Bayer rg 8-bit - how many bits per pixel am I looking at?

I'm streaming video with IMAQdx from a GigE Vision camera that does Bayer 8-bit RG, among other formats. I appear to be receiveing 24 bpp from the video stream, though. Does LabView do any conversions on this data that would ramp the size up without me knowing? Or is my camera doing it?

IMAQdx will generally do some conversion on the various pixel formats sent by the camera to get them into a proper format for a Vision image datatype. For some pixel formats, this may mean swapping endianness, unpacking bits, or shifting the data around.
For a BayerRG8 format, the camera is sending a 8-bit mono image and the driver is going to (by default) automatically do the Bayer conversion to a color image. Other cameras might expose a pixel format directly of an RGB or YUV format, in which case it is the camera itself doing the bayer conversion before sending it to IMAQdx.
In this case, you could disable IMAQdx's Bayer decoding (turn the bayer decoding attribute to "Off" rather than "Auto") and get the raw 8-bit mono image if you want. Usually the monochrome image is fairly useless since it has the bayer pattern applied. Some cameras might have a monochrome mode available where they will internally debayer the image, then convