test_segmentation.cpp

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/*
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 *     with the distribution.
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 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
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 * $Id: test_segmentation.cpp 5066 2012-03-14 06:42:21Z rusu $
 *
 */

#include <gtest/gtest.h>
#include <pcl/kdtree/kdtree_flann.h>
#include <pcl/point_types.h>
#include <pcl/point_cloud.h>
#include <pcl/io/pcd_io.h>

#include <pcl/segmentation/extract_polygonal_prism_data.h>
#include <pcl/segmentation/segment_differences.h>

using namespace pcl;
using namespace pcl::io;

PointCloud<PointXYZ>::Ptr cloud_;
PointCloud<PointXYZ>::Ptr cloud_t_;
KdTree<PointXYZ>::Ptr tree_;

TEST (SegmentDifferences, Segmentation)
{
  SegmentDifferences<PointXYZ> sd;
  sd.setInputCloud (cloud_);
  sd.setDistanceThreshold (0.00005);

  // Set the target as itself
  sd.setTargetCloud (cloud_);

  PointCloud<PointXYZ> output;
  sd.segment (output);

  EXPECT_EQ (static_cast<int> (output.points.size ()), 0);
  
  // Set a different target
  sd.setTargetCloud (cloud_t_);
  sd.segment (output);
  EXPECT_EQ (static_cast<int> (output.points.size ()), 126);
  //savePCDFile ("./test/0-t.pcd", output);

  // Reverse
  sd.setInputCloud (cloud_t_);
  sd.setTargetCloud (cloud_);
  sd.segment (output);
  EXPECT_EQ (static_cast<int> (output.points.size ()), 127);
  //savePCDFile ("./test/t-0.pcd", output);
}

TEST (ExtractPolygonalPrism, Segmentation)
{
  PointCloud<PointXYZ>::Ptr hull (new PointCloud<PointXYZ>);
  hull->points.resize (5);

  for (size_t i = 0; i < hull->points.size (); ++i)
  {
    hull->points[i].x = hull->points[i].y = static_cast<float> (i);
    hull->points[i].z = 0.0f;
  }

  ExtractPolygonalPrismData<PointXYZ> ex;
  ex.setInputCloud (cloud_);
  ex.setInputPlanarHull (hull);

  PointIndices output;
  ex.segment (output);

  EXPECT_EQ (static_cast<int> (output.indices.size ()), 0);
}

/* ---[ */
int
  main (int argc, char** argv)
{
  if (argc < 2)
  {
    std::cerr << "No test file given. Please download `bun0.pcd` and pass its path to the test." << std::endl;
    return (-1);
  }

  // Load a standard PCD file from disk
  PointCloud<PointXYZ> cloud, cloud_t;
  if (loadPCDFile (argv[1], cloud) < 0)
  {
    std::cerr << "Failed to read test file. Please download `bun0.pcd` and pass its path to the test." << std::endl;
    return (-1);
  }

  // Tranpose the cloud
  cloud_t = cloud;
  for (size_t i = 0; i < cloud.points.size (); ++i)
    cloud_t.points[i].x += 0.01f;

  cloud_   = cloud.makeShared ();
  cloud_t_ = cloud_t.makeShared ();

  testing::InitGoogleTest (&argc, argv);
  return (RUN_ALL_TESTS ());
}
/* ]--- */