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#ifndef ALGORITHMTOOLS_H
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#ifndef ALGORITHMTOOLS_H
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#define ALGORITHMTOOLS_H
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#define ALGORITHMTOOLS_H
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#include <opencv2/opencv.hpp>
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#include <opencv2/opencv.hpp>
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#include <opencv2/core/ocl.hpp>
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#include <QTime>
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// Convert an unsigned binary number to reflected binary Gray code.
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// Convert an unsigned binary number to reflected binary Gray code.
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// Source: http://en.wikipedia.org/wiki/Gray_code
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// Source: http://en.wikipedia.org/wiki/Gray_code
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inline unsigned int binaryToGray(unsigned int num) {
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inline unsigned int binaryToGray(unsigned int num) {
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    return (num >> 1) ^ num;
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    return (num >> 1) ^ num;
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    cv::merge(frames, I);
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    cv::merge(frames, I);
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    unsigned int w = I.cols;
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    unsigned int w = I.cols;
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    unsigned int h = I.rows;
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    unsigned int h = I.rows;
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    I = I.reshape(1, h*w);
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    I = I.reshape(1, h*w);
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    I.convertTo(I, CV_32F);
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    I.convertTo(I, CV_32F);
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    QTime time;
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    time.start();
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    cv::Mat fI;
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    cv::Mat fI;
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    cv::dft(I, fI, cv::DFT_ROWS + cv::DFT_COMPLEX_OUTPUT);
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    cv::dft(I, fI, cv::DFT_ROWS + cv::DFT_COMPLEX_OUTPUT);
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    std::cout << "elapsed: " << time.restart() << std::endl;
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    fI = fI.reshape(N*2, h);
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    fI = fI.reshape(N*2, h);
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    std::vector<cv::Mat> fIcomp;
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    std::vector<cv::Mat> fIcomp;
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    cv::split(fI, fIcomp);
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    cv::split(fI, fIcomp);
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