Almost always, the current state of an archeological find is degraded: to propose possible reconstruction of the original color of the object is a normal activity for archeologists or art historian. The reconstruction of a faithful representation of the actual color of an artifact is often just a first step towards the understanding of the original aspect of the object.
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By using the color data from the calibrated images, it is possible to generate detailed, artifact free per-vertex color encoding, fill an existing texture parametrization or generate an entirely new texture mapping, driven by the photographic coverage. To this aim, MeshLab offers different color mapping tools to better cope with the different needs of the various datasets. An interesting possibility is to use also unconventional photos, like photos with annotations, historical photos or even near-visible lighting photos (ultraviolet, multispectral, infrared, thermography….) The spatial exploration of the georeferenced photographic set is a powerful tool but, in many applications, it is needed to have the color information mapped onto the geometry. The photos aligned in this way may be spatially-explored directly in the 3D space, instead of browsing a folder on the disk, looking at the photos like see-through transparencies suspended in space or projected onto the surface. The first step in the color management, is to align photos to the 3D model, this operation is possible in MeshLab in a short time by using a very simple interface. This paper shows the basic operations available and present actual projects were this tools have been successfully used. MeshLab offers state of the art tools for the generation and processing of color information on a high resolution 3D model. Since a complete reconstruction of the optical properties of an artifact is still hard to achieve, what is normally done is to rely on color data coming from photographic dataset.
Just drag the file onto this browser window and drop it.Even if a precise, detailed geometry is essential for the study and documentation of a CH artifact, lots of information also comes from the color and appearance data. You can also display a OBJ file directly in the browser. Then click "Open with" and choose an application. If you cannot open your OBJ file correctly, try to right-click or long-press the file.
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Without proper software you will receive a Windows message " How do you want to open this file?" or " Windows cannot open this file" or a similar Mac/iPhone/Android alert. You need a suitable software like 3ds MAX to open an OBJ file.
When opened, the file will appear as lines of information written in ASCII.
Vertices are stored in a counter-clockwise order by default. It's an open file format that allowed it to become widely adopted by 3D graphics application vendors.įile structure: The file format itself is a simple data format that represents 3D geometry - namely, the position of each vertex, the UV position of each texture coordinate vertex, vertex normals, and the faces that make each polygon defined as a list of vertices and texture vertices. OBJ is a geometry definition file format developed by Wavefront Technologies. OBJ files mostly belong to 3ds MAX by Autodesk.
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