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Topic: Natural Scenes Dataset

Seminar
2 seminars

In Artificial Intelligence and Biology

Seminar · Computational Neuroscience

NMC4 Short Talk: Hypothesis-neutral response-optimized models of higher-order visual cortex reveal strong semantic selectivity

Meenakshi Khosla · Massachusetts Institute of Technology

Wed, Dec 1, 2021 · 11:15 UTC

Modeling neural responses to naturalistic stimuli has been instrumental in advancing our understanding of the visual system. Dominant computational modeling efforts in this direction have been deeply rooted in preconceived hypotheses. In contrast, hypothesis-neutral computational methodologies with minimal apriorism which bring neuroscience data directly to bear on the model development process are likely to be much more flexible and effective in modeling and understanding tuning properties throughout the visual system. In this study, we develop a hypothesis-neutral approach and characterize r

Seminar · Computational Neuroscience

NMC4 Short Talk: Image embeddings informed by natural language improve predictions and understanding of human higher-level visual cortex

Aria Wang · Carnegie Mellon University

Wed, Dec 1, 2021 · 11:00 UTC

To better understand human scene understanding, we extracted features from images using CLIP, a neural network model of visual concept trained with supervision from natural language. We then constructed voxelwise encoding models to explain whole brain responses arising from viewing natural images from the Natural Scenes Dataset (NSD) - a large-scale fMRI dataset collected at 7T. Our results reveal that CLIP, as compared to convolution based image classification models such as ResNet or AlexNet, as well as language models such as BERT, gives rise to representations that enable better prediction