erode()

MAYAFLUX_API double MayaFlux::Kinesis::Discrete::erode ( std::span< const double >  window, std::span< const double >  coefs  )

noexcept

Minimum over the window of window[k] - coefs[k], the grayscale erosion.

Definition at line 391 of file Kernels.cpp.

{
    const size_t count = std::min(window.size(), coefs.size());
    if (count == 0)
        return 0.0;
 
    double b0 = window[0] - coefs[0];
    double b1 = b0;
    double b2 = b0;
    double b3 = b0;
    size_t k = 1;
    for (; k + 4 <= count; k += 4) {
        b0 = std::min(b0, window[k] - coefs[k]);
        b1 = std::min(b1, window[k + 1] - coefs[k + 1]);
        b2 = std::min(b2, window[k + 2] - coefs[k + 2]);
        b3 = std::min(b3, window[k + 3] - coefs[k + 3]);
    }
    for (; k < count; ++k)
        b0 = std::min(b0, window[k] - coefs[k]);
    return std::min(std::min(b0, b1), std::min(b2, b3));
}

References count, and window.