Problem with the size of the Video Image

Hi,
my problem is the following:

the hard coded size of the video capture is 320x240.
But the returned size of the glut window with
glutGet(GLUT_WINDOW_HEIGHT) is 640x480.
Can anybody explain this to me please?

I need this information cause i want to read out some masked pixels of the
window, but its a problem to know whicht size to use, cause glReadPixels
only works with 320x240 but the buffersize of the camera is 640x480.
I didnt get this.
Thanks for any help.

Fabian

From:	"Fabian Scheer" <fabian@r .................>	Received:	Jan 13, 2005
To	<artoolkit@h ..................>
Subject:	Problem with the size of the Video Image
Hi, my problem is the following: the hard coded size of the video capture is 320x240. But the returned size of the glut window with glutGet(GLUT_WINDOW_HEIGHT) is 640x480. Can anybody explain this to me please? I need this information cause i want to read out some masked pixels of the window, but its a problem to know whicht size to use, cause glReadPixels only works with 320x240 but the buffersize of the camera is 640x480. I didnt get this. Thanks for any help. Fabian

From:	Philip Lamb <phil@e ..........>	Received:	Jan 13, 2005
To	Fabian Scheer <fabian@r .................>, artoolkit@h ..................
Subject:	Re: Problem with the size of the Video Image
At 12:14 AM +0100 13/1/05, Fabian Scheer wrote: >Hi, >my problem is the following: > >the hard coded size of the video capture is 320x240. >But the returned size of the glut window with >glutGet(GLUT_WINDOW_HEIGHT) is 640x480. >Can anybody explain this to me please? > >I need this information cause i want to read out some masked pixels of the >window, but its a problem to know whicht size to use, cause glReadPixels >only works with 320x240 but the buffersize of the camera is 640x480. >I didnt get this. >Thanks for any help. > >Fabian What version of the toolkit, what OS, what camera, and which example code? Regards, Phil

From:	Philip Lamb <phil@e ..........>	Received:	Jan 13, 2005
To	Fabian Scheer <fabian@r .................>
Subject:	Re: Problem with the size of the Video Image
At 12:36 AM +0100 1/13/05, Fabian Scheer wrote: > > At 12:14 AM +0100 13/1/05, Fabian Scheer wrote: >> >Hi, >> >my problem is the following: >> > >> >the hard coded size of the video capture is 320x240. >> >But the returned size of the glut window with >> >glutGet(GLUT_WINDOW_HEIGHT) is 640x480. >> >Can anybody explain this to me please? >> > >> >I need this information cause i want to read out some masked pixels of >the >> >window, but its a problem to know whicht size to use, cause glReadPixels >> >only works with 320x240 but the buffersize of the camera is 640x480. >> >I didnt get this. >> >Thanks for any help. >> > > >Fabian >Version is ARToolkitDirectShow 2.52 vrml >Os is Windows XP >Camera is the unibrain fire-i >Sample Code is the SimpleVRML > >Thanks. >Fabian Fabian, I would recommend trying first the simpleVRML example in ARToolKit 2.70. A lot of code dealing with video input and output has changed (improved hopefully!) since 2.52. If you're still having problems with 2.70, we should be able to help diagnose it a lot more readily. Regards, -- Philip Lamb