mask_image_to_rect.cpp

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// -*- mode: c++ -*-
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#include "jsk_perception/mask_image_to_rect.h"
#include <boost/assign.hpp>
#include <jsk_topic_tools/log_utils.h>
#include <opencv2/opencv.hpp>
#include <sensor_msgs/image_encodings.h>
#include <cv_bridge/cv_bridge.h>

namespace jsk_perception
{
  void MaskImageToRect::onInit()
  {
    DiagnosticNodelet::onInit();
    pub_ = advertise<jsk_recognition_msgs::RectArray>(*pnh_, "output", 1);
    onInitPostProcess();
  }

  void MaskImageToRect::subscribe()
  {
    sub_mask_ = pnh_->subscribe("input", 1, &MaskImageToRect::convert, this);
    ros::V_string names = boost::assign::list_of("~input");
    jsk_topic_tools::warnNoRemap(names);
  }

  void MaskImageToRect::unsubscribe()
  {
    sub_mask_.shutdown();
  }

  void MaskImageToRect::convert(
    const sensor_msgs::Image::ConstPtr& mask_msg)
  {
    vital_checker_->poke();
    std::vector<cv::Point> indices;
    cv_bridge::CvImagePtr cv_ptr = cv_bridge::toCvCopy(
      mask_msg, sensor_msgs::image_encodings::MONO8);
    cv::Mat mask = cv_ptr->image;
    for (size_t j = 0; j < mask.rows; j++) {
      for (size_t i = 0; i < mask.cols; i++) {
        if (mask.at<uchar>(j, i) == 255) {
          indices.push_back(cv::Point(i, j));
        }
      }
    }
    jsk_recognition_msgs::RectArray rects;
    rects.header = mask_msg->header;
    if (indices.size() > 0){
      cv::Rect mask_rect = cv::boundingRect(indices);
      jsk_recognition_msgs::Rect rect;
      rect.x = mask_rect.x;
      rect.y = mask_rect.y;
      rect.width = mask_rect.width;
      rect.height = mask_rect.height;
      rects.rects.push_back(rect);
    }
    pub_.publish(rects);
  }
}

#include <pluginlib/class_list_macros.h>
PLUGINLIB_EXPORT_CLASS (jsk_perception::MaskImageToRect, nodelet::Nodelet);