Experimental Physics and
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| <== Date ==> | <== Thread ==> |
|---|
| Subject: | RE: Synchronization and saving frame rate |
| From: | Mark Rivers via Tech-talk <tech-talk at aps.anl.gov> |
| To: | "'Engbretson, Mark S.'" <engbretson at anl.gov> |
| Cc: | EPICS tech-talk <tech-talk at aps.anl.gov> |
| Date: | Mon, 4 May 2020 13:08:48 +0000 |
|
Ø
), would it be possible through the scatter plugin to send one frame with the total array to say a JPEG plugin to save directly images, and the other 9 with the
attributes I want to save and WITHOUT the image array to a HDF5 file to save these attributes? You cannot use the HDF5 plugin to save just attributes, and no NDArray. However, you can send the image through an ROI plugin that just exacts the first 2 pixels in X and
Y so it is a [2,2] NDArray. Then it won’t take up any significant space in the HDF5 file. Mark From: Tech-talk <tech-talk-bounces at aps.anl.gov> On Behalf Of
Engbretson, Mark S. via Tech-talk From: Matteo C. <matteo603 at hotmail.it>
Dear everyone, thank you for the numerous and useful answers. Probably Mr. Engbretson answer is the most suited for what I need: it allows to obtain directly what I need, i.e. 1 images for every 10 frames, even if it doesn't seem the cleanest way. I'll try
that. Now another question comes to my mind: since in the other 9 frames there is information I need (namely the average of the array), would it be possible through the scatter plugin to send one frame
with the total array to say a JPEG plugin to save directly images, and the other 9 with the attributes I want to save and WITHOUT the image array to a HDF5 file to save these attributes? Thank you again. Kind regards, Matteo Ciarchi Da: Engbretson, Mark S. <engbretson at anl.gov> Wouldn’t a quick-and-dirty way to fake this effect be by using the NDPluginScatter plugin to fan out those 10 images , only 1 of which actually generates a file and the other 10 just go to something like the nullfileplugin so that no file
is actually generated? From: Tech-talk <tech-talk-bounces at aps.anl.gov>
On Behalf Of Matteo C. via Tech-talk 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 |
- References:
- Synchronization and saving frame rate Matteo C. via Tech-talk
- FW: Synchronization and saving frame rate Engbretson, Mark S. via Tech-talk
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