boost::gil::subimage_view

template<typename View>
View
subimage_view(
    View const& src,
    View::point_t const& topleft,
    View::point_t const& dimensions);

template<typename... Views>
any_image_view<Views...>
subimage_view(
    any_image_view<Views...> const& src,
    point_t const& topleft,
    point_t const& dimensions);

template<typename View>
View
subimage_view(
    View const& src,
    View::coord_t x_min,
    View::coord_t y_min,
    View::coord_t width,
    View::coord_t height);

template<typename... Views>
any_image_view<Views...>
subimage_view(
    any_image_view<Views...> const& src,
    std::ptrdiff_t x_min,
    std::ptrdiff_t y_min,
    std::ptrdiff_t width,
    std::ptrdiff_t height);