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The major problem for the satellite image-generated point clouds is the high level structured noise. It is seen that we can generate fairly robust and detailed results even if the point cloud is very noisy. present a reliable and effective approach for building model reconstruction In order to analyze the advantages and disadvantages of different 3D reconstruction methods, a series of experiments are used for comparison. [Nov 24, 2016] I am giving talks at MIT (Brain and Cognitive Sciences Department and CSAIL), on 3D object reconstruction and abstraction by deep learning. Building models with complex roof shapes and various roof shapes under complex scenes are successfully created. As such, we propose a multi-cue hierarchical RANSAC technique based on color, shape, and normal to determine their parameters from the shape-labeled point cloud. Errors are due to the roof shape segmentation module. (2016)) fulfills the requirement to be the segmentation model. The proposed framework performs better than state-of-the-art approaches in terms of computational time as well as face recognition accuracy. (2018) apply a DNN to object classification in a LiDAR point cloud. For instance, Xiong et al. The loss function is the cross-entropy loss. We conduct extensive experiments on the ShapeNet dataset and find that our reconstruction method significantly outperforms the previous state-of-the-art single-view 3D reconstruction networks in term of the accuracy of camera poses and depth maps, without requiring objects being completely symmetric. A deep neural network that takes the 2D orientation field and outputs generated hair strands (in a form of sequences of 3D points). ∙ Wang et al. In this paper, a novel 3D face reconstruction technique is proposed along with a sequential deep learning-based framework for face recognition. The reconstructed roof structure is then composed by the combination of lower level features. During the test phase, given a point cloud for the whole AOIs, we first run cluster extraction method in PCL (Alexa et al. Pix2Vox: Context-Aware 3D Reconstruction From Single and Multi-View Images, Voxel-based 3D face reconstruction and its application to face recognition using sequential deep learning, DeepHuman: 3D Human Reconstruction From a Single Image, 3D Scene Reconstruction With Multi-Layer Depth and Epipolar Transformers, A Grid-Based Secure Product Data Exchange for Cloud-Based Collaborative Design, Conditional Single-View Shape Generation for Multi-View Stereo Reconstruction, Learning Implicit Fields for Generative Shape Modeling, Learning to Reconstruct People in Clothing From a Single RGB Camera, DeepSDF: Learning Continuous Signed Distance Functions for Shape Representation, Learning to Detect 3D Reflection Symmetry for Single-View Reconstruction, A Simple and Scalable Shape Representation for 3D Reconstruction, Deep Mesh Reconstruction from Single RGB Images via Topology Modification Networks, MeshSDF: Differentiable Iso-Surface Extraction, CoReNet: Coherent 3D scene reconstruction from a single RGB image. communities, © 2019 Deep AI, Inc. | San Francisco Bay Area | All rights reserved. As mentioned before, the first step is the actual preprocessing of the image where the authors want to obtain the 2D orientation field but only of the hair region part. 3D shape representations that accommodate learning-based 3D reconstruction are an open problem in machine learning and computer graphics. The actual height of each point with respect to the flat plane of height h0 reflects the noise of the point cloud. The solved model is then tested through all the points in the point cloud to see how well the model fits the point cloud. We visualize the results in Fig. © 2008-2020 ResearchGate GmbH. However, due the high, orbital altitude of satellite observation, the 3D point clouds in urban areas generated from multi-view satellite images suffer from a high level of structured noise and voids, both of which can be more severe than in airborne data. For points that have the same shape type within each point cluster, a hierarchical RANSAC method is proposed to extract the primitive shape with location, size and orientation(step 3) to fit the points. share, Geographic information systems (GIS) now provide accurate maps of terrai... The proposed RANSAC method incorporates shape, surface normal, and color information from multiple scales and shows high accuracy and efficiency in dealing with the noisy point cloud. We also handle occlusions and resolve them by hallucinating the missing object parts in the 3D volume. A deep learning based roof shape segmentation … The support vector machine is applied to deep features for the final prediction. The implementation of the proposed algorithm is publicly available as an open-source software and can be deployed as an automatic service in Amazon Web Services. ∙ In the subsequent step, we further proposed a multi-cue hierarchical RANSAC to reliably extract roof primitives from the roof shape segmentation results. However, the final 3D reconstruction model is still inferior than that constructed from aerial image and LiDAR. Moving least squares fitting and median filtering were necessary and could effectively suppress the intrinsic noise in the input point clouds. By using a well-designed encoder-decoder, it generates a coarse 3D volume from each input image. AOI 1 is selected from the campus of the University of California, San Diego (UCSD), California. It tests if the algorithm can deal with complex building shapes. To evaluate the performance of the proposed roof shape segmentation algorithm, we manually annotate the roof shape label for all the buildings in the four aforementioned AOIs. The learning rate is reduced to 0.7 of the previous value every 20,000 steps. It met the first expectation for an end-to-end pipeline for large scale complex city modeling in a fully automated environment. We use it to test how the reconstruction algorithm handles the spherical roofs. Training the roof shape segmentation model requires hundreds of point clouds with detailed shape labels on each point. In order to effectively collect roofs with different shapes, we propose to synthesize other shapes of roofs, especially cylindrical and spherical roofs, from flat roofs. The weights for the distance and the angle between the normal vectors are given below. 03/17/2020 ∙ by Yilei Shi, et al. proposed typically relying on complex deep learning architectures for the decoder model. Given the segmented roof surfaces and local DTM, building facades can be created by draping roof edges to the ground. In fact, many data-driven methods also consider the knowledge of the roof model, such as the model primitives and the roof topology. occlusio... Imagery on Urban Scenes. To make a complex roof, 1-3 simple roofs are randomly selected and combined. To evaluate the end-to-end performance of the proposed approach, we compare our reconstruction result with the ground-truth 2D building mask and the ground-truth DSM. Specifically, we render the reconstructed 3D building model back to a 2D binary building mask and a 3D DSM on top of the DTM and compare the ground truth of the 2D building mask and DSM.