refactor preprocessing

modules/gpu/src/softcascade.cpp

@@ -183,13 +183,47 @@ struct cv::gpu::SoftCascade::Filds
     {
         cudaMemset(plane.data, 0, plane.step * plane.rows);
 
-        int fw = Filds::FRAME_WIDTH;
-        int fh = Filds::FRAME_HEIGHT;
+        static const int fw = Filds::FRAME_WIDTH;
+        static const int fh = Filds::FRAME_HEIGHT;
 
         GpuMat gray(plane, cv::Rect(0, fh * Filds::HOG_LUV_BINS, fw, fh));
         cv::gpu::cvtColor(colored, gray, CV_BGR2GRAY);
+        createHogBins(gray);
+
+        createLuvBins(colored);
+
+        integrate();
+    }
+
+private:
+    void calcLevels(const std::vector<device::icf::Octave>& octs,
+                                                    int frameW, int frameH, int nscales);
+
+    typedef std::vector<device::icf::Octave>::const_iterator  octIt_t;
+    int fitOctave(const std::vector<device::icf::Octave>& octs, const float& logFactor) const
+    {
+        float minAbsLog = FLT_MAX;
+        int res =  0;
+        for (int oct = 0; oct < (int)octs.size(); ++oct)
+        {
+            const device::icf::Octave& octave =octs[oct];
+            float logOctave = ::log(octave.scale);
+            float logAbsScale = ::fabs(logFactor - logOctave);
+
+            if(logAbsScale < minAbsLog)
+            {
+                res = oct;
+                minAbsLog = logAbsScale;
+            }
+        }
+        return res;
+    }
+
+    void createHogBins(const cv::gpu::GpuMat& gray)
+    {
+        static const int fw = Filds::FRAME_WIDTH;
+        static const int fh = Filds::FRAME_HEIGHT;
 
-        //create hog
         GpuMat dfdx(fplane, cv::Rect(0,  0, fw, fh));
         GpuMat dfdy(fplane, cv::Rect(0, fh, fw, fh));
 
@@ -213,7 +247,14 @@ struct cv::gpu::SoftCascade::Filds
         GpuMat cmag(plane, cv::Rect(0, fh * Filds::HOG_BINS, fw, fh));
         nmag.convertTo(cmag, CV_8UC1);
 
-        // create luv
+        device::icf::fillBins(plane, nang, fw, fh, Filds::HOG_BINS);
+    }
+
+    void createLuvBins(const cv::gpu::GpuMat& colored)
+    {
+        static const int fw = Filds::FRAME_WIDTH;
+        static const int fh = Filds::FRAME_HEIGHT;
+
         cv::gpu::cvtColor(colored, luv, CV_BGR2Luv);
 
         std::vector<GpuMat> splited;
@@ -223,8 +264,12 @@ struct cv::gpu::SoftCascade::Filds
         }
 
         cv::gpu::split(luv, splited);
+    }
 
-        device::icf::fillBins(plane, nang, fw, fh, Filds::HOG_BINS);
+    void integrate()
+    {
+        int fw = Filds::FRAME_WIDTH;
+        int fh = Filds::FRAME_HEIGHT;
 
         GpuMat channels(plane, cv::Rect(0, 0, fw, fh * Filds::HOG_LUV_BINS));
         cv::gpu::resize(channels, shrunk, cv::Size(), 0.25, 0.25, CV_INTER_AREA);
@@ -239,30 +284,6 @@ struct cv::gpu::SoftCascade::Filds
             cv::gpu::integralBuffered(channel, sum, integralBuffer);
         }
     }
-
-private:
-    void calcLevels(const std::vector<device::icf::Octave>& octs,
-                                                    int frameW, int frameH, int nscales);
-
-    typedef std::vector<device::icf::Octave>::const_iterator  octIt_t;
-    int fitOctave(const std::vector<device::icf::Octave>& octs, const float& logFactor) const
-    {
-        float minAbsLog = FLT_MAX;
-        int res =  0;
-        for (int oct = 0; oct < (int)octs.size(); ++oct)
-        {
-            const device::icf::Octave& octave =octs[oct];
-            float logOctave = ::log(octave.scale);
-            float logAbsScale = ::fabs(logFactor - logOctave);
-
-            if(logAbsScale < minAbsLog)
-            {
-                res = oct;
-                minAbsLog = logAbsScale;
-            }
-        }
-        return res;
-    }
 };
 
 bool cv::gpu::SoftCascade::Filds::fill(const FileNode &root, const float mins, const float maxs)
@@ -572,5 +593,4 @@ cv::Size cv::gpu::SoftCascade::getRoiSize() const
     return cv::Size(Filds::FRAME_WIDTH / 4, Filds::FRAME_HEIGHT / 4);
 }
 
-
 #endif
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