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RSS FeedsRemote Sensing, Vol. 13, Pages 4917: Point Projection Network: A Multi-View-Based Point Completion Network with Encoder-Decoder Architecture (Remote Sensing)

 
 

3 december 2021 21:59:18

 
Remote Sensing, Vol. 13, Pages 4917: Point Projection Network: A Multi-View-Based Point Completion Network with Encoder-Decoder Architecture (Remote Sensing)
 


Recently, unstructured 3D point clouds have been widely used in remote sensing application. However, inevitable is the appearance of an incomplete point cloud, primarily due to the angle of view and blocking limitations. Therefore, point cloud completion is an urgent problem in point cloud data applications. Most existing deep learning methods first generate rough frameworks through the global characteristics of incomplete point clouds, and then generate complete point clouds by refining the framework. However, such point clouds are undesirably biased toward average existing objects, meaning that the completion results lack local details. Thus, we propose a multi-view-based shape-preserving point completion network with an encoder–decoder architecture, termed a point projection network (PP-Net). PP-Net completes and optimizes the defective point cloud in a projection-to-shape manner in two stages. First, a new feature point extraction method is applied to the projection of a point cloud, to extract feature points in multiple directions. Second, more realistic complete point clouds with finer profiles are yielded by encoding and decoding the feature points from the first stage. Meanwhile, the projection loss in multiple directions and adversarial loss are combined to optimize the model parameters. Qualitative and quantitative experiments on the ShapeNet dataset indicate that our method achieves good results in learning-based point cloud shape completion methods in terms of chamfer distance (CD) error. Furthermore, PP-Net is robust to the deletion of multiple parts and different levels of incomplete data.


 
69 viewsCategory: Geology, Physics
 
Remote Sensing, Vol. 13, Pages 4919: A Specific Emitter Identification Algorithm under Zero Sample Condition Based on Metric Learning (Remote Sensing)
Remote Sensing, Vol. 13, Pages 4913: Orthorectification of Helicopter-Borne High Resolution Experimental Burn Observation from Infra Red Handheld Imagers (Remote Sensing)
 
 
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