Enquiry: Guppy firewire camera image aquisition too slow,why?

[yu_guo]

Hello everyone,

we use Guppy F503B(IEEE1394A,2592X1944,up to 6.5fps) camera for image aquisition, but found image aquisition speed is too slow. no matter IMAQdx snap or grab used, a single image aquisition cost 1.8 seconds (video mode is Format 7, mode6, 2592x1944). try to change video mode to Format 7,mode6,1296x972, image aquisition time changed from 1.8 s to 1.23s. it is found shutter set to 2000, try to decrease or increase the shutter value (shutter range is 0 to 4096) but no improvement. the PC OS is windows XP SP2, pls see attached for camera setting. since our application is strict for time consuming, so 1.2s image aquisition is not  accepted. and 1.2s is abnormal for image capturing, right? can advice what else to cause the image aquisition speed too slow, and how to improve it?

thanks a lot !

[oliver.guennel]

Hello yu guo,

you need to set the camera Iso speed to 400Mbit and the packet size to 4096. With S100, the bandwidth for the camera is restricted and slowing down the transfer rate.

If you can't set S400, you are probably using a 1394b card or hub in the camera setup. Please install the AVT 1394 BusDriverPackage to be able to switch to S400:

http://www.alliedvisiontec.com/emea/products/software/windows/avt-1394-busdriverpackage.html

[yu_guo]

Hi Oliver,

Thanks for your reply. before I download AVT 1394 BusDriverPackage, in MAX, Speed is 100Mbps and can not be set with other values, packet size is 1024 bytes (maximum value). after I download AVT 1394 BusDriverPackage and install in the PC, open NI MAX, found Speed and packet size still the same, can not be set to the value as you recommended.

we use NI PCIe-8255R digital frame grabber in the PC. Pls advice. Thanks!

[oliver.guennel · Accepted solution]

Hello yu guo,

the NI PCIe-8255R is a 1394B card, which explains the drop to 100MBit in your XP SP2. Please make sure, that the driver is installed on the device to enable 1394B support in your OS. For this, open the driver installation tool of the "AVT 1394 Bus driver installer", select the Host controller and select "Switch to AVT 1394 bus driver". The "Driver Provider" must switch from "Microsoft" to "Allied Vision Technologies GmbH".

[yu_guo]

Hi Oliver,

Great! it works. now can set to 400Mbit and packate to 4096. frame changed to 6 in MAX (previously is 2). now I am still doing image processing optimization to further reduce the time cost. Thanks a lot.