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Recognize 3D objects when only trained on 2D image and text pairs with PointCLIP

Recognize 3D objects when only trained on 2D image and text pairs with PointCLIP


PointCLIP: Point Cloud Understanding by CLIP



... explored that whether CLIP, pre-trained by large-scale image-text pairs in 2D, can be generalized to 3D recognition.


... proposing PointCLIP, which conducts alignment between CLIP-encoded point cloud and 3D category texts.


... encode a point cloud by projecting it into multi-view depth maps without rendering, and aggregate the view-wise zero-shot prediction to achieve knowledge transfer from 2D to 3D.


... By simple ensembling, PointCLIP boosts baseline's performance and even surpasses state-of-the-art models.


Therefore, PointCLIP is a promising alternative for effective 3D point cloud understanding via CLIP under low resource cost and data regime.


... experiments on widely-adopted ModelNet10, ModelNet40 and the challenging ScanObjectNN to demonstrate the effectiveness of PointCLIP. ...



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