combination_sampler.h

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// ----------------------------------------------------------------------------
// -                        CloudViewer: www.cloudViewer.org                  -
// ----------------------------------------------------------------------------
// Copyright (c) 2018-2024 www.cloudViewer.org
// SPDX-License-Identifier: MIT
// ----------------------------------------------------------------------------
 
#pragma once
 
#include "optim/sampler.h"
 
namespace colmap {
 
// Random sampler for RANSAC-based methods that generates unique samples.
//
// Note that a separate sampler should be instantiated per thread and it assumes
// that the input data is shuffled in advance.
class CombinationSampler : public Sampler {
public:
    explicit CombinationSampler(const size_t num_samples);
 
    void Initialize(const size_t total_num_samples) override;
 
    size_t MaxNumSamples() override;
 
    std::vector<size_t> Sample() override;
 
private:
    const size_t num_samples_;
    std::vector<size_t> total_sample_idxs_;
};
 
}  // namespace colmap