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YoloObjectDetector.cpp
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YoloObjectDetector.cpp
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/*
* YoloObjectDetector.cpp
*
* Created on: Dec 19, 2016
* Author: Marko Bjelonic
* Institute: ETH Zurich, Robotic Systems Lab
*/
// yolo object detector
#include "darknet_ros/YoloObjectDetector.hpp"
// Check for xServer
#include <X11/Xlib.h>
#ifdef DARKNET_FILE_PATH
std::string darknetFilePath_ = DARKNET_FILE_PATH;
#else
#error Path of darknet repository is not defined in CMakeLists.txt.
#endif
namespace darknet_ros {
char *cfg;
char *weights;
char *data;
char **detectionNames;
YoloObjectDetector::YoloObjectDetector(ros::NodeHandle nh)
: nodeHandle_(nh),
imageTransport_(nodeHandle_),
numClasses_(0),
classLabels_(0),
rosBoxes_(0),
rosBoxCounter_(0)
{
ROS_INFO("[YoloObjectDetector] Node started.");
// Read parameters from config file.
if (!readParameters()) {
ros::requestShutdown();
}
init();
}
YoloObjectDetector::~YoloObjectDetector()
{
{
boost::unique_lock<boost::shared_mutex> lockNodeStatus(mutexNodeStatus_);
isNodeRunning_ = false;
}
yoloThread_.join();
}
bool YoloObjectDetector::readParameters()
{
// Load common parameters.
nodeHandle_.param("image_view/enable_opencv", viewImage_, true);
nodeHandle_.param("image_view/wait_key_delay", waitKeyDelay_, 3);
nodeHandle_.param("image_view/enable_console_output", enableConsoleOutput_, false);
// Check if Xserver is running on Linux.
if (XOpenDisplay(NULL)) {
// Do nothing!
ROS_INFO("[YoloObjectDetector] Xserver is running.");
} else {
ROS_INFO("[YoloObjectDetector] Xserver is not running.");
viewImage_ = false;
}
// Set vector sizes.
nodeHandle_.param("yolo_model/detection_classes/names", classLabels_,
std::vector<std::string>(0));
numClasses_ = classLabels_.size();
rosBoxes_ = std::vector<std::vector<RosBox_> >(numClasses_);
rosBoxCounter_ = std::vector<int>(numClasses_);
return true;
}
void YoloObjectDetector::init()
{
ROS_INFO("[YoloObjectDetector] init().");
// Initialize deep network of darknet.
std::string weightsPath;
std::string configPath;
std::string dataPath;
std::string configModel;
std::string weightsModel;
// Threshold of object detection.
float thresh;
nodeHandle_.param("yolo_model/threshold/value", thresh, (float) 0.3);
// Path to weights file.
nodeHandle_.param("yolo_model/weight_file/name", weightsModel,
std::string("tiny-yolo-voc.weights"));
nodeHandle_.param("weights_path", weightsPath, std::string("/default"));
weightsPath += "/" + weightsModel;
weights = new char[weightsPath.length() + 1];
strcpy(weights, weightsPath.c_str());
// Path to config file.
nodeHandle_.param("yolo_model/config_file/name", configModel, std::string("tiny-yolo-voc.cfg"));
nodeHandle_.param("config_path", configPath, std::string("/default"));
configPath += "/" + configModel;
cfg = new char[configPath.length() + 1];
strcpy(cfg, configPath.c_str());
// Path to data folder.
dataPath = darknetFilePath_;
dataPath += "/data";
data = new char[dataPath.length() + 1];
strcpy(data, dataPath.c_str());
// Get classes.
detectionNames = (char**) realloc((void*) detectionNames, (numClasses_ + 1) * sizeof(char*));
for (int i = 0; i < numClasses_; i++) {
detectionNames[i] = new char[classLabels_[i].length() + 1];
strcpy(detectionNames[i], classLabels_[i].c_str());
}
// Load network.
setupNetwork(cfg, weights, data, thresh, detectionNames, numClasses_,
0, 0, 1, 0.5, 0, 0, 0, 0);
yoloThread_ = std::thread(&YoloObjectDetector::yolo, this);
// Initialize publisher and subscriber.
