Inheritance diagram for opencv_apps::FindContoursNodelet:

Public Member Functions
virtual void	onInit ()
	Initialize nodehandles nh_ and pnh_. Subclass should call this method in its onInit method.
Private Types
typedef opencv_apps::FindContoursConfig	Config
typedef dynamic_reconfigure::Server < Config >	ReconfigureServer
Private Member Functions
void	doWork (const sensor_msgs::ImageConstPtr &msg, const std::string &input_frame_from_msg)
const std::string &	frameWithDefault (const std::string &frame, const std::string &image_frame)
void	imageCallback (const sensor_msgs::ImageConstPtr &msg)
void	imageCallbackWithInfo (const sensor_msgs::ImageConstPtr &msg, const sensor_msgs::CameraInfoConstPtr &cam_info)
void	reconfigureCallback (Config &new_config, uint32_t level)
void	subscribe ()
	This method is called when publisher is subscribed by other nodes. Set up subscribers in this method.
void	unsubscribe ()
	This method is called when publisher is unsubscribed by other nodes. Shut down subscribers in this method.
Static Private Member Functions
static void	trackbarCallback (int, void *)
Private Attributes
image_transport::CameraSubscriber	cam_sub_
Config	config_
bool	debug_view_
image_transport::Publisher	img_pub_
image_transport::Subscriber	img_sub_
boost::shared_ptr < image_transport::ImageTransport >	it_
int	low_threshold_
ros::Publisher	msg_pub_
ros::Time	prev_stamp_
int	queue_size_
boost::shared_ptr < ReconfigureServer >	reconfigure_server_
std::string	window_name_
Static Private Attributes
static bool	need_config_update_ = false

Detailed Description

Definition at line 60 of file find_contours_nodelet.cpp.

Member Typedef Documentation

typedef opencv_apps::FindContoursConfig opencv_apps::FindContoursNodelet::Config [private]

Definition at line 69 of file find_contours_nodelet.cpp.

Definition at line 70 of file find_contours_nodelet.cpp.

void opencv_apps::FindContoursNodelet::doWork	(	const sensor_msgs::ImageConstPtr &	msg,
		const std::string &	input_frame_from_msg
	)		`[inline, private]`

Convert it to gray

Create window

Reduce noise with a kernel 3x3

Canny detector

Find contours

Draw contours

Create a Trackbar for user to enter threshold

Definition at line 111 of file find_contours_nodelet.cpp.

const std::string& opencv_apps::FindContoursNodelet::frameWithDefault	(	const std::string &	frame,
		const std::string &	image_frame
	)		`[inline, private]`

Definition at line 89 of file find_contours_nodelet.cpp.

void opencv_apps::FindContoursNodelet::imageCallback ( const sensor_msgs::ImageConstPtr & msg ) [inline, private]

Definition at line 101 of file find_contours_nodelet.cpp.

void opencv_apps::FindContoursNodelet::imageCallbackWithInfo	(	const sensor_msgs::ImageConstPtr &	msg,
		const sensor_msgs::CameraInfoConstPtr &	cam_info
	)		`[inline, private]`