How to put signal in spreadsheet

[alias14]

Hello National Instruments,

I need to take a .bmp file which is a picture of 5 lights. I then need to
get
the average signal of the 5 lights and the average signal of the
background.
Then take a ratio of lights to background to determine signal to noise
ratio.
The following have been provided:
"Acquire sequence and save with NI-IMAQ.vi"
"DualCameraAcquireSave.vi"

Are these provided by National Instruments, or are they something that
somebody
wrote in-house?

Do you have any suggestion as to how I should go about accomplishing the
task
described above?

Thanks,
Ann

[Julie S]

Ann - The VIs you mentioned are not provided by NI, but they do sound like they use functions from the NI-IMAQ driver, which is used with National Instruments image acquisition boards.
If you have the IMAQ Vision software, it will be very easy to take the average signal of the images. Here is an example program that will do this for you:

IMAQ Running Average in LabVIEW:
http://sine.ni.com/apps/we/niepd_web_display.display_epd4?p_guid=BCF19BC556AA1487E034080020E74861&p_node=DZ52511&p_source=External

There are also examples that are shipped with LabVIEW and the IMAQ driver to acquire and save images. They are located in the folder C:\Program Files\National Instruments\LabVIEW\examples\IMAQ .

Hope this helps-
Julie S
Applications Engineer
National Inst
ruments