std::string cameraTopicName;
int cameraQueueSize;
std::string objectDetectorTopicName;
int objectDetectorQueueSize;
bool objectDetectorLatch;
std::string boundingBoxesTopicName;
int boundingBoxesQueueSize;
bool boundingBoxesLatch;
std::string detectionImageTopicName;
int detectionImageQueueSize;
bool detectionImageLatch;
nodeHandle_.param("subscribers/camera_reading/topic", cameraTopicName,
std::string("/camera/image_raw"));
nodeHandle_.param("subscribers/camera_reading/queue_size", cameraQueueSize, 1);
nodeHandle_.param("publishers/object_detector/topic", objectDetectorTopicName,
std::string("found_object"));
nodeHandle_.param("publishers/object_detector/queue_size", objectDetectorQueueSize, 1);
nodeHandle_.param("publishers/object_detector/latch", objectDetectorLatch, false);
nodeHandle_.param("publishers/bounding_boxes/topic", boundingBoxesTopicName,
std::string("bounding_boxes"));
nodeHandle_.param("publishers/bounding_boxes/queue_size", boundingBoxesQueueSize, 1);
nodeHandle_.param("publishers/bounding_boxes/latch", boundingBoxesLatch, false);
nodeHandle_.param("publishers/detection_image/topic", detectionImageTopicName,
std::string("detection_image"));
nodeHandle_.param("publishers/detection_image/queue_size", detectionImageQueueSize, 1);
nodeHandle_.param("publishers/detection_image/latch", detectionImageLatch, true);
imageSubscriber_ = imageTransport_.subscribe(cameraTopicName, cameraQueueSize,
&YoloObjectDetector::cameraCallback, this);
objectPublisher_ = nodeHandle_.advertise<std_msgs::Int8>(objectDetectorTopicName,
objectDetectorQueueSize,
objectDetectorLatch);
boundingBoxesPublisher_ = nodeHandle_.advertise<darknet_ros_msgs::BoundingBoxes>(
boundingBoxesTopicName, boundingBoxesQueueSize, boundingBoxesLatch);
detectionImagePublisher_ = nodeHandle_.advertise<sensor_msgs::Image>(detectionImageTopicName,
detectionImageQueueSize,
detectionImageLatch);
// Action servers.
std::string checkForObjectsActionName;
nodeHandle_.param("actions/camera_reading/topic", checkForObjectsActionName,
std::string("check_for_objects"));
checkForObjectsActionServer_.reset(
new CheckForObjectsActionServer(nodeHandle_, checkForObjectsActionName, false));
checkForObjectsActionServer_->registerGoalCallback(
boost::bind(&YoloObjectDetector::checkForObjectsActionGoalCB, this));
checkForObjectsActionServer_->registerPreemptCallback(
boost::bind(&YoloObjectDetector::checkForObjectsActionPreemptCB, this));
checkForObjectsActionServer_->start();
}
void YoloObjectDetector::cameraCallback(const sensor_msgs::ImageConstPtr& msg)
{
ROS_DEBUG("[YoloObjectDetector] USB image received.");
cv_bridge::CvImagePtr cam_image;
try {
cam_image = cv_bridge::toCvCopy(msg, sensor_msgs::image_encodings::BGR8);
} catch (cv_bridge::Exception& e) {
ROS_ERROR("cv_bridge exception: %s", e.what());
return;
}
if (cam_image) {
{
boost::unique_lock<boost::shared_mutex> lockImageCallback(mutexImageCallback_);
camImageCopy_ = cam_image->image.clone();
}
{
boost::unique_lock<boost::shared_mutex> lockImageStatus(mutexImageStatus_);
imageStatus_ = true;
}
frameWidth_ = cam_image->image.size().width;
frameHeight_ = cam_image->image.size().height;
}
return;
}
void YoloObjectDetector::checkForObjectsActionGoalCB()
{
ROS_DEBUG("[YoloObjectDetector] Start check for objects action.");
boost::shared_ptr<const darknet_ros_msgs::CheckForObjectsGoal> imageActionPtr =
checkForObjectsActionServer_->acceptNewGoal();
sensor_msgs::Image imageAction = imageActionPtr->image;
cv_bridge::CvImagePtr cam_image;
try {
