C++ Ptr::getShadowValue方法代码示例

template <typename PointT> typename pcl::PointCloud<PointT>::Ptr
pcl::io::OpenNI2Grabber::convertToXYZRGBPointCloud (const Image::Ptr &image, const DepthImage::Ptr &depth_image)
{
  boost::shared_ptr<pcl::PointCloud<PointT> > cloud (new pcl::PointCloud<PointT>);

  cloud->header.seq = depth_image->getFrameID ();
  cloud->header.stamp = depth_image->getTimestamp ();
  cloud->header.frame_id = rgb_frame_id_;
  cloud->height = std::max (image_height_, depth_height_);
  cloud->width = std::max (image_width_, depth_width_);
  cloud->is_dense = false;

  cloud->points.resize (cloud->height * cloud->width);

  // Generate default camera parameters
  float fx = device_->getDepthFocalLength (); // Horizontal focal length
  float fy = device_->getDepthFocalLength (); // Vertcal focal length
  float cx = ((float)depth_width_ - 1.f) / 2.f;  // Center x
  float cy = ((float)depth_height_- 1.f) / 2.f; // Center y

  // Load pre-calibrated camera parameters if they exist
  if (pcl_isfinite (depth_parameters_.focal_length_x))
    fx =  static_cast<float> (depth_parameters_.focal_length_x);

  if (pcl_isfinite (depth_parameters_.focal_length_y))
    fy =  static_cast<float> (depth_parameters_.focal_length_y);

  if (pcl_isfinite (depth_parameters_.principal_point_x))
    cx =  static_cast<float> (depth_parameters_.principal_point_x);

  if (pcl_isfinite (depth_parameters_.principal_point_y))
    cy =  static_cast<float> (depth_parameters_.principal_point_y);

  // Get inverse focal length for calculations below
  float fx_inv = 1.0f / fx;
  float fy_inv = 1.0f / fy;

  const uint16_t* depth_map = (const uint16_t*) depth_image->getData ();
  if (depth_image->getWidth () != depth_width_ || depth_image->getHeight () != depth_height_)
  {
    // Resize the image if nessacery
    depth_resize_buffer_.resize(depth_width_ * depth_height_);
    depth_map = depth_resize_buffer_.data();
    depth_image->fillDepthImageRaw (depth_width_, depth_height_, (unsigned short*) depth_map );
  }

  const uint8_t* rgb_buffer = (const uint8_t*) image->getData ();
  if (image->getWidth () != image_width_ || image->getHeight () != image_height_)
  {
    // Resize the image if nessacery
    color_resize_buffer_.resize(image_width_ * image_height_ * 3);
    rgb_buffer = color_resize_buffer_.data();
    image->fillRGB (image_width_, image_height_, (unsigned char*) rgb_buffer, image_width_ * 3);
  }


  float bad_point = std::numeric_limits<float>::quiet_NaN ();

  // set xyz to Nan and rgb to 0 (black)  
  if (image_width_ != depth_width_)
  {
    PointT pt;
    pt.x = pt.y = pt.z = bad_point;
    pt.b = pt.g = pt.r = 0;
    pt.a = 255; // point has no color info -> alpha = max => transparent 
    cloud->points.assign (cloud->points.size (), pt);
  }

  // fill in XYZ values
  unsigned step = cloud->width / depth_width_;
  unsigned skip = cloud->width - (depth_width_ * step);

  int value_idx = 0;
  int point_idx = 0;
  for (int v = 0; v < depth_height_; ++v, point_idx += skip)
  {
    for (int u = 0; u < depth_width_; ++u, ++value_idx, point_idx += step)
    {
      PointT& pt = cloud->points[point_idx];
      /// @todo Different values for these cases
      // Check for invalid measurements

      OniDepthPixel pixel = depth_map[value_idx];
      if (pixel != 0 &&
        pixel != depth_image->getNoSampleValue () &&
        pixel != depth_image->getShadowValue () )
      {
        pt.z = depth_map[value_idx] * 0.001f;  // millimeters to meters
        pt.x = (static_cast<float> (u) - cx) * pt.z * fx_inv;
        pt.y = (static_cast<float> (v) - cy) * pt.z * fy_inv;
      }
      else
      {
        pt.x = pt.y = pt.z = bad_point;
      }
    }
  }

  // fill in the RGB values
  step = cloud->width / image_width_;
//.........这里部分代码省略.........