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[TG] [TG11] M232 Grainy Picture - Printable Version

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[TG11] M232 Grainy Picture - Robinsonh2o - 10-27-18 11:05 AM

I purchased the FLIR M232 thermal camera when it was originally released. I have never been very thrilled with the quality of the picture and at times the picture becomes extremely grainy and almost unusable (see attachment). At other times there is very little contrast and you can’t discern the horizon or other objects. The camera has the original software when it was released. It is networked through an HS5 to two axiom 12s and one axiom 7 which have the software that was released in July. The picture looks the same on all MFDs. Anything I can do to improve the picture?

RE: [TG11] M232 Grainy Picture - Tom - Raymarine - Moderator - 10-28-18 11:46 PM

Hello Robinsonh2o,

That looks and sounds like your camera isn't correctly performing its Non-Uniformity Correction / Flat Field Correction (NUC / FFC, the names are used interchangeably: NUC describes the objective, FFC how this is performed.) All of our marine thermal cameras do this periodically in order to zero out slight differences in the response of the individual pixels of the microbolometer detector. You'll see this as a slight pause (1-2s) in the image every few minutes as the camera flips a black-body shutter in front of the detector inside the camera and recalibrates the output of all of the pixels. If the NUC doesn't happen then the quality of the image will gradually degrade over time, until the camera is power-cycled.

There was a problem in early M232 software where the NUC could be set to occur manually rather than automatically (manual NUCs are used by some professional users, all normal users want Auto.) The solution is to update the M232's software and then perform a factory reset on it, which sets the NUC setting back to Auto.

The M232 software upgrade is a dealer/service-centre level process, so I would start by contacting the dealer who supplied the camera or your nearest Raymarine service centre about getting this updated. The latest software for M232 today is v2.07 (the webpage says 2.05, it looks like that's a little outdated. v2.07 is what you need.)


RE: [TG11] M232 Grainy Picture - Robinsonh2o - 07-23-19 10:49 AM

I recently had a raymarine technician come out to update the software. He wasn’t too confident that the problem would be fixed since he’d seen the issue before and ending up having to replace the unit in order to resolve the issue. Unfortunately it doesn’t appear the update fixed my issue (see attachment). Is there anything else I can troubleshoot or should I coordinate a return of the unit?

Thanks in advance.

RE: [TG11] M232 Grainy Picture - Tom - Raymarine - Moderator - 07-24-19 02:13 AM

Hello Robinsonh2o,

Did the tech who did the software upgrade also do the factory reset? This is necessary, otherwise the camera will still be set to manual FFC. If your dealer didn't do the reset then this would explain why neither of the cameras they've worked on have been fixed by the upgrade!

The reset can be performed either through the camera's web-browser interface on a computer, or now through Menu > Settings > Camera Setup > Restore Factory Settings through the new v3.10 software for your Axiom MFDs.

If this doesn't solve the problem then the camera will indeed need to be looked at, but I think it will. It has in every case I have seen or heard of.