POINT CLOUD PROCESS       3D MODELING      REVERSE ENGINEERING        CONTROL AND 3D INSPECTION
 

Texture Mapping...

 

This optional module allows you to map a photographic picture of an object on the corresponding 3D model. According to the data you have, there are two correlated ways to apply the image or texture onto the 3D model.

Reference points
The position, the orientation and the optical parameters of the camera are determined with some point couples. Each couple is made of one point on the 3D surface and the corresponding point on the image that you select by simply clicking (3 to 5 points are sufficient).

Camera definition
You can fill in the photogrammetric parameters (lens distortion, origin and orientation of the camera, size of the pixels...) whether it is for aerial photogrammetry (OPK and POK references) or terrestrial. You will get a very accurate mapping of the texture onto the 3D model.

In the texturing module, you can:

- Preserve the projection data so that the texture mapping can be replayed if the 3D model changes.
- Use more than one image to texture one 3D object.
- Export the 3D textured models to other applications (OBJ, VRML or WRL).
- Choose several options to adjust the quality and the number of textured triangles according to their visibility from the camera: totally visible, partially visible, totally hidden.

Texturing Watch the demonstration video.

 

It is also possible to adjust the texture or to manually choose which texture will be selected for each triangle, or to delineate the area where the texture will be applied. Thus, you control the mapping and improve the junctions between pictures if necessary.

Texture adjustment Watch the demonstration video.

 

Also available in the texturing module:

The texture material. This function enables you to texture a model with a pattern which will be repeated several times according to a direction. This feature is very interesting when it comes to texture an object in a homogeneous and repetitive way, such as a civil engineering structure, a wooden ground or a consumer good (the texture of a repetitive pattern can also be adjusted)...

 

The camera definition can be saved separately from the location and orientation. You can fix the parameters that you know such as the focal length, the lens distortion, etc. and compute only the unknown parameters like the camera origin and/or the camera orientation.

 

The pictures taken with fisheye lenses which have a short-length focal distance can be used for texturing, giving hemispheric projection. Reshaper automatically determines which projection model should be applied: perspective projection for standard camera images, equirectangular projection for full panoramic 360x180 pictures or hemispheric projection for camera with fisheye lens.

 

Otho-image
With 3DReshaper, you easily export the textured image in BMP or JPEG file formats with an associated text file, containing the calibration data: the matrix of transition from the 3D scene and the 2D image, coordinates of the four corners of the image, depth, size of the pixels...

Thus, it will be possible to work on the ortho-image in another software application. The calibration file places the textured image in the proper coordinate system.

 


Mesh Coloration

Mesh coloration with 3DReshaper is a standard function which allows keeping the original colors of a 3D digitalization: from a colored point cloud.

3DReshaper is able to produce automatically a colored mesh, that will be thus more detailed and realistic.

Select both the mesh and the corresponding point cloud and launch the command.

Projection of 2D images on 3D model

Textured mesh

Texturing of a roman water tower, located in the south of France (courtesy of Leica France).

Texture adjustment

The texture adjustment displays by colors the zones where each picture has been projected. Thanks to different kind of tools, it is easy to delineate the projection zone of the picture (courtesy of Helimap).
Repetitive texture

Repetitive texture according to an axis. Select the number of repetitions.

Fisheye pictures

Example of an image taken using a "circular" fisheye lens (from Zenith Scan)

 

 

 

Point cloud color applied on a mesh

Mesh coloration : you can easily give to your 3D mesh the colours of your point cloud with a simple click.

 
 

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