Re: Bayer to RGB areaDetector

[Mark Rivers <rivers@cars.uchicago.edu>]

Hi Avinder,


What version of ADProsilica are you using?  The conversion from Bayer to RGB is handled in the ADProsilica driver (prosilica.cpp) using the pvAPI library.


There is a PV you need to set, $(P)$(R)BayerConvert.  It is in the lower-left of the medm prosilica.adl screen-shot in the documentation here:

http://cars9.uchicago.edu/software/epics/prosilicaDoc.html


You should set BayerConvert=RGB1.  Then the output images will be in RGB1 format which the ffmpeg plugin and viewer should handle fine.  Using Bayer mode with conversion in the driver like this is a good idea because it reduces the network bandwidth of the camera by a factor of 3.


This conversion from Bayer to RGB1 was moved from the ColorConvert plugin into the ADProsilica driver in R2-0 of ADProsilica (March, 2014) as documented here:


https://github.com/areaDetector/ADProsilica/blob/master/RELEASE.md


This conversion is also supported in the ADPointGrey driver.


Mark



________________________________
From: tech-talk-bounces@aps.anl.gov <tech-talk-bounces@aps.anl.gov> on behalf of arvinder.palaha@diamond.ac.uk <arvinder.palaha@diamond.ac.uk>
Sent: Thursday, May 3, 2018 10:37 AM
To: tech-talk
Subject: Bayer to RGB areaDetector

Dear tech-talk,

Using areaDetector, I have been trying to use the Bayer color mode with a Mako G507C camera at DLS, but to no avail.

When using either the Mono or RGB mode, I see an updated image on the ffmpegViewer screen, but not with Bayer mode.

I tried using the NDPluginColorConvert plugin; converting Bayer color mode to RGB1 (or even Mono) but this also causes the ffmpegViewer stream to stop.

Looking in the NDPluginColorConvert.cpp in ADCore/ADApp/pluginSrc, it depends on PVAPI to deal with debayering, and this was a library from Prosilica, which is a proprietary library, but not in ADCore anymore.

There is demosaicing function in OpenCV that can convert a bayer format to RGB.

My question is: could ADCore depend on OpenCV in order for the color convert plugin bayer feature to work?

If not, could we use the OpenCV method in a separate support module (we have one at DLS called adOpenCV)?



For info; I am using ADCore 2-6 and ffmpegServer 3-1


Cheers,


Arvinder Palaha
Beamline Control Systems
DH G.63
T: +44-(0)1235-77-8137
E: arvinder.palaha@diamond.ac.uk


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