源码：

void wave_sawtooth(cv::Mat& src,cv::Mat& dst,double amplitude,double wavelength)
{
    dst.create(src.rows, src.cols, CV_8UC3);
    dst.setTo(0);

    double xAmplitude = amplitude;
    double yAmplitude = amplitude;
    int xWavelength = wavelength;
    int yWavelength = wavelength;

    for (int h = 0; h < dst.rows; h ++) {
        double fh = 1.0 * (h % yWavelength) / yWavelength;

         fh = h + yAmplitude * fh;

         int nh = floor(fh);
        if (nh < 0 || nh > dst.rows - 1)
            nh = h;

        for (int w = 0; w < dst.cols; w ++) {
            double fw  = 1.0 * (w % xWavelength) / xWavelength;

            fw = w + xAmplitude * fw;

             int nw = floor(fw);
            if (nw < 0 || nw > dst.cols - 1)
                nw = w;

            dst.at<Vec3b>(h, w)[0] = src.at<Vec3b>(nh, nw)[0];
            dst.at<Vec3b>(h, w)[1] = src.at<Vec3b>(nh, nw)[1];
            dst.at<Vec3b>(h, w)[2] = src.at<Vec3b>(nh, nw)[2];
        }
    }
}

源图像：

 当amplitude=50，wavelength = 50时的效果：