Example for opencv_grabber (opencv_grabber_basic)

Instantiates opencv_grabber device implemented by OpenCVGrabber. More...

Collaboration diagram for Example for opencv_grabber (opencv_grabber_basic):

Instantiates opencv_grabber device implemented by OpenCVGrabber.

# read a camera using opencv
device opencv_grabber

If this text is saved in a file called opencv_grabber_basic.ini then the device can be created by doing:

yarpdev --file opencv_grabber_basic.ini

Of course, the configuration could be passed just as command line options, or as a yarp::os::Property object in a program:

Property p;
p.fromConfigFile("opencv_grabber_basic.ini");
// of course you could construct the Property object on-the-fly
PolyDriver dev;
dev.open(p);
if (dev.isValid()) { /* use the device via view method */ }

Here is a list of properties checked when starting up a device based on this configuration file. Note that which properties are checked can depend on whether other properties are present. In some cases properties can also vary between operating systems. So this is just an example

PROPERTY	DESCRIPTION	DEFAULT
device
movie	if present, read from specified file rather than camera
camera	if present, read from camera identified by this index	0
framerate	if present, specifies desired camera device framerate
flip_x	if present, flip the image along the x-axis
flip_y	if present, flip the image along the y-axis
transpose	if present, rotate the image along of 90 degrees
width	if present, specifies desired image width
height	if present, specifies desired image height

See also

OpenCVGrabber