Hi Rolf, Thank you for clarifying this, you can always make things easy understand....But that was what I meant that IVision is Directshow based (accessing to WDM and VFW driver) other than some other drivers are just VFW based...but somehow I wrote it wrong :-)
Anyway, it's always very educational to read your posts. Regards, Irene ----- Original Message ----- From: "Rolf Kalbermatter" <[EMAIL PROTECTED]> To: "'Irene He'" <[EMAIL PROTECTED]> Cc: "Info LabVIEW (E-mail)" <[EMAIL PROTECTED]> Sent: Thursday, May 27, 2004 5:26 AM Subject: Re: webcam "Irene He" <[EMAIL PROTECTED]> wrote >Or you can try this link too: >http://www.hytekautomation.com/Products/IVision.html >Besides the image capturing, it has also many camera control functions and >image processing functions. It's WDM based, has many advantages over VFW >based drivers. (I think VFW is being abandoned). WDM is the device driver accessing the hardware. It is not just video capture but all modern W2K and XP drivers are usually that. VfW is one of the APIs to access multimedia image acquisition hardware. I think an application does not access a WDM driver directly but uses DirectShow or whatever Direct... for that. As such VfW is not state of the art anymore (you could say its use is deprecated) but a lot of WDM based video grabbers still have a VfW wrapper and failing that there is always a DirectShow to VfW wrapper. The advantage of VfW is its simple use and a lot of applications (including many commercial ones) still depend on it. That said a DirectShow access to a WDM grabber driver will usually be more performant than through VfW. Rolf Kalbermatter CIT Engineering Nederland BV tel: +31 (070) 415 9190 Treubstraat 7H fax: +31 (070) 415 9191 2288 EG Rijswijk http://www.citengineering.com Netherlands mailto:[EMAIL PROTECTED]
