Search Results for author: Sameera Ramasinghe

Found 28 papers, 11 papers with code

From Activation to Initialization: Scaling Insights for Optimizing Neural Fields

no code implementations28 Mar 2024 Hemanth Saratchandran, Sameera Ramasinghe, Simon Lucey

In the realm of computer vision, Neural Fields have gained prominence as a contemporary tool harnessing neural networks for signal representation.

ViewFusion: Towards Multi-View Consistency via Interpolated Denoising

1 code implementation29 Feb 2024 Xianghui Yang, Yan Zuo, Sameera Ramasinghe, Loris Bazzani, Gil Avraham, Anton Van Den Hengel

Novel-view synthesis through diffusion models has demonstrated remarkable potential for generating diverse and high-quality images.

Denoising Image Generation +1

A Sampling Theory Perspective on Activations for Implicit Neural Representations

no code implementations8 Feb 2024 Hemanth Saratchandran, Sameera Ramasinghe, Violetta Shevchenko, Alexander Long, Simon Lucey

Implicit Neural Representations (INRs) have gained popularity for encoding signals as compact, differentiable entities.

LumiNet: The Bright Side of Perceptual Knowledge Distillation

1 code implementation5 Oct 2023 Md. Ismail Hossain, M M Lutfe Elahi, Sameera Ramasinghe, Ali Cheraghian, Fuad Rahman, Nabeel Mohammed, Shafin Rahman

In knowledge distillation literature, feature-based methods have dominated due to their ability to effectively tap into extensive teacher models.

Classification Knowledge Distillation +1

Robust Point Cloud Processing through Positional Embedding

1 code implementation1 Sep 2023 Jianqiao Zheng, Xueqian Li, Sameera Ramasinghe, Simon Lucey

End-to-end trained per-point embeddings are an essential ingredient of any state-of-the-art 3D point cloud processing such as detection or alignment.

Point Cloud Classification

Curvature-Aware Training for Coordinate Networks

no code implementations ICCV 2023 Hemanth Saratchandran, Shin-Fang Chng, Sameera Ramasinghe, Lachlan MacDonald, Simon Lucey

Coordinate networks are widely used in computer vision due to their ability to represent signals as compressed, continuous entities.

On the effectiveness of neural priors in modeling dynamical systems

no code implementations10 Mar 2023 Sameera Ramasinghe, Hemanth Saratchandran, Violetta Shevchenko, Simon Lucey

Modelling dynamical systems is an integral component for understanding the natural world.

BLiRF: Bandlimited Radiance Fields for Dynamic Scene Modeling

no code implementations27 Feb 2023 Sameera Ramasinghe, Violetta Shevchenko, Gil Avraham, Anton Van Den Hengel

Reasoning the 3D structure of a non-rigid dynamic scene from a single moving camera is an under-constrained problem.

Novel View Synthesis

How You Start Matters for Generalization

no code implementations17 Jun 2022 Sameera Ramasinghe, Lachlan MacDonald, Moshiur Farazi, Hemanth Saratchandran, Simon Lucey

Characterizing the remarkable generalization properties of over-parameterized neural networks remains an open problem.

Few-shot Class-incremental Learning for 3D Point Cloud Objects

1 code implementation30 May 2022 Townim Chowdhury, Ali Cheraghian, Sameera Ramasinghe, Sahar Ahmadi, Morteza Saberi, Shafin Rahman

Few-shot class-incremental learning (FSCIL) aims to incrementally fine-tune a model (trained on base classes) for a novel set of classes using a few examples without forgetting the previous training.

Few-Shot Class-Incremental Learning Incremental Learning

Trading Positional Complexity vs. Deepness in Coordinate Networks

1 code implementation18 May 2022 Jianqiao Zheng, Sameera Ramasinghe, Xueqian Li, Simon Lucey

It is well noted that coordinate-based MLPs benefit -- in terms of preserving high-frequency information -- through the encoding of coordinate positions as an array of Fourier features.

