Detailed Description

A class for grabing images from a "OpenCV"-compatible camera, or from an AVI video file.

See the constructor for the options when opening the camera.

Unless input from AVI files is required, it is recommended to use the more generic class mrpt::hwdrivers::CCameraSensor.

Note: This class is only available when compiling MRPT with the flag "MRPT_HAS_OPENCV" defined.; Some code is based on the class CaptureCamera from the Orocos project.

See also: mrpt::hwdrivers::CCameraSensor, CImageGrabber_dc1394; The most generic camera grabber in MRPT: mrpt::hwdrivers::CCameraSensor

Definition at line 74 of file CImageGrabber_OpenCV.h.

#include <mrpt/hwdrivers/CImageGrabber_OpenCV.h>

Public Member Functions
	CImageGrabber_OpenCV (int cameraIndex=-1, TCameraType cameraType=CAMERA_CV_AUTODETECT, const TCaptureCVOptions &options=TCaptureCVOptions())
	Constructor for cameras: More...

	CImageGrabber_OpenCV (const std::string &AVI_fileName)
	Constructor for AVI files: More...

virtual	~CImageGrabber_OpenCV ()
	Destructor. More...

bool	isOpen () const
	Check whether the camera has been open successfully. More...

bool	getObservation (mrpt::obs::CObservationImage &out_observation)
	Grab an image from the opened camera. More...

Protected Attributes
bool	m_bInitialized
	Set to false if we could not initialize the camera. More...

mrpt::utils::void_ptr_noncopy	m_capture
	Internal use: More...

Constructor & Destructor Documentation

◆ CImageGrabber_OpenCV() [1/2]

CImageGrabber_OpenCV::CImageGrabber_OpenCV	(	int	cameraIndex = `-1`,
		TCameraType	cameraType = `CAMERA_CV_AUTODETECT`,
		const TCaptureCVOptions &	options = `TCaptureCVOptions()`
	)

Constructor for cameras:

Parameters

cameraIndex	Set the camera index, or -1 if it does not matter and you select AUTODETECT as cameraType.
cameraType	Can be any value of TCameraType, or CAMERA_CV_AUTODETECT if there is only one camera.
options	Capture options, defined in mrpt::hwdrivers::TCaptureCVOptions. If not provided, all the default options will be used.

Definition at line 27 of file CImageGrabber_OpenCV.cpp.

References mrpt::hwdrivers::CAMERA_CV_AUTODETECT, mrpt::hwdrivers::CAMERA_CV_DC1394, mrpt::hwdrivers::CAMERA_CV_DSHOW, mrpt::hwdrivers::CAMERA_CV_MIL, mrpt::hwdrivers::CAMERA_CV_VFL, mrpt::hwdrivers::CAMERA_CV_VFW, mrpt::hwdrivers::TCaptureCVOptions::frame_height, mrpt::hwdrivers::TCaptureCVOptions::frame_width, mrpt::hwdrivers::TCaptureCVOptions::gain, mrpt::hwdrivers::TCaptureCVOptions::ieee1394_fps, mrpt::hwdrivers::TCaptureCVOptions::ieee1394_grayscale, M_CAPTURE, MRPT_END, MRPT_START, THROW_EXCEPTION, and THROW_EXCEPTION_FMT.

◆ CImageGrabber_OpenCV() [2/2]

CImageGrabber_OpenCV::CImageGrabber_OpenCV ( const std::string & AVI_fileName )

Constructor for AVI files:

Definition at line 206 of file CImageGrabber_OpenCV.cpp.

References MRPT_END, MRPT_START, and THROW_EXCEPTION.

◆ ~CImageGrabber_OpenCV()

CImageGrabber_OpenCV::~CImageGrabber_OpenCV ( )

virtual

Destructor.

Definition at line 235 of file CImageGrabber_OpenCV.cpp.

References M_CAPTURE.

Member Function Documentation

◆ getObservation()

bool CImageGrabber_OpenCV::getObservation ( mrpt::obs::CObservationImage & out_observation )

Grab an image from the opened camera.

Parameters

out_observation The object to be filled with sensed data.

Returns: false on any error, true if all go fine.

Definition at line 250 of file CImageGrabber_OpenCV.cpp.

References mrpt::obs::CObservationImage::image, M_CAPTURE, MRPT_END, MRPT_START, mrpt::system::now(), mrpt::utils::CImage::setFromIplImageReadOnly(), THROW_EXCEPTION, and mrpt::obs::CObservation::timestamp.

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◆ isOpen()

bool mrpt::hwdrivers::CImageGrabber_OpenCV::isOpen ( ) const

inline

Check whether the camera has been open successfully.

Definition at line 108 of file CImageGrabber_OpenCV.h.

References m_bInitialized.

Member Data Documentation

◆ m_bInitialized

bool mrpt::hwdrivers::CImageGrabber_OpenCV::m_bInitialized

protected

Set to false if we could not initialize the camera.

Definition at line 79 of file CImageGrabber_OpenCV.h.

Referenced by isOpen().

◆ m_capture

mrpt::utils::void_ptr_noncopy mrpt::hwdrivers::CImageGrabber_OpenCV::m_capture