cam_image = cv_bridge::toCvCopy(imageAction, sensor_msgs::image_encodings::BGR8);
} catch (cv_bridge::Exception& e) {
ROS_ERROR("cv_bridge exception: %s", e.what());
return;
}
if (cam_image) {
{
boost::unique_lock<boost::shared_mutex> lockImageCallback(mutexImageCallback_);
camImageCopy_ = cam_image->image.clone();
}
{
boost::unique_lock<boost::shared_mutex> lockImageCallback(mutexActionStatus_);
actionId_ = imageActionPtr->id;
}
{
boost::unique_lock<boost::shared_mutex> lockImageStatus(mutexImageStatus_);
imageStatus_ = true;
}
frameWidth_ = cam_image->image.size().width;
frameHeight_ = cam_image->image.size().height;
}
return;
}
void YoloObjectDetector::checkForObjectsActionPreemptCB()
{
ROS_DEBUG("[YoloObjectDetector] Preempt check for objects action.");
checkForObjectsActionServer_->setPreempted();
}
bool YoloObjectDetector::isCheckingForObjects() const
{
return (ros::ok() && checkForObjectsActionServer_->isActive()
&& !checkForObjectsActionServer_->isPreemptRequested());
}
bool YoloObjectDetector::publishDetectionImage(const cv::Mat& detectionImage)
{
if (detectionImagePublisher_.getNumSubscribers() < 1)
return false;
cv_bridge::CvImage cvImage;
cvImage.header.stamp = ros::Time::now();
cvImage.header.frame_id = "detection_image";
cvImage.encoding = sensor_msgs::image_encodings::BGR8;
cvImage.image = detectionImage;
detectionImagePublisher_.publish(*cvImage.toImageMsg());
ROS_DEBUG("Detection image has been published.");
return true;
}
double YoloObjectDetector::getWallTime()
{
struct timeval time;
if (gettimeofday(&time, NULL)) {
return 0;
}
return (double) time.tv_sec + (double) time.tv_usec * .000001;
}
void *YoloObjectDetector::fetchInThread()
{
IplImage* ROS_img = getIplImage();
ipl_into_image(ROS_img, buff_[buffIndex_]);
{
boost::shared_lock<boost::shared_mutex> lock(mutexImageCallback_);
buffId_[buffIndex_] = actionId_;
}
rgbgr_image(buff_[buffIndex_]);
letterbox_image_into(buff_[buffIndex_], net_.w, net_.h, buffLetter_[buffIndex_]);
return 0;
}
void *YoloObjectDetector::detectInThread()
{
running_ = 1;
float nms = .4;
layer l = net_.layers[net_.n - 1];
float *X = buffLetter_[(buffIndex_ + 2) % 3].data;
float *prediction = network_predict(net_, X);
memcpy(predictions_[demoIndex_], prediction, l.outputs * sizeof(float));
mean_arrays(predictions_, demoFrame_, l.outputs, avg_);
l.output = lastAvg2_;
if (demoDelay_ == 0)
l.output = avg_;
if (l.type == DETECTION) {
get_detection_boxes(l, 1, 1, demoThresh_, probs_, boxes_, 0);
} else if (l.type == REGION) {
get_region_boxes(l, buff_[0].w, buff_[0].h, net_.w, net_.h, demoThresh_, probs_, boxes_, 0, 0,
demoHier_, 1);
} else {
error("Last layer must produce detections\n");
}
if (nms > 0)
do_nms_obj(boxes_, probs_, l.w * l.h * l.n, l.classes, nms);
if (enableConsoleOutput_) {
printf("\nFPS:%.1f\n", fps_);
printf("Objects:\n\n");
}
image display = buff_[(buffIndex_ + 2) % 3];
draw_detections(display, demoDetections_, demoThresh_, boxes_, probs_, demoNames_, demoAlphabet_,
demoClasses_);
// extract the bounding boxes and send them to ROS
int total = l.w * l.h * l.n;
int i, j;
int count = 0;
for (i = 0; i < total; ++i) {
float xmin = boxes_[i].x - boxes_[i].w / 2.;
float xmax = boxes_[i].x + boxes_[i].w / 2.;
float ymin = boxes_[i].y - boxes_[i].h / 2.;
float ymax = boxes_[i].y + boxes_[i].h / 2.;
if (xmin < 0)
xmin = 0;
if (ymin < 0)
ymin = 0;
if (xmax > 1)
xmax = 1;
if (ymax > 1)
ymax = 1;
// iterate through possible boxes and collect the bounding boxes
for (j = 0; j < l.classes; ++j) {
if (probs_[i][j]) {
