Title: Qonvolution: Towards Learning of High-Frequency Signals with Queried Convolution
Primary area: generative models
Keywords: High-Frequency Learning, Novel View Synthesis, Regression

Abstract: Accurately learning high-frequency signals is a challenge in computer vision and graphics, as neural networks often struggle with these signals due to spectral bias or optimization difficulties. While current techniques like Fourier features have made great strides in improving performance, there remains scope of improvement when presented with high-frequency information. This paper introduces Queried-Convolutions (Qonvolutions), a simple yet powerful modification using the neighborhood properties of convolution. Qonvolution convolves a low-frequency signal with queries (such as coordinates) to enhance the learning of intricate high-frequency signals. We empirically demonstrate that Qonvolutions enhance performance across a variety of high-frequency learning tasks crucial to both the computer vision and graphics communities, including 1D regression, 2D super resolution, 2D image regression, and novel view synthesis (NVS). In particular, by combining Gaussian splatting with Qonvolutions for NVS, we showcase state-of-the-art performance on real-world complex scenes, even outperforming powerful radiance field models on image quality. Our code and models will be made publicly available.

TL;DR: This paper improves learning of high frequency signals through convolving queries and the low frequency signals.