GPU interface for soft cascade

modules/gpu/include/opencv2/gpu/gpu.hpp

@@ -1532,6 +1532,49 @@ public:
     int detectMultiScale(const GpuMat& image, GpuMat& objectsBuf, Size maxObjectSize, Size minSize = Size(), double scaleFactor = 1.1, int minNeighbors = 4);
 };
 
+// ======================== GPU version for soft cascade ===================== //
+
+class CV_EXPORTS SoftCascade
+{
+public:
+    //! An empty cascade will be created.
+    SoftCascade();
+
+    //! Cascade will be created from file for scales from minScale to maxScale.
+    //! Param filename is a path to xml-serialized cascade.
+    //! Param minScale is a minimum scale relative to the original size of the image on which cascade will be applyed.
+    //! Param minScale is a maximum scale relative to the original size of the image on which cascade will be applyed.
+    SoftCascade( const string& filename, const float minScale = 0.4f, const float maxScale = 5.f);
+
+    //! cascade will be loaded from file "filename". The previous cascade will be destroyed.
+    //! Param filename is a path to xml-serialized cascade.
+    //! Param minScale is a minimum scale relative to the original size of the image on which cascade will be applyed.
+    //! Param minScale is a maximum scale relative to the original size of the image on which cascade will be applyed.
+    bool load( const string& filename, const float minScale = 0.4f, const float maxScale = 5.f);
+
+    virtual ~SoftCascade();
+
+    //! return vector of bounding boxes. Each box contains one detected object
+    virtual void detectMultiScale(const GpuMat& image, const GpuMat& rois, GpuMat& objects,
+    int rejectfactor = 1, Stream stream = Stream::Null()); // ToDo store objects in GPU mem
+
+protected:
+    enum { BOOST = 0 };
+    enum
+    {
+        FRAME_WIDTH        = 640,
+        FRAME_HEIGHT       = 480,
+        TOTAL_SCALES       = 55,
+        CLASSIFIERS        = 5,
+        ORIG_OBJECT_WIDTH  = 64,
+        ORIG_OBJECT_HEIGHT = 128
+    };
+
+private:
+    struct Filds;
+    Filds* filds;
+};
+
 ////////////////////////////////// SURF //////////////////////////////////////////
 
 class CV_EXPORTS SURF_GPU

modules/gpu/src/softcascade.cpp

+/*M///////////////////////////////////////////////////////////////////////////////////////
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+//  If you do not agree to this license, do not download, install,
+//  copy or use the software.
+//
+//
+//                           License Agreement
+//                For Open Source Computer Vision Library
+//
+// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
+// Copyright (C) 2008-2012, Willow Garage Inc., all rights reserved.
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+//
+//   * The name of the copyright holders may not be used to endorse or promote products
+//     derived from this software without specific prior written permission.
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+// This software is provided by the copyright holders and contributors "as is" and
+// any express or implied warranties, including, but not limited to, the implied
+// warranties of merchantability and fitness for a particular purpose are disclaimed.
+// In no event shall the Intel Corporation or contributors be liable for any direct,
+// indirect, incidental, special, exemplary, or consequential damages
+// (including, but not limited to, procurement of substitute goods or services;
+// loss of use, data, or profits; or business interruption) however caused
+// and on any theory of liability, whether in contract, strict liability,
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+// the use of this software, even if advised of the possibility of such damage.
+//
+//M*/
+
+#include <precomp.hpp>
+
+#if !defined (HAVE_CUDA)
+
+cv::gpu::SoftCascade::SoftCascade() : filds(0) { throw_nogpu(); }
+
+cv::gpu::SoftCascade::SoftCascade( const string&, const float, const float) : filds(0) { throw_nogpu(); }
+
+cv::gpu::SoftCascade::~SoftCascade() { throw_nogpu(); }
+
+bool cv::gpu::SoftCascade::load( const string&, const float, const float) { throw_nogpu(); }
+
+void cv::gpu::SoftCascade::detectMultiScale(const GpuMat&, const GpuMat&, GpuMat&, const int, Stream) { throw_nogpu(); }
+
+#else
+
+struct cv::gpu::SoftCascade::Filds
+{
+    bool fill(const FileNode &root, const float mins, const float maxs){return true;}
+    void calcLevels(int frameW, int frameH, int scales) {}
+};
+
+cv::gpu::SoftCascade::SoftCascade() : filds(0) {}
+
+cv::gpu::SoftCascade::SoftCascade( const string& filename, const float minScale, const float maxScale) : filds(0)
+{
+    load(filename, minScale, maxScale);
+}
+
+cv::gpu::SoftCascade::~SoftCascade()
+{
+    delete filds;
+}
+
+bool cv::gpu::SoftCascade::load( const string& filename, const float minScale, const float maxScale)
+{
+    if (filds)
+        delete filds;
+    filds = 0;
+
+    cv::FileStorage fs(filename, FileStorage::READ);
+    if (!fs.isOpened()) return false;
+
+    filds = new Filds;
+    Filds& flds = *filds;
+    if (!flds.fill(fs.getFirstTopLevelNode(), minScale, maxScale)) return false;
+    flds.calcLevels(FRAME_WIDTH, FRAME_HEIGHT, TOTAL_SCALES);
+
+    return true;
+}
+
+void cv::gpu::SoftCascade::detectMultiScale(const GpuMat& /*image*/, const GpuMat& /*rois*/,
+                                GpuMat& /*objects*/, const int /*rejectfactor*/, Stream /*stream*/)
+{
+    // empty
+}
+
+#endif