float x_center = (xmin + xmax) / 2;
float y_center = (ymin + ymax) / 2;
float BoundingBox_width = xmax - xmin;
float BoundingBox_height = ymax - ymin;
// define bounding box
// BoundingBox must be 1% size of frame (3.2x2.4 pixels)
if (BoundingBox_width > 0.01 && BoundingBox_height > 0.01) {
roiBoxes_[count].x = x_center;
roiBoxes_[count].y = y_center;
roiBoxes_[count].w = BoundingBox_width;
roiBoxes_[count].h = BoundingBox_height;
roiBoxes_[count].Class = j;
roiBoxes_[count].prob = probs_[i][j];
count++;
}
}
}
}
// create array to store found bounding boxes
// if no object detected, make sure that ROS knows that num = 0
if (count == 0) {
roiBoxes_[0].num = 0;
} else {
roiBoxes_[0].num = count;
}
demoIndex_ = (demoIndex_ + 1) % demoFrame_;
running_ = 0;
return 0;
}
void *YoloObjectDetector::displayInThread(void *ptr)
{
show_image_cv(buff_[(buffIndex_ + 1) % 3], "Demo", ipl_);
int c = cvWaitKey(waitKeyDelay_);
if (c != -1)
c = c % 256;
if (c == 10) {
if (demoDelay_ == 0)
demoDelay_ = 60;
else if (demoDelay_ == 5)
demoDelay_ = 0;
else if (demoDelay_ == 60)
demoDelay_ = 5;
else
demoDelay_ = 0;
} else if (c == 27) {
demoDone_ = 1;
return 0;
} else if (c == 82) {
demoThresh_ += .02;
} else if (c == 84) {
demoThresh_ -= .02;
if (demoThresh_ <= .02)
demoThresh_ = .02;
} else if (c == 83) {
demoHier_ += .02;
} else if (c == 81) {
demoHier_ -= .02;
if (demoHier_ <= .0)
demoHier_ = .0;
}
return 0;
}
void *YoloObjectDetector::displayLoop(void *ptr)
{
while (1) {
displayInThread(0);
}
}
void *YoloObjectDetector::detectLoop(void *ptr)
{
while (1) {
detectInThread();
}
}
void YoloObjectDetector::setupNetwork(char *cfgfile, char *weightfile, char *datafile, float thresh,
char **names, int classes,
int delay, char *prefix, int avg_frames, float hier, int w, int h,
int frames, int fullscreen)
{
demoPrefix_ = prefix;
demoDelay_ = delay;
demoFrame_ = avg_frames;
predictions_ = (float **) calloc(demoFrame_, sizeof(float*));
image **alphabet = load_alphabet_with_file(datafile);
demoNames_ = names;
demoAlphabet_ = alphabet;
demoClasses_ = classes;
demoThresh_ = thresh;
demoHier_ = hier;
fullScreen_ = fullscreen;
printf("YOLO_V2\n");
net_ = parse_network_cfg(cfgfile);
if (weightfile) {
load_weights(&net_, weightfile);
}
set_batch_network(&net_, 1);
}
void YoloObjectDetector::yolo()
{
const auto wait_duration = std::chrono::milliseconds(2000);
while (!getImageStatus()) {
printf("Waiting for image.\n");
if (!isNodeRunning()) {
return;
}
std::this_thread::sleep_for(wait_duration);
}
std::thread detect_thread;
std::thread fetch_thread;
srand(2222222);
layer l = net_.layers[net_.n - 1];
demoDetections_ = l.n * l.w * l.h;
int j;
avg_ = (float *) calloc(l.outputs, sizeof(float));
lastAvg_ = (float *) calloc(l.outputs, sizeof(float));
lastAvg2_ = (float *) calloc(l.outputs, sizeof(float));
for (j = 0; j < demoFrame_; ++j)
predictions_[j] = (float *) calloc(l.outputs, sizeof(float));
boxes_ = (box *) calloc(l.w * l.h * l.n, sizeof(box));
roiBoxes_ = (darknet_ros::RosBox_ *) calloc(l.w * l.h * l.n, sizeof(darknet_ros::RosBox_));
probs_ = (float **) calloc(l.w * l.h * l.n, sizeof(float *));
for (j = 0; j < l.w * l.h * l.n; ++j)
probs_[j] = (float *) calloc(l.classes + 1, sizeof(float));
IplImage* ROS_img = getIplImage();
buff_[0] = ipl_to_image(ROS_img);
buff_[1] = copy_image(buff_[0]);
buff_[2] = copy_image(buff_[0]);
buffLetter_[0] = letterbox_image(buff_[0], net_.w, net_.h);
buffLetter_[1] = letterbox_image(buff_[0], net_.w, net_.h);
buffLetter_[2] = letterbox_image(buff_[0], net_.w, net_.h);
