Displaying camera images twice

Folks,
   I have a small problem with the camera initialization..I guess I posed
this question in a different way and haven't been too clear..I've included
the code fragment below..

I have 2 functions, both which need to call the camera display routines.
After I load one, how do I change control from one function to another..

Thanks a lot,
regards,
Arvind

*******************************************************************
void CGUIDlg::OnButton1LoadImage()
{
	// TODO: Add your control notification handler code here

	CoInitialize(NULL);
	//initialize applications
    init();

	//start the video capture
	camera.Init(0,xsize,ysize);
	camera.SetFlippedImage(true);
	argMainLoop(NULL,keyEvent,show);

	/* get ready to grab a new video frame */
	argSwapBuffers();

	CoUninitialize();

}

void CGUIDlg::OnButton2Track()
{
	// TODO: Add your control notification handler code here

	ARUint8         *dataPtr;
    ARMarkerInfo    *marker_info;
    int             marker_num;
    int             j, k;

	/* get ready to grab a new video frame */
	//argSwapBuffers();

	CoInitialize(NULL);
	init();

	//start the video capture
	camera.Init(0,xsize,ysize);
	camera.SetFlippedImage(true);

	argMainLoop(NULL,keyEvent,mainLoop);

	CoUninitialize();

}

Arvind Lakshmikumar
Research Scholar
Robotics Institute
Carnegie Mellon University
Pittsburgh, PA 15213-3890
Phone: 412 421 0824 (H)
       412 268 5905 (W)

email: kla@c .........

					Linux is like a Teepee,
					No Windows, No Gates,
					Only Apache Inside!

From:	Arvind Lakshmikumar <kla@c .........>	Received:	Feb 17, 2003
To	artoolkit@h ..................
Subject:	Displaying camera images twice
Folks, I have a small problem with the camera initialization..I guess I posed this question in a different way and haven't been too clear..I've included the code fragment below.. I have 2 functions, both which need to call the camera display routines. After I load one, how do I change control from one function to another.. Thanks a lot, regards, Arvind ******************************************************************* void CGUIDlg::OnButton1LoadImage() { // TODO: Add your control notification handler code here CoInitialize(NULL); //initialize applications init(); //start the video capture camera.Init(0,xsize,ysize); camera.SetFlippedImage(true); argMainLoop(NULL,keyEvent,show); /* get ready to grab a new video frame / argSwapBuffers(); CoUninitialize(); } void CGUIDlg::OnButton2Track() { // TODO: Add your control notification handler code here ARUint8 dataPtr; ARMarkerInfo marker_info; int marker_num; int j, k; / get ready to grab a new video frame */ //argSwapBuffers(); CoInitialize(NULL); init(); //start the video capture camera.Init(0,xsize,ysize); camera.SetFlippedImage(true); argMainLoop(NULL,keyEvent,mainLoop); CoUninitialize(); } Arvind Lakshmikumar Research Scholar Robotics Institute Carnegie Mellon University Pittsburgh, PA 15213-3890 Phone: 412 421 0824 (H) 412 268 5905 (W) email: kla@c ......... Linux is like a Teepee, No Windows, No Gates, Only Apache Inside!

From:	Arvind Lakshmikumar <kla@c .........>	Received:	Feb 17, 2003
To	artoolkit@h ..................
Subject:	Displaying camera images twice
Folks, I have a small problem with the camera initialization..I guess I posed this question in a different way and haven't been too clear..I've included the code fragment below.. I have 2 functions, both which need to call the camera display routines. After I load one, how do I change control from one function to another.. Thanks a lot, regards, Arvind ******************************************************************* void CGUIDlg::OnButton1LoadImage() { // TODO: Add your control notification handler code here CoInitialize(NULL); //initialize applications init(); //start the video capture camera.Init(0,xsize,ysize); camera.SetFlippedImage(true); argMainLoop(NULL,keyEvent,show); /* get ready to grab a new video frame / argSwapBuffers(); CoUninitialize(); } void CGUIDlg::OnButton2Track() { // TODO: Add your control notification handler code here ARUint8 dataPtr; ARMarkerInfo marker_info; int marker_num; int j, k; / get ready to grab a new video frame */ //argSwapBuffers(); CoInitialize(NULL); init(); //start the video capture camera.Init(0,xsize,ysize); camera.SetFlippedImage(true); argMainLoop(NULL,keyEvent,mainLoop); CoUninitialize(); } Arvind Lakshmikumar Research Scholar Robotics Institute Carnegie Mellon University Pittsburgh, PA 15213-3890 Phone: 412 421 0824 (H) 412 268 5905 (W) email: kla@c ......... Linux is like a Teepee, No Windows, No Gates, Only Apache Inside!

From:	Hartmut Seichter <hartmut@t ................>	Received:	Feb 18, 2003
To	artoolkit@h ..................
Subject:	Re: Displaying camera images twice
Arvind Lakshmikumar wrote: <snip/> Sorry, but first of all state clear what u wanna do. The functions do not give any hint what's the idea behind. To make a fairly wild guess is that u wanna start two capturing processes on the same camera? If that is the case I think your aproach does not work at all, due to the fact that ARToolKit is messed up with static global variables. /Hartmut -- technotecture studio ___________ building your next reality

From:	Hartmut Seichter <hartmut@t ................>	Received:	Feb 18, 2003
To	artoolkit@h ..................
Subject:	Re: Displaying camera images twice
Arvind Lakshmikumar wrote: <snip/> Sorry, but first of all state clear what u wanna do. The functions do not give any hint what's the idea behind. To make a fairly wild guess is that u wanna start two capturing processes on the same camera? If that is the case I think your aproach does not work at all, due to the fact that ARToolKit is messed up with static global variables. /Hartmut -- technotecture studio ___________ building your next reality

From:	Hartmut Seichter <hartmut@t ................>	Received:	Feb 18, 2003
To	artoolkit@h ..................
Subject:	Re: Displaying camera images twice
Arvind Lakshmikumar wrote: please, always answer to the Mailinglist and not directly to me. Can somebody fix this and add a Reply-To for the mailinglist. Arvind, I really why u don't pass the picture from your display process to the marker detection? You have to split your approach in: - initializing - press button a -> capture image -> show marker - press button b -> capture image -> detect marker Initializing the camera twice does not work until u unitialize it before, which makes no real sense. /retrakker > Hi Harmut, > I realize that I can't capture twice from 2 different processes. I have > a GUI that has say 2 buttons..One Get Image and one Track marker. When I > press get Image, I just want to display the image seen by the camera. Then > when I press Track Marker, I want to call the function that does the > tracking..So I guess when I press the second button, I need to be able to > switch the camera function by disabling its association with the previous > call.. -- technotecture studio ___________ building your next reality