BlueROV2 default camera parameters

[PavanM (Pavan)]

Hi, I’m looking for intrinsic camera parameters, focal lengths and optical centers for the default BlueROV2 camera as needed by openCV applications. More info on these parameters : OpenCV: Camera Calibration
Are these parameter values already available with anyone? I guess these values will differ from air operation to underwater operation.

Thank you!

[jwalser (Jacob)]

Hi @PavanM, we don’t have these values. Please follow up if you do sort them yourself.

[Nathan_R07]

Hi,
Looking for the same kind of information here like the camera K matrix and distortion coefs Are there any news ?

I’m starting a photogrammetry project and trying to figure out camera calibration.

Does the K matrix change wether you’re using it in the air or water ?
Is it unique to every camera or do the same model have the same parameters ?
Thank you

[EliotBR (Eliot)]

Hi @Nathan_R07,

@EliotBR

Camera calibration to determine the intrinsic and distortion parameters is unfortunately unique to individual cameras, and will also depend on the lens focus/zoom you were using at the time, as well as some additional light refraction that depends on the salinity and temperature of the water you were operating in. Calibration for the extrinsic parameters is completely situation-dependent (it involves the things being imaged), and likely isn’t what you’re asking about.

If it’s helpful, there’s an example of some parameters later in that thread that may be useful as a starting point, but if you want calibrated cameras then you’ll need to run a calibration on the exact camera you’re using, while it’s in the intended operating environment.