78 lines
2.9 KiB
C
78 lines
2.9 KiB
C
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// Ceres Solver - A fast non-linear least squares minimizer
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// Copyright 2015 Google Inc. All rights reserved.
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// http://ceres-solver.org/
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// * Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * Neither the name of Google Inc. nor the names of its contributors may be
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// used to endorse or promote products derived from this software without
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// specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// Author: sameeragarwal@google.com (Sameer Agarwal)
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#ifndef CERES_INTERNAL_LINE_SEARCH_MINIMIZER_H_
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#define CERES_INTERNAL_LINE_SEARCH_MINIMIZER_H_
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#include "ceres/minimizer.h"
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#include "ceres/solver.h"
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#include "ceres/types.h"
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#include "ceres/internal/eigen.h"
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#include "glog/logging.h"
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namespace ceres {
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namespace internal {
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// Generic line search minimization algorithm.
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//
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// For example usage, see SolverImpl::Minimize.
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class LineSearchMinimizer : public Minimizer {
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public:
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struct State {
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State(int num_parameters,
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int num_effective_parameters)
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: cost(0.0),
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gradient(num_effective_parameters),
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gradient_squared_norm(0.0),
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search_direction(num_effective_parameters),
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directional_derivative(0.0),
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step_size(0.0) {
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}
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double cost;
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Vector gradient;
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double gradient_squared_norm;
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double gradient_max_norm;
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Vector search_direction;
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double directional_derivative;
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double step_size;
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};
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~LineSearchMinimizer() {}
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virtual void Minimize(const Minimizer::Options& options,
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double* parameters,
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Solver::Summary* summary);
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};
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} // namespace internal
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} // namespace ceres
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#endif // CERES_INTERNAL_LINE_SEARCH_MINIMIZER_H_
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