model. Create a projection by selecting 2D to 3D Projection from the Files dropdown in the right menu.

If you do not enter a name for the projection, the selected images name will be used.

The selected image will be shown on the right and you may begin placing projection-mapping-markers on both the 2D image and in the 3D space of your model. It’s advised to position the camera in the 3D space as close as possible to the place the image was shot at, since the algorithm for the image mapping in the 3D space will calculate more than one possible orientation of the projection-sphere, but will choose the closest possible solution to the current camera position.

Mapping a projection

Button Description
Saves the current mapping marker positions and closes the projection interface.
Discards all changes to mapping marker positions and closes the projection.
Creates a colour coded mapping marker in both the 2D and 3D space. Markers can be dragged to correctly place them in both spaces. Up to 4 Markers can be placed, but at least 3 markers are usually necessary for a decent.
The upper border of the drawing view in [mm].
Focuses both 3D and 2D space on the selected marker. Current colour is last marker focused, or default red.
The upper border of the drawing view in [mm].
Recalculates the position of the projection.
Focal length Changes the focal length for the calculations. This should not be needed to be changed, as the information usually comes from the image itself.

Mapping works the same for picture, picture360 and orthogonal images.

Create a marker and drag it to its designated place in both the 2D and 3D space. Add up to 4 markers. The more markers and more precise their placement, the better the result. When you are done with marker placement, move the camera towards where the picture might have been taken to ensure proper placement of the projection. Recalculate the position.

If the image placement is still unsatisfactory, reposition the markers and recalculate until the images are properly placed.

Picture, Picture360, Orthogonal differences

Swap between Picture, Picture360 and Orthogonal by using the dropdown menu. Once a calculation has been done for the selected image, you can no longer change between the image types.

Picture

Pictures are regular 2D images projected into the 3D space. Change the focal length, if needed, on the right side of the mapping buttons. Usually, the focal length should be automatically read from the image information.

After calculating the position, the camera is locked to the projectionsphere and works the same as described in 360Panorama. Also, the following button and slider appear:

Leave the projectionsphere and use the camera as usual.
Increases opacity of the projected image.

Picture360

Picture360 are 360 panorama photos.

After calculating the position, the camera is locked to the projectionsphere and works the same as described in 360Panorama. Also, the following button and slider appear:

Leave the projectionsphere and use the camera as usual.
Increases opacity of the projected image.

Orthogonal drawing

To create a projection of an orthogonal drawing, select 2D from the breadcrumb menu and select the required drawing. It will be opened in a tab. While this tab is active, select 2D to 3D projection in the files tab of the right menu.

Select the plane the drawing should be in.

None means the plane will be spanned between the first three markers. The others describe the axis the plane is a part of (e.g. X and Y axis in the image above).