edge preserve filters added and windows warning removed

update1

modules/photo/src/npr.cpp

+#include "precomp.hpp"
+#include "opencv2/photo.hpp"
+#include "opencv2/highgui.hpp"
+#include "opencv2/core.hpp"
+#include "opencv2/imgproc.hpp"
+#include <iostream>
+#include <stdlib.h>
+
+#include "npr.hpp"
+
+using namespace std;
+using namespace cv;
+
+void cv::edgepreservefilter(InputArray _src, OutputArray _dst, int flags, float sigma_s, float sigma_r)
+{
+	Mat I = _src.getMat();
+	_dst.create(I.size(), CV_8UC3);
+	Mat dst = _dst.getMat();
+
+	int h = I.size().height;
+	int w = I.size().width;
+
+	Mat res = Mat(h,w,CV_32FC3);
+	dst.convertTo(res,CV_32FC3,1.0/255.0);
+
+	Domain_Filter obj;
+
+	Mat img = Mat(I.size(),CV_32FC3);
+	I.convertTo(img,CV_32FC3,1.0/255.0);
+
+	obj.filter(img, res, sigma_s, sigma_r, flags);
+
+	convertScaleAbs(res, dst, 255,0);
+}