Function threshold

examples/image_processing/binary_thresholding.cpp:17–24

using namespace af;

array threshold(const array& in, float thresholdValue) {
    int channels  = in.dims(2);
    array ret_val = in.copy();
    if (channels > 1) ret_val = colorSpace(in, AF_GRAY, AF_RGB);
    ret_val =
        (ret_val < thresholdValue) * 0.0f + 255.0f * (ret_val > thresholdValue);
    return ret_val;
}

/**
 * Note: