Experimental Physics and
Industrial Control System

Mark Rivers via Tech-talk <tech-talk at aps.anl.gov> · Wed, 29 Apr 2020 14:39:00 +0000

Hi Matteo,

I cannot tell you how to do this for the Picoscope, but for the areaDetector camera you can do the following:

- Set the NDPluginProcess to get its data from the camera.
- Enable the Process plugin and set the recursive filter to Average, Auto reset=Yes, N filter=10,  Filter callbacks "Array N only", as shown in the attached screen shot.
- Set your file plugin to get its data from the process plugin.

Now you will be saving the average of every 10 frames. There is not really a way to set it to do the averaging for 1 second rather than N frames.  You could approximate that logic by having a calc record compute N from the current camera frame rate.

Mark

________________________________
From: Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of Matteo C. via Tech-talk <tech-talk at aps.anl.gov>
Sent: Wednesday, April 29, 2020 9:20 AM
To: tech-talk
Subject: Synchronization and saving frame rate

Hi everyone,
hope you are all safe and sound.
I need some help to solve a synchronization problem using Areadetector and its Plug-ins.
We would need to get different pieces of data from a camera and a Picoscope (Oscilloscope). The idea is to get data from the Picoscope and the average of the image at a certain rate, and the image itself at a 10th of this rate. I was wondering if there's an option to save via JPEG or HDF5 (which take care also of the time synchronization of the two) at different rates than the rate acquisition of the StdArray: for example if the frame rates of the camera and the Picoscope are at 10frames/s (we want an image for every second, and we want 10 sample of picoscope/average image per image), the image is saved every second and the picoscope/average of image 10 times per second. The reason is that we do not need that many images but mainly we are interested in the Picoscope and image average and we want to save some space.
Thank you,

Kind regards,
Matteo Ciarchi

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System