The principal components of natural images
@article{Hancock1992ThePC,
title={The principal components of natural images},
author={Peter J. B. Hancock and Roland J. Baddeley and Leslie S. Smith},
journal={Network: Computation In Neural Systems},
year={1992},
volume={3},
pages={61-70}
}A neural net was used to analyse samples of natural images and text. For the natural images, components resemble derivatives of Gaussian operators, similar to those found in visual cortex and inferred from psychophysics. While the results from natural images do not depend on scale, those from text images are highly scale dependent. Convolution of one of the text components with an original image shows that it is sensitive to inter-word gaps.
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References
SHOWING 1-10 OF 10 REFERENCES
A statistical analysis of natural images matches psychophysically derived orientation tuning curves
- PsychologyProceedings of the Royal Society of London. Series B: Biological Sciences
- 1991
A neural net method is used to extract principal components from real-world images and two of the components are ‘bar-detectors’, which are similar to that suggested by Foster & Ward to account for brief-exposure psychophysical data.
Introduction to the theory of neural computation
- Computer ScienceThe advanced book program
- 1991
This book is a detailed, logically-developed treatment that covers the theory and uses of collective computational networks, including associative memory, feed forward networks, and unsupervised learning.
Simplified neuron model as a principal component analyzer
- BiologyJournal of mathematical biology
- 1982
A simple linear neuron model with constrained Hebbian-type synaptic modification is analyzed and a new class of unconstrained learning rules is derived. It is shown that the model neuron tends to…
Asymmetries in oriented-line detection indicate two orthogonal filters in early vision
- BiologyProceedings of the Royal Society of London. Series B: Biological Sciences
- 1991
Visual detection of a line target differing in orientation from a background of lines may be achieved speedily and effortlessly. Such performance is assumed to occur early in vision and to involve…
Optimal unsupervised learning in a single-layer linear feedforward neural network
- Computer ScienceNeural Networks
- 1989
Neuronal Operations in the Visual Cortex
- BiologyStudies of Brain Function
- 1984
The Visual System of Cat and Monkey Compared, a comparison of the Basic Layout of the Visual System in Cat, Owl Monkey, and Rhesus Monkey, reveals a similar structure to the Retinotopic Organization in the Primary Complex.
Analysis of Linsker's application of Hebbian rules to linear networks
- Computer Science
- 1990
The authors analyse the dynamics of the learning rule of a Hebb-type synaptic plasticity rule in a feedforward linear network in terms of the eigenvectors of this matrix, which represent independently evolving weight structures.
Self-organization in a perceptual network
- Computer ScienceComputer
- 1988
It is shown that even a single developing cell of a layered network exhibits a remarkable set of optimization properties that are closely related to issues in statistics, theoretical physics, adaptive signal processing, the formation of knowledge representation in artificial intelligence, and information theory.
Learning receptive elds
- IEEE International Conference on Neural Networks, (San Diego 1987), IEEE, New York,
- 1987