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What is: Fast Voxel Query?

SourceVoxel Transformer for 3D Object Detection
Year2000
Data SourceCC BY-SA - https://paperswithcode.com

Fast Voxel Query is a module used in the Voxel Transformer 3D object detection model implementation of self-attention, specifically Local and Dilated Attention. For each querying index v_iv\_{i}, an attending voxel index v_jv\_{j} is determined by Local and Dilated Attention. Then we can lookup the non-empty index jj in the hash table with hashed v_jv\_{j} as the key. Finally, the non-empty index jj is used to gather the attending feature f_jf\_{j} from F\mathcal{F} for multi-head attention.