Add: morphological filters operate on the z dimension (replaces #521)

filters/CMakeLists.txt

@@ -37,6 +37,7 @@ if(build)
 	src/voxel_grid_occlusion_estimation.cpp
 	    src/normal_refinement.cpp
         src/grid_minimum.cpp
+        src/morphological_filter.cpp
         )
 
     set(incs
@@ -73,6 +74,7 @@ if(build)
         "include/pcl/${SUBSYS_NAME}/median_filter.h"
         "include/pcl/${SUBSYS_NAME}/normal_refinement.h"
         "include/pcl/${SUBSYS_NAME}/grid_minimum.h"
+        "include/pcl/${SUBSYS_NAME}/morphological_filter.h"
         )
 
     set(impl_incs
@@ -106,6 +108,7 @@ if(build)
         "include/pcl/${SUBSYS_NAME}/impl/median_filter.hpp"
         "include/pcl/${SUBSYS_NAME}/impl/normal_refinement.hpp"
         "include/pcl/${SUBSYS_NAME}/impl/grid_minimum.hpp"
+        "include/pcl/${SUBSYS_NAME}/impl/morphological_filter.hpp"
         )
 
     set(LIB_NAME "pcl_${SUBSYS_NAME}")

filters/include/pcl/filters/impl/morphological_filter.hpp

@@ -0,0 +1,208 @@
+/*
+ * Software License Agreement (BSD License)
+ *
+ *  Point Cloud Library (PCL) - www.pointclouds.org
+ *  Copyright (c) 2009-2012, Willow Garage, Inc.
+ *  Copyright (c) 2012-, Open Perception, Inc.
+ *  Copyright (c) 2014, RadiantBlue Technologies, Inc.
+ *
+ *  All rights reserved.
+ *
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions
+ *  are met:
+ *
+ *   * Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above
+ *     copyright notice, this list of conditions and the following
+ *     disclaimer in the documentation and/or other materials provided
+ *     with the distribution.
+ *   * Neither the name of the copyright holder(s) nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ *  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
+ *  COPYRIGHT OWNER 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, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ *  ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ *  POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $Id$
+ *
+ */
+
+#ifndef PCL_FILTERS_IMPL_MORPHOLOGICAL_FILTER_H_
+#define PCL_FILTERS_IMPL_MORPHOLOGICAL_FILTER_H_
+
+#include <limits>
+#include <vector>
+
+#include <Eigen/Core>
+
+#include <pcl/common/common.h>
+#include <pcl/common/io.h>
+#include <pcl/filters/morphological_filter.h>
+#include <pcl/octree/octree.h>
+
+///////////////////////////////////////////////////////////////////////////////////////////
+template <typename PointT> void
+pcl::applyMorphologicalOperator (const typename pcl::PointCloud<PointT>::ConstPtr &cloud_in,
+                                 float resolution, const int morphological_operator,
+                                 pcl::PointCloud<PointT> &cloud_out)
+{
+  if (cloud_in->empty ())
+    return;
+
+  pcl::copyPointCloud<PointT, PointT> (*cloud_in, cloud_out);
+
+  pcl::octree::OctreePointCloudSearch<PointT> tree (resolution);
+
+  tree.setInputCloud (cloud_in);
+  tree.addPointsFromInputCloud ();
+
+  float half_res = resolution / 2.0f;
+
+  switch (morphological_operator)
+  {
+    case MORPH_DILATE:
+    case MORPH_ERODE:
+    {
+      for (size_t p_idx = 0; p_idx < cloud_in->points.size (); ++p_idx)
+      {
+        Eigen::Vector3f bbox_min, bbox_max;
+        std::vector<int> pt_indices;
+        float minx = cloud_in->points[p_idx].x - half_res;
+        float miny = cloud_in->points[p_idx].y - half_res;
+        float minz = -std::numeric_limits<float>::max ();
+        float maxx = cloud_in->points[p_idx].x + half_res;
+        float maxy = cloud_in->points[p_idx].y + half_res;
+        float maxz = std::numeric_limits<float>::max ();
+        bbox_min = Eigen::Vector3f (minx, miny, minz);
+        bbox_max = Eigen::Vector3f (maxx, maxy, maxz);
