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+#pragma once
+
+#include <opencv2/core.hpp>
+#include <limits>
+
+namespace types {
+ using f = double;
+
+ struct constants final
+ {
+ constants() = delete;
+ static constexpr f eps = std::numeric_limits<f>::epsilon();
+ };
+
+ template<int n> using vec = cv::Vec<f, n>;
+ using vec2 = vec<2>;
+ using vec3 = vec<3>;
+
+ template<int y, int x> using mat = cv::Matx<f, y, x>;
+ using mat33 = mat<3, 3>;
+ using mat22 = mat<2, 2>;
+}