update fixing bug #5599

samples/cpp/polynominal_equations.cpp

@@ -0,0 +1,38 @@
+ /*
+ * solves equations x^4 - x^2 = 0, and x^2 - 2x + 1 = 0
+ */
+
+#include "opencv2/core/core.hpp"
+#include <iostream>
+
+
+int main(void)
+{
+        cv::Mat coefs = (cv::Mat_<float>(1,5) << 0, 0, -1, 0, 1 );
+        std::cout << "x^4 - x^2 = 0\n\n" << "Coefficients: " << coefs << "\n" << std::endl;
+        cv::Mat r;
+
+        double prec;
+        prec = cv::solvePoly(coefs, r);
+        std::cout << "Preciseness = " << prec << std::endl;
+        std::cout << "roots after 1000 iterations:\n" << r << "\n" << std::endl;
+
+        prec = cv::solvePoly(coefs, r, 9999);
+        std::cout << "Preciseness = " << prec << std::endl;
+        std::cout << "roots after 9999 iterations:\n" << r << "\n" << std::endl;
+
+        std::cout << "\n---------------------------------------\n" << std::endl;
+
+        coefs = (cv::Mat_<float>(1,3) << 1, -2, 1 );
+        std::cout << "x^2 - 2x + 1 = 0\n\n" << "Coefficients: " << coefs << "\n" << std::endl;
+
+        prec = cv::solvePoly(coefs, r);
+        std::cout << "Preciseness = " << prec << std::endl;
+        std::cout << "roots after 1000 iterations:\n" << r << "\n" << std::endl;
+
+        prec = cv::solvePoly(coefs, r, 9999);
+        std::cout << "Preciseness = " << prec << std::endl;
+        std::cout << "roots after 9999 iterations:\n" << r << "\n" << std::endl;
+
+    return 0;
+}