Search Results for author: Oscar Pizarro

Found 9 papers, 1 papers with code

NTKCPL: Active Learning on Top of Self-Supervised Model by Estimating True Coverage

no code implementations7 Jun 2023 Ziting Wen, Oscar Pizarro, Stefan Williams

Recent research has shown that in the context of supervised learning different active learning strategies need to be applied at various stages of the training process to ensure improved performance over the random baseline.

Active Learning Clustering +2

A Semi-supervised Object Detection Algorithm for Underwater Imagery

no code implementations7 Jun 2023 Suraj Bijjahalli, Oscar Pizarro, Stefan B. Williams

We evaluate the precision-recall tradeoff and demonstrate that by choosing an appropriate latent dimensionality and threshold, we are able to achieve an average precision of 0. 64 on unlabelled datasets.

Object object-detection +2

Improved Benthic Classification using Resolution Scaling and SymmNet Unsupervised Domain Adaptation

1 code implementation20 Mar 2023 Heather Doig, Oscar Pizarro, Stefan B. Williams

We adapt the SymmNet state-of-the-art Unsupervised Domain Adaptation method with an efficient bilinear pooling layer and image scaling to normalise spatial resolution, and show improved classification accuracy.

Unsupervised Domain Adaptation

Training from a Better Start Point: Active Self-Semi-Supervised Learning for Few Labeled Samples

no code implementations9 Mar 2022 Ziting Wen, Oscar Pizarro, Stefan Williams

Consequently, our framework can significantly improve the performance of models in the case of few annotations while reducing the training time.

Active Learning

GeoCLR: Georeference Contrastive Learning for Efficient Seafloor Image Interpretation

no code implementations13 Aug 2021 Takaki Yamada, Adam Prügel-Bennett, Stefan B. Williams, Oscar Pizarro, Blair Thornton

We demonstrate how the latent representations generated by GeoCLR can be used to efficiently guide human annotation efforts, where the semi-supervised framework improves classification accuracy by an average of 10. 2% compared to the state-of-the-art SimCLR using the same CNN and equivalent number of human annotations for training.

Contrastive Learning Transfer Learning

Feature Space Exploration For Planning Initial Benthic AUV Surveys

no code implementations25 May 2021 Jackson Shields, Oscar Pizarro, Stefan B. Williams

This research proposes methods for planning initial AUV surveys that efficiently explore a feature space representation of the bathymetry, in order to sample from a diverse set of bathymetric terrain.

Towards Adaptive Benthic Habitat Mapping

no code implementations20 Jun 2020 Jackson Shields, Oscar Pizarro, Stefan B. Williams

One such application is in benthic habitat mapping where these vehicles collect seafloor imagery that complements broadscale bathymetric data collected using sonar.

Decoding, Calibration and Rectification for Lenselet-Based Plenoptic Cameras

no code implementations CVPR 2013 Donald G. Dansereau, Oscar Pizarro, Stefan B. Williams

Results include calibration of a commercially available camera using three calibration grid sizes over five datasets.

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