ipl_ = cvCreateImage(cvSize(buff_[0].w, buff_[0].h), IPL_DEPTH_8U, buff_[0].c);
int count = 0;
if (!demoPrefix_ && viewImage_) {
cvNamedWindow("Demo", CV_WINDOW_NORMAL);
if (fullScreen_) {
cvSetWindowProperty("Demo", CV_WND_PROP_FULLSCREEN, CV_WINDOW_FULLSCREEN);
} else {
cvMoveWindow("Demo", 0, 0);
cvResizeWindow("Demo", 640, 480);
}
}
demoTime_ = getWallTime();
while (!demoDone_) {
buffIndex_ = (buffIndex_ + 1) % 3;
fetch_thread = std::thread(&YoloObjectDetector::fetchInThread, this);
detect_thread = std::thread(&YoloObjectDetector::detectInThread, this);
if (!demoPrefix_) {
if (count % (demoDelay_ + 1) == 0) {
fps_ = 1. / (getWallTime() - demoTime_);
demoTime_ = getWallTime();
float *swap = lastAvg_;
lastAvg_ = lastAvg2_;
lastAvg2_ = swap;
memcpy(lastAvg_, avg_, l.outputs * sizeof(float));
}
if (viewImage_) {
displayInThread(0);
}
publishInThread();
} else {
char name[256];
sprintf(name, "%s_%08d", demoPrefix_, count);
save_image(buff_[(buffIndex_ + 1) % 3], name);
}
fetch_thread.join();
detect_thread.join();
++count;
if (!isNodeRunning()) {
demoDone_ = true;
}
}
}
IplImage* YoloObjectDetector::getIplImage()
{
boost::shared_lock<boost::shared_mutex> lock(mutexImageCallback_);
IplImage* ROS_img = new IplImage(camImageCopy_);
return ROS_img;
}
bool YoloObjectDetector::getImageStatus(void)
{
boost::shared_lock<boost::shared_mutex> lock(mutexImageStatus_);
return imageStatus_;
}
bool YoloObjectDetector::isNodeRunning(void)
{
boost::shared_lock<boost::shared_mutex> lock(mutexNodeStatus_);
return isNodeRunning_;
}
void *YoloObjectDetector::publishInThread()
{
// Publish image.
cv::Mat cvImage = cv::cvarrToMat(ipl_);
if (!publishDetectionImage(cv::Mat(cvImage))) {
ROS_DEBUG("Detection image has not been broadcasted.");
}
// Publish bounding boxes and detection result.
int num = roiBoxes_[0].num;
if (num > 0 && num <= 100) {
for (int i = 0; i < num; i++) {
for (int j = 0; j < numClasses_; j++) {
if (roiBoxes_[i].Class == j) {
rosBoxes_[j].push_back(roiBoxes_[i]);
rosBoxCounter_[j]++;
}
}
}
std_msgs::Int8 msg;
msg.data = num;
objectPublisher_.publish(msg);
for (int i = 0; i < numClasses_; i++) {
if (rosBoxCounter_[i] > 0) {
darknet_ros_msgs::BoundingBox boundingBox;
for (int j = 0; j < rosBoxCounter_[i]; j++) {
int xmin = (rosBoxes_[i][j].x - rosBoxes_[i][j].w / 2) * frameWidth_;
int ymin = (rosBoxes_[i][j].y - rosBoxes_[i][j].h / 2) * frameHeight_;
int xmax = (rosBoxes_[i][j].x + rosBoxes_[i][j].w / 2) * frameWidth_;
int ymax = (rosBoxes_[i][j].y + rosBoxes_[i][j].h / 2) * frameHeight_;
boundingBox.Class = classLabels_[i];
boundingBox.probability = rosBoxes_[i][j].prob;
boundingBox.xmin = xmin;
boundingBox.ymin = ymin;
boundingBox.xmax = xmax;
boundingBox.ymax = ymax;
boundingBoxesResults_.boundingBoxes.push_back(boundingBox);
}
}
}
boundingBoxesResults_.header.stamp = ros::Time::now();
boundingBoxesResults_.header.frame_id = "detection";
boundingBoxesPublisher_.publish(boundingBoxesResults_);
} else {
std_msgs::Int8 msg;
msg.data = 0;
objectPublisher_.publish(msg);
}
if (isCheckingForObjects()) {
ROS_DEBUG("[YoloObjectDetector] check for objects in image.");
darknet_ros_msgs::CheckForObjectsResult objectsActionResult;
objectsActionResult.id = buffId_[0];
objectsActionResult.boundingBoxes = boundingBoxesResults_;
checkForObjectsActionServer_->setSucceeded(objectsActionResult, "Send bounding boxes.");
}
boundingBoxesResults_.boundingBoxes.clear();
for (int i = 0; i < numClasses_; i++) {
rosBoxes_[i].clear();
rosBoxCounter_[i] = 0;
}
return 0;
}
} /* namespace darknet_ros*/