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    return phase;
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    return phase;
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}
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}
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// Phase unwrapping by means of a phase cue
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// Phase unwrapping by means of a phase cue
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inline cv::Mat unwrapWithCue(const cv::Mat up, const cv::Mat upCue, float nPhases){
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inline cv::Mat unwrapWithCue(const cv::Mat &up, const cv::Mat &upCue, float nPhases){
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    const float pi = M_PI;
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    const float pi = M_PI;
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    // Determine fringe order
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    // Determine fringe order
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    cv::Mat P = (upCue*nPhases-up)/(2.0*pi);
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    cv::Mat P = (upCue*nPhases-up)/(2.0*pi);
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    return upUnwrapped;
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    return upUnwrapped;
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}
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}
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// Absolute phase and magnitude from N frames
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// Absolute phase and magnitude from N frames
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inline std::vector<cv::Mat> getDFTComponents(const std::vector<cv::Mat> frames){
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inline std::vector<cv::Mat> getDFTComponents(const std::vector<cv::Mat> &frames){
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    unsigned int N = frames.size();
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    unsigned int N = frames.size();
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//    std::vector<cv::Mat> framesReverse = frames;
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//    std::vector<cv::Mat> framesReverse = frames;
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//    std::reverse(framesReverse.begin(), framesReverse.end());
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//    std::reverse(framesReverse.begin(), framesReverse.end());