minor changes

modules/photo/include/opencv2/photo.hpp

@@ -99,7 +99,7 @@ CV_EXPORTS_W void makeHDR(InputArrayOfArrays srcImgs, const std::vector<float>&
 CV_EXPORTS_W void tonemap(InputArray src, OutputArray dst, int algorithm,
 	                      const std::vector<float>& params = std::vector<float>());
 
-CV_EXPORTS_W void exposureFusion(InputArrayOfArrays srcImgs, OutputArray dst, bool align = false, float wc = 1, float ws = 1, float we = 0);
+CV_EXPORTS_W void exposureFusion(InputArrayOfArrays srcImgs, OutputArray dst, bool align = false, float wc = 1.0f, float ws = 1.0f, float we = 0.0f);
 
 CV_EXPORTS_W void shiftMat(InputArray src, Point shift, OutputArray dst);
 

modules/photo/src/hdr_fusion.cpp

@@ -58,13 +58,13 @@ static void triangleWeights(float weights[])
 
 static void generateResponce(float responce[])
 {
-    for(int i = 0; i < 256; i++) {
-        responce[i] = log((float)i);
+    for(int i = 1; i < 256; i++) {
+        responce[i] = logf((float)i);
     }
     responce[0] = responce[1];
 }
 
-static void checkImages(std::vector<Mat>& images, bool hdr, const std::vector<float>& _exp_times = std::vector<float>())
+static void checkImages(const std::vector<Mat>& images, bool hdr, const std::vector<float>& _exp_times = std::vector<float>())
 {
 	if(images.empty()) {
 		CV_Error(Error::StsBadArg, "Need at least one image");
@@ -85,7 +85,7 @@ static void checkImages(std::vector<Mat>& images, bool hdr, const std::vector<fl
 	}
 }
 
-static void alignImages(std::vector<Mat>& src, std::vector<Mat>& dst)
+static void alignImages(const std::vector<Mat>& src, std::vector<Mat>& dst)
 {
 	dst.resize(src.size());
 
@@ -120,7 +120,7 @@ void makeHDR(InputArrayOfArrays _images, const std::vector<float>& _exp_times, O
 	}
 	std::vector<float> exp_times(_exp_times.size());
 	for(size_t i = 0; i < exp_times.size(); i++) {
-		exp_times[i] = log(_exp_times[i]);
+        exp_times[i] = logf(_exp_times[i]);
 	}
 
 	float weights[256], responce[256];
@@ -144,7 +144,7 @@ void makeHDR(InputArrayOfArrays _images, const std::vector<float>& _exp_times, O
 			}
 		}
 		for(int channel = 0; channel < 3; channel++) {
-			res_ptr[channel] = exp(sum[channel] / weight_sum);
+            res_ptr[channel] = expf(sum[channel] / weight_sum);
 			if(res_ptr[channel] > max) {
 				max = res_ptr[channel];
 			}
@@ -184,7 +184,7 @@ void exposureFusion(InputArrayOfArrays _images, OutputArray _dst, bool align, fl
 			pow(deviation, 2.0, deviation);
 			saturation += deviation;
 		}
-		sqrt(saturation, saturation);
+        sqrt(saturation, saturation);
 
 		wellexp = Mat::ones(gray.size(), CV_32FC1);
 		for(int i = 0; i < 3; i++) {
@@ -203,7 +203,7 @@ void exposureFusion(InputArrayOfArrays _images, OutputArray _dst, bool align, fl
 		weights[im] = weights[im].mul(wellexp);
 		weight_sum += weights[im];
 	}
-	int maxlevel = (int)(log((double)max(images[0].rows, images[0].cols)) / log(2.0)) - 1;
+    int maxlevel = static_cast<int>(logf(static_cast<float>(max(images[0].rows, images[0].cols))) / logf(2.0)) - 1;
 	std::vector<Mat> res_pyr(maxlevel + 1);
 
 	for(size_t im = 0; im < images.size(); im++) {
@@ -242,4 +242,4 @@ void exposureFusion(InputArrayOfArrays _images, OutputArray _dst, bool align, fl
 	res_pyr[0].copyTo(result);
 }
 
-};
+};
\ No newline at end of file

modules/photo/src/tonemap.cpp

@@ -40,6 +40,7 @@
 //
 //M*/
 
+#include "precomp.hpp"
 #include "opencv2/photo.hpp"
 #include "opencv2/imgproc.hpp"
 
@@ -52,8 +53,7 @@ static float getParam(const std::vector<float>& params, size_t i, float defval)
         return params[i];
     } else {
         return defval;
-    }
-        
+    }       
 }
 
 static void DragoMap(Mat& src_img, Mat &dst_img, const std::vector<float>& params)
@@ -63,7 +63,7 @@ static void DragoMap(Mat& src_img, Mat &dst_img, const std::vector<float>& param
     cvtColor(src_img, gray_img, COLOR_RGB2GRAY);
     Mat log_img;
     log(gray_img, log_img);
-    float mean = exp((float)sum(log_img)[0] / log_img.total());
+    float mean = expf(static_cast<float>(sum(log_img)[0]) / log_img.total());
     gray_img /= mean;
     log_img.release();