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A Gradient Descent Trust Region Optimizer

Brooks, Rupert
Elekta LTD, Soft Tissue Imaging
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Please use this identifier to cite or link to this publication: http://hdl.handle.net/10380/3310
New: Prefer using the following doi: https://doi.org/10.54294/f5gzka
Published in The Insight Journal - 2011 July-December.
Submitted by Rupert Brooks on 2011-08-11 07:25:35.

This document describes a new simple gradient descent optimizer which is a potential replacement or supplement for RegularStepGradientDescentOptimizer. The optimizer requires only the gradient of the parameters and uses a simple linear model internally. However, it follows the theoretical basis of a trust-region algorithm and is able to achieve greater efficiency on certain image registration cases.