Fresnel

QUOTE (Minh Pham @ Nov 23 2008, 09:43 PM) I realised on friday that I had it in a loop, hence why it kept asking me to select rectangle. Here is a screenshot of the front panel. I have selected a rectangular ROI. I would like to be able to place it on the block diagram and use this ROI area as my new image, but can't find a way of doing this just now.

I have an image of a spot on a CCD camera and it is a fairly stable image. I have a lot of background noise around the image I'd like to cut out. I can do this easily using an Intensity graph to work out what pixel values to ignore but I'd also like to only analyse a rectangular segment of my whole image, ie a rectangle around the spot. I have tried using IMAQ select rectangle but it just keeps constantly asking me to select a rectangle even after one is selected. Any ideas?

QUOTE (Fresnel @ Nov 4 2008, 11:38 AM) Here is a copy of the basics of my setup as a VI. I'd be looking to add to this a part that calculates the allan variance.

QUOTE (Akker@Vision @ Nov 1 2008, 09:22 PM) I realise that taking a snapshot regularly over a given time would be very complicated, therefore I'd like to take a snapshot of an image and analyse it (as my program currently does) but when the image is captured, start a timer which runs for a given period of time before capturing a new image and analysing that.

QUOTE (Neville D @ Oct 30 2008, 04:03 PM) The CCD camera is continually measuring an image from a laser. When I hit the 'stop' button on my program, the current image is then analysed. I would like to let the CCD image run for say ~100s and to get an average set of results over that given time period.

Hi, I have wrote a program that can take an input image (from a CCD camera) and I can perform analysis on this image no problem. However, the image is only a 'snapshot'. I'd like to be able to take an average over a set time which I have control over. Any clues would be much appreciated.