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Introduction to 3D point clouds

What is a 3D Point Cloud ? A 3D point cloud is a list of cartesian coordinates X, Y and Z representing the geometry of a scene.  Generally composed of millions or billions of points, they are accurate digital representations of the real world. These coordinates correspond to the actual size of objects. Thus, we […]

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How we evaluate the performances of our classification softwares

People often wonder what the success rate (or the accuracy) of our automated classification softwares are. Unfortunately, there is no straightforward answer to that question. In this article, we describe what we think is the most scientific way to assess a classification performance and how some of our clients choose to complement the quantitative indices with […]

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Automated PCRS (urban GIS database)

Terra3D has developed powerful automated tools for automatic urban and road point cloud analysis. These tools can be used to create GIS vector data bases. In particular it can be used to match the PCRS (which stands for Plan Corps de Rue Simplifié) PCRS PCRS is a norm that defines GIS vector maps for urban […]

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From Paris to Fontainebleau

At Terra3D we love ping pong. But more than that we really (really) love cycling. Besides, we also have two sites in Parisian region : one at Paris, in the heart of the city of love, and another in Fontainebleau, a city renowned for the forest of Fontainebleau and for the historic Chateau de Fontainebleau, just […]

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A convolution operator for point clouds

Deep learning has revolutionized computer vision and Convolutional Neural Networks (CNN) now produce some great results on tasks like semantic classification and object segmentation for 2D images. Convolution is the fundamental building block of a neural network for image processing, but its definition is not directly adapted to point cloud processing. In this article, we […]

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DTM (Digital Terrain Modeling)

DTM stands for Digital Terrain Modeling, it consist of creating a 3D representation of a terrain surface. Terra3D has developed automated tools for DTM generation from 3D point cloud data. Our technology work with a wide range of input data : Aerial and UAV laser scanning and photogrammetry. Terrestrial LiDAR mobile mapping. Terrestrial LiDAR static […]

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Real-time rendering of 3D point clouds

References H. Bouchiba, J-E. Deschaud and F. Goulette, (2018). « Raw point cloud deferred shading through screen space pyramidal operators ». Short paper. Eurographics 2018, the 39th Annual Conference of the European Association for Computer Graphics. Delft, Netherlands

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Aerial and UAV point cloud automated processing

Terra3D expertise has been applied to high voltage electric lines asset management. We developed software to classify automatically aerial point clouds. This classification has been then used to compute lines model. This model can then be used to check if the vegetation if far enough from the lines.

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