+        tree.boxSearch (bbox_min, bbox_max, pt_indices);
+
+        if (pt_indices.size () > 0)
+        {
+          Eigen::Vector4f min_pt, max_pt;
+          pcl::getMinMax3D<PointT> (*cloud_in, pt_indices, min_pt, max_pt);
+
+          switch (morphological_operator)
+          {
+            case MORPH_DILATE:
+            {
+              cloud_out.points[p_idx].z = max_pt.z ();
+              break;
+            }
+            case MORPH_ERODE:
+            {
+              cloud_out.points[p_idx].z = min_pt.z ();
+              break;
+            }
+          }
+        }
+      }
+      break;
+    }
+    case MORPH_OPEN:
+    case MORPH_CLOSE:
+    {
+      pcl::PointCloud<PointT> cloud_temp;
+
+      pcl::copyPointCloud<PointT, PointT> (*cloud_in, cloud_temp);
+
+      for (size_t p_idx = 0; p_idx < cloud_temp.points.size (); ++p_idx)
+      {
+        Eigen::Vector3f bbox_min, bbox_max;
+        std::vector<int> pt_indices;
+        float minx = cloud_temp.points[p_idx].x - half_res;
+        float miny = cloud_temp.points[p_idx].y - half_res;
+        float minz = -std::numeric_limits<float>::max ();
+        float maxx = cloud_temp.points[p_idx].x + half_res;
+        float maxy = cloud_temp.points[p_idx].y + half_res;
+        float maxz = std::numeric_limits<float>::max ();
+        bbox_min = Eigen::Vector3f (minx, miny, minz);
+        bbox_max = Eigen::Vector3f (maxx, maxy, maxz);
+        tree.boxSearch (bbox_min, bbox_max, pt_indices);
+
+        if (pt_indices.size () > 0)
+        {
+          Eigen::Vector4f min_pt, max_pt;
+          pcl::getMinMax3D<PointT> (cloud_temp, pt_indices, min_pt, max_pt);
+
+          switch (morphological_operator)
+          {
+            case MORPH_OPEN:
+            {
+              cloud_out.points[p_idx].z = min_pt.z ();
+              break;
+            }
+            case MORPH_CLOSE:
+            {
+              cloud_out.points[p_idx].z = max_pt.z ();
+              break;
+            }
+          }
+        }
+      }
+
+      cloud_temp.swap (cloud_out);
+
+      for (size_t p_idx = 0; p_idx < cloud_temp.points.size (); ++p_idx)
+      {
+        Eigen::Vector3f bbox_min, bbox_max;
+        std::vector<int> pt_indices;
+        float minx = cloud_temp.points[p_idx].x - half_res;
+        float miny = cloud_temp.points[p_idx].y - half_res;
+        float minz = -std::numeric_limits<float>::max ();
+        float maxx = cloud_temp.points[p_idx].x + half_res;
+        float maxy = cloud_temp.points[p_idx].y + half_res;
+        float maxz = std::numeric_limits<float>::max ();
+        bbox_min = Eigen::Vector3f (minx, miny, minz);
+        bbox_max = Eigen::Vector3f (maxx, maxy, maxz);
+        tree.boxSearch (bbox_min, bbox_max, pt_indices);
+
+        if (pt_indices.size () > 0)
+        {
+          Eigen::Vector4f min_pt, max_pt;
+          pcl::getMinMax3D<PointT> (cloud_temp, pt_indices, min_pt, max_pt);
+
+          switch (morphological_operator)
+          {
+            case MORPH_OPEN:
+            default:
+            {
+              cloud_out.points[p_idx].z = max_pt.z ();
+              break;
+            }
+            case MORPH_CLOSE:
+            {
+              cloud_out.points[p_idx].z = min_pt.z ();
+              break;
+            }
+          }
+        }
+      }
+      break;
+    }
+    default:
+    {
+      PCL_ERROR ("Morphological operator is not supported!\n");
+      break;
+    }
+  }
+
+  return;
+}
+
+#define PCL_INSTANTIATE_applyMorphologicalOperator(T) template PCL_EXPORTS void pcl::applyMorphologicalOperator<T> (const pcl::PointCloud<T>::ConstPtr &, float, const int, pcl::PointCloud<T> &);
+
+#endif  //#ifndef PCL_FILTERS_IMPL_MORPHOLOGICAL_FILTER_H_
+