GARF: Gaussian Activated Radiance Fields for High Fidelity Reconstruction and Pose Estimation

2 code implementations12 Apr 2022 Shin-Fang Chng, Sameera Ramasinghe, Jamie Sherrah, Simon Lucey

Despite Neural Radiance Fields (NeRF) showing compelling results in photorealistic novel views synthesis of real-world scenes, most existing approaches require accurate prior camera poses.

Pose Estimation

On Regularizing Coordinate-MLPs

no code implementations1 Feb 2022 Sameera Ramasinghe, Lachlan MacDonald, Simon Lucey

We show that typical implicit regularization assumptions for deep neural networks (for regression) do not hold for coordinate-MLPs, a family of MLPs that are now ubiquitous in computer vision for representing high-frequency signals.

regression

Learning Positional Embeddings for Coordinate-MLPs

no code implementations21 Dec 2021 Sameera Ramasinghe, Simon Lucey

We propose a novel method to enhance the performance of coordinate-MLPs by learning instance-specific positional embeddings.

Memorization

Beyond Periodicity: Towards a Unifying Framework for Activations in Coordinate-MLPs

1 code implementation30 Nov 2021 Sameera Ramasinghe, Simon Lucey

Coordinate-MLPs are emerging as an effective tool for modeling multidimensional continuous signals, overcoming many drawbacks associated with discrete grid-based approximations.

Enabling equivariance for arbitrary Lie groups

1 code implementation CVPR 2022 Lachlan Ewen MacDonald, Sameera Ramasinghe, Simon Lucey

Our framework enables the implementation of group convolutions over any finite-dimensional Lie group.

Rethinking Positional Encoding

1 code implementation6 Jul 2021 Jianqiao Zheng, Sameera Ramasinghe, Simon Lucey

It is well noted that coordinate based MLPs benefit -- in terms of preserving high-frequency information -- through the encoding of coordinate positions as an array of Fourier features.

Robust normalizing flows using Bernstein-type polynomials

no code implementations6 Feb 2021 Sameera Ramasinghe, Kasun Fernando, Salman Khan, Nick Barnes

Modeling real-world distributions can often be challenging due to sample data that are subjected to perturbations, e. g., instrumentation errors, or added random noise.

Vocal Bursts Type Prediction

Rethinking conditional GAN training: An approach using geometrically structured latent manifolds

1 code implementation NeurIPS 2021 Sameera Ramasinghe, Moshiur Farazi, Salman Khan, Nick Barnes, Stephen Gould

Conditional GANs (cGAN), in their rudimentary form, suffer from critical drawbacks such as the lack of diversity in generated outputs and distortion between the latent and output manifolds.

Image-to-Image Translation Translation

Conditional Generative Modeling via Learning the Latent Space

no code implementations ICLR 2021 Sameera Ramasinghe, Kanchana Ranasinghe, Salman Khan, Nick Barnes, Stephen Gould

Although deep learning has achieved appealing results on several machine learning tasks, most of the models are deterministic at inference, limiting their application to single-modal settings.

Spectral-GANs for High-Resolution 3D Point-cloud Generation

1 code implementation4 Dec 2019 Sameera Ramasinghe, Salman Khan, Nick Barnes, Stephen Gould

Point-clouds are a popular choice for vision and graphics tasks due to their accurate shape description and direct acquisition from range-scanners.

Generative Adversarial Network Point Cloud Generation +1

Representation Learning on Unit Ball with 3D Roto-Translational Equivariance

no code implementations30 Nov 2019 Sameera Ramasinghe, Salman Khan, Nick Barnes, Stephen Gould

In this work, we propose a novel `\emph{volumetric convolution}' operation that can effectively model and convolve arbitrary functions in $\mathbb{B}^3$.

3D Object Recognition Representation Learning

A Context-aware Capsule Network for Multi-label Classification

no code implementations15 Oct 2018 Sameera Ramasinghe, C. D. Athuralya, Salman Khan

Recently proposed Capsule Network is a brain inspired architecture that brings a new paradigm to deep learning by modelling input domain variations through vector based representations.

Classification General Classification +1

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