IMAQ usb image capture

[boonkeat]

hi all.

i would like to ask how to capture still image from the webcam in a faster rate.

currently it was capturing image around 2 second per shot using a unbranded webcam and saving the file with .BMP format

i am using IMAQ USB function.

1.what is influencing the webcam capture rate?

2. what kind of spec i should look for when buying a webcam so that it wil capture in fast rate.

Download File:post-7223-1167973147.vi

[alipio]

Hi

The webcam, video compression and PC have influence in snap speed.

Programming has a lot of influence, too.

A producer/consumer scheme will improve speed, too.

Using a logitech 4000 pro and a Pentium III -750 Mhz- I can capture almost 4 images per second, usin the attached vi- a modification or NI example for continous snap-.

On a powerfull PC and a 5000 pro webcam, speeds are better.

Try this vi. Webcam only needs to be initilizad once.

Cheers

Alipio

Download File:post-6361-1168509410.vi