filters/include/pcl/filters/morphological_filter.h

@@ -0,0 +1,82 @@
+/*
+ * Software License Agreement (BSD License)
+ *
+ *  Point Cloud Library (PCL) - www.pointclouds.org
+ *  Copyright (c) 2009-2012, Willow Garage, Inc.
+ *  Copyright (c) 2012-, Open Perception, Inc.
+ *  Copyright (c) 2014, RadiantBlue Technologies, Inc.
+ *
+ *  All rights reserved.
+ *
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions
+ *  are met:
+ *
+ *   * Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above
+ *     copyright notice, this list of conditions and the following
+ *     disclaimer in the documentation and/or other materials provided
+ *     with the distribution.
+ *   * Neither the name of the copyright holder(s) nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ *  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
+ *  COPYRIGHT OWNER 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, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ *  ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ *  POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $Id$
+ *
+ */
+
+#ifndef PCL_FILTERS_MORPHOLOGICAL_FILTER_H_
+#define PCL_FILTERS_MORPHOLOGICAL_FILTER_H_
+
+#include <string>
+#include <pcl/pcl_base.h>
+#include <pcl/PointIndices.h>
+#include <pcl/conversions.h>
+#include <locale>
+
+namespace pcl
+{
+  enum MorphologicalOperators
+  {
+    MORPH_OPEN,
+    MORPH_CLOSE,
+    MORPH_DILATE,
+    MORPH_ERODE
+  };
+}
+
+namespace pcl
+{
+  /** \brief Apply morphological operator to the z dimension of the input point cloud
+    * \param[in] cloud_in the input point cloud dataset
+    * \param[in] resolution the window size to be used for the morphological operation
+    * \param[in] morphological_operator the morphological operator to apply (open, close, dilate, erode)
+    * \param[out] cloud_out the resultant output point cloud dataset
+    * \ingroup filters
+    */
+  template <typename PointT> PCL_EXPORTS void
+  applyMorphologicalOperator (const typename pcl::PointCloud<PointT>::ConstPtr &cloud_in,
+                              float resolution, const int morphological_operator,
+                              pcl::PointCloud<PointT> &cloud_out);
+}
+
+#ifdef PCL_NO_PRECOMPILE
+#include <pcl/filters/impl/morphological_filter.hpp>
+#endif
+
+#endif  //#ifndef PCL_FILTERS_MORPHOLOGICAL_FILTER_H_
+

filters/src/morphological_filter.cpp

@@ -0,0 +1,52 @@
+/*
+ * Software License Agreement (BSD License)
+ *
+ *  Point Cloud Library (PCL) - www.pointclouds.org
+ *  Copyright (c) 2009-2012, Willow Garage, Inc.
+ *  Copyright (c) 2012-, Open Perception, Inc.
+ *  Copyright (c) 2014, RadiantBlue Technologies, Inc.
+ *
+ *  All rights reserved.
+ *
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions
+ *  are met:
+ *
+ *   * Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above
+ *     copyright notice, this list of conditions and the following
+ *     disclaimer in the documentation and/or other materials provided
+ *     with the distribution.
+ *   * Neither the name of the copyright holder(s) nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ *  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
+ *  COPYRIGHT OWNER 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, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ *  ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ *  POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $Id$
+ *
+ */
+
+#include <pcl/filters/impl/morphological_filter.hpp>
+
+#ifndef PCL_NO_PRECOMPILE
+#include <pcl/impl/instantiate.hpp>
+#include <pcl/point_types.h>
+
+// Instantiations of specific point types
+PCL_INSTANTIATE(applyMorphologicalOperator, PCL_XYZ_POINT_TYPES)
+
+#endif // PCL_NO_PRECOMPILE
+

test/filters/CMakeLists.txt

@@ -18,5 +18,9 @@ PCL_ADD_TEST(filters_bilateral test_filters_bilateral
 PCL_ADD_TEST(filters_grid_minimum test_filters_grid_minimum
              FILES test_grid_minimum.cpp
              LINK_WITH pcl_gtest pcl_common pcl_filters)
+
+PCL_ADD_TEST(filters_morphological test_morphological
+             FILES test_morphological.cpp
+             LINK_WITH pcl_gtest pcl_common pcl_filters)