CameraROS.cpp

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/*
Copyright (c) 2011-2014, Mathieu Labbe - IntRoLab - Universite de Sherbrooke
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 Universite de Sherbrooke 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
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*/

#include "CameraROS.h"
#include "find_object/Settings.h"

#include <opencv2/imgproc/imgproc.hpp>
#include <sensor_msgs/image_encodings.h>

using namespace find_object;

CameraROS::CameraROS(bool subscribeDepth, QObject * parent) :
        Camera(parent),
        subscribeDepth_(subscribeDepth)
{
        ros::NodeHandle nh; // public
        ros::NodeHandle pnh("~"); // private

        qRegisterMetaType<ros::Time>("ros::Time");
        qRegisterMetaType<cv::Mat>("cv::Mat");

        if(!subscribeDepth_)
        {
                image_transport::ImageTransport it(nh);
                imageSub_ = it.subscribe(nh.resolveName("image"), 1, &CameraROS::imgReceivedCallback, this);
        }
        else
        {
                int queueSize = 10;
                pnh.param("queue_size", queueSize, queueSize);
                ROS_INFO("find_object_ros: queue_size = %d", queueSize);

                ros::NodeHandle rgb_nh(nh, "rgb");
                ros::NodeHandle rgb_pnh(pnh, "rgb");
                ros::NodeHandle depth_nh(nh, "depth_registered");
                ros::NodeHandle depth_pnh(pnh, "depth_registered");
                image_transport::ImageTransport rgb_it(rgb_nh);
                image_transport::ImageTransport depth_it(depth_nh);
                image_transport::TransportHints hintsRgb("raw", ros::TransportHints(), rgb_pnh);
                image_transport::TransportHints hintsDepth("raw", ros::TransportHints(), depth_pnh);

                rgbSub_.subscribe(rgb_it, rgb_nh.resolveName("image_rect_color"), 1, hintsRgb);
                depthSub_.subscribe(depth_it, depth_nh.resolveName("image_raw"), 1, hintsDepth);
                cameraInfoSub_.subscribe(depth_nh, "camera_info", 1);
                sync_ = new message_filters::Synchronizer<MySyncPolicy>(MySyncPolicy(queueSize), rgbSub_, depthSub_, cameraInfoSub_);
                sync_->registerCallback(boost::bind(&CameraROS::imgDepthReceivedCallback, this, _1, _2, _3));

        }
}

QStringList CameraROS::subscribedTopics() const
{
        QStringList topics;
        if(subscribeDepth_)
        {
                topics.append(rgbSub_.getTopic().c_str());
                topics.append(depthSub_.getTopic().c_str());
                topics.append(cameraInfoSub_.getTopic().c_str());
        }
        else
        {
                topics.append(imageSub_.getTopic().c_str());
        }
        return topics;
}

bool CameraROS::start()
{
        this->startTimer();
        return true;
}

void CameraROS::stop()
{
        this->stopTimer();
}

void CameraROS::takeImage()
{
        ros::spinOnce();
}

void CameraROS::imgReceivedCallback(const sensor_msgs::ImageConstPtr & msg)
{
        if(msg->data.size())
        {
                cv_bridge::CvImageConstPtr ptr = cv_bridge::toCvShare(msg);
                if(msg->encoding.compare(sensor_msgs::image_encodings::BGR8) == 0)
                {
                        cv::Mat cpy = ptr->image.clone();
                        Q_EMIT rosDataReceived(msg->header.frame_id, msg->header.stamp, cv::Mat(), 0.0f);
                        Q_EMIT imageReceived(cpy);
                }
                else if(msg->encoding.compare(sensor_msgs::image_encodings::RGB8) == 0)
                {
                        cv::Mat bgr;
                        cv::cvtColor(ptr->image, bgr, cv::COLOR_RGB2BGR);
                        Q_EMIT rosDataReceived(msg->header.frame_id, msg->header.stamp, cv::Mat(), 0.0f);
                        Q_EMIT imageReceived(bgr);
                }
                else
                {
                        ROS_ERROR("find_object_ros: Encoding \"%s\" detected. Supported image encodings are bgr8 and rgb8...", msg->encoding.c_str());
                }
        }
}

void CameraROS::imgDepthReceivedCallback(
                const sensor_msgs::ImageConstPtr& rgbMsg,
                const sensor_msgs::ImageConstPtr& depthMsg,
                const sensor_msgs::CameraInfoConstPtr& cameraInfoMsg)
{
        if(!(rgbMsg->encoding.compare(sensor_msgs::image_encodings::MONO8) ==0 ||
                 rgbMsg->encoding.compare(sensor_msgs::image_encodings::BGR8) == 0 ||
                 rgbMsg->encoding.compare(sensor_msgs::image_encodings::RGB8) == 0) &&
                (depthMsg->encoding.compare(sensor_msgs::image_encodings::TYPE_16UC1)!=0 ||
                 depthMsg->encoding.compare(sensor_msgs::image_encodings::TYPE_32FC1)!=0))
        {
                        ROS_ERROR("find_object_ros: Input type must be rgb=mono8,rgb8,bgr8 and depth=32FC1,16UC1");
                        return;
        }

        if(rgbMsg->data.size())
        {
                cv_bridge::CvImageConstPtr ptr = cv_bridge::toCvShare(rgbMsg);
                cv_bridge::CvImageConstPtr ptrDepth = cv_bridge::toCvShare(depthMsg);
                float depthConstant = 1.0f/cameraInfoMsg->K[4];
                if(rgbMsg->encoding.compare(sensor_msgs::image_encodings::BGR8) == 0)
                {
                        cv::Mat cpy = ptr->image.clone();
                        Q_EMIT rosDataReceived(rgbMsg->header.frame_id, rgbMsg->header.stamp, ptrDepth->image, depthConstant);
                        Q_EMIT imageReceived(cpy);
                }
                else if(rgbMsg->encoding.compare(sensor_msgs::image_encodings::RGB8) == 0)
                {
                        cv::Mat bgr;
                        cv::cvtColor(ptr->image, bgr, cv::COLOR_RGB2BGR);
                        Q_EMIT rosDataReceived(rgbMsg->header.frame_id, rgbMsg->header.stamp, ptrDepth->image, depthConstant);
                        Q_EMIT imageReceived(bgr);
                }
        }


}