FKAConv: Feature-Kernel Alignment for Point Cloud Convolution
This work addresses point cloud processing for computer vision applications, presenting an incremental improvement over existing methods.
The paper tackled the problem of point cloud processing by proposing a new convolution variant that separates kernel weight estimation from spatial alignment and an efficient sampling strategy, achieving competitive results on classification and semantic segmentation benchmarks with improved time and memory efficiency.
Recent state-of-the-art methods for point cloud processing are based on the notion of point convolution, for which several approaches have been proposed. In this paper, inspired by discrete convolution in image processing, we provide a formulation to relate and analyze a number of point convolution methods. We also propose our own convolution variant, that separates the estimation of geometry-less kernel weights and their alignment to the spatial support of features. Additionally, we define a point sampling strategy for convolution that is both effective and fast. Finally, using our convolution and sampling strategy, we show competitive results on classification and semantic segmentation benchmarks while being time and memory efficient.