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    return 1 << exponent;
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    return 1 << exponent;
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}
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}
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// Algorithm
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// Algorithm
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AlgorithmGrayCode::AlgorithmGrayCode(unsigned int _screenCols, unsigned int _screenRows, CodingDir _dir) : Algorithm(_screenCols, _screenRows, _dir){
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AlgorithmGrayCode::AlgorithmGrayCode(unsigned int _screenCols, unsigned int _screenRows) : Algorithm(_screenCols, _screenRows){
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    // on/off patterns
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    Nbits = ceilf(log2f((float)screenCols));
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    Nbits = ceilf(log2f((float)screenCols));
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    N = 2 + Nbits*2;
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    N = 2 + Nbits*2;
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    // all on pattern
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    // all on pattern
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    cv::Mat allOn(1, screenCols, CV_8UC3, cv::Scalar::all(255));
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    cv::Mat allOn(1, screenCols, CV_8UC3, cv::Scalar::all(255));