Re: Video resolution

Hi i managed to resize the window,

the parameter for cvNamedWindow should be 0...

but i cant set the resolution for the image.

the following is a segment of my code:

cvSetCaptureProperty(capture, CV_CAP_PROP_FRAME_WIDTH, 320);
cvSetCaptureProperty(capture,CV_CAP_PROP_FRAME_HEIGHT, 240);

frame = cvRetrieveFrame(capture);

frame_copy = cvCreateImage (cvSize(frame->width, frame->height), 
IPL_DEPTH_8U, frame->nChannels);


i thought the resolution of the frame_copy should be 320x240 but it is still 
640x480 when i capture an image of it.

anybody know why this is so?

Regards
KJ
>From: "Kok Jun" <ck_jun@xxxxxxxxxxx>
>Reply-To: OpenCV@xxxxxxxxxxxxxxx
>To: OpenCV@xxxxxxxxxxxxxxx
>Subject: Re: [OpenCV] Video resolution
>Date: Thu, 30 Mar 2006 14:21:41 +0800
>
>Hi i tried doing what you suggested. I tried it on a webcam as well as on a
>matrox frame capture card.
>
>for the webcam, there was no effect, the window still remained the same
>size...
>
>for the matrox, there was an error and the program had to terminate...would
>you know what the problem might be?
>
>Regards
>KJ
>
>
> >From: Rafael Nevarez <epilef99@xxxxxxxxx>
> >Reply-To: OpenCV@xxxxxxxxxxxxxxx
> >To: OpenCV@xxxxxxxxxxxxxxx
> >Subject: Re: [OpenCV] Video resolution
> >Date: Tue, 28 Mar 2006 09:29:11 -0800 (PST)
> >
> >Hi
> >
> >     If you want to change the resolution of the captured frame, use:
> >
> >  cvSetCaptureProperty(frame, CV_CAP_PROP_FRAME_WIDTH, 320); //640
> >  cvSetCaptureProperty(frame, CV_CAP_PROP_FRAME_HEIGHT, 240); //480
> >
> >     Or if you want to only to change the size of the window use:
> >
> >      cvNamedWindow("camara", 1); //CV_WINDOW_AUTOSIZE);  Set to the size
> >of the frame
> >      cvResizeWindow("camara", 320, 240);
> >
> >  Regards
> >
> >Kok Jun <ck_jun@xxxxxxxxxxx> wrote:    hi,
> >
> >  when i use the function cvCaptureFromCam(-1), it automatically displays 
>a
> >  window of a default size.
> >
> >  what can i do so that the display window will be of the size 320x240?
> >
> >  thanks!!
> >
> >  Regards
> >  KJ
> >
> >
> >
> >
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