Grab an image from the specified frame grabber.
The operator ::grab_image grabs an image via the frame grabber specified by FGHandle. The desired operational mode of the frame grabber as well as a suitable image area can be adjusted via the operator ::open_framegrabber. Additional (frame grabber specific) settings might be possible via ::set_framegrabber_param.
|
Image (output_object) |
image -> Hobject * : HImage |
| Grabbed image. | |
|
FGHandle (input_control) |
framegrabber -> HTuple.long |
| Handle of the frame grabber to be used. | |
/* Select a suitable frame grabber FgName */
info_framegrabber(FgName,"ports",&Information,&Val) ;
/* Choose the port P and the input line L your camera is connected to */
open_framegrabber(FgName,1,1,0,0,0,0,"default",-1,"default",-1.0,
"default","default","default",P,L,&FgHandle) ;
grab_image(&Img,FgHandle) ;
close_framegrabber(FgHandle) ;
If the frame grabber is open the operator ::grab_image returns the value H_MSG_TRUE. Otherwise an exception handling is raised.
::open_framegrabber, ::grab_image_start
::grab_image, ::grab_image_start, ::grab_image_async, ::close_framegrabber
::open_framegrabber, ::info_framegrabber, ::set_framegrabber_param
Image / region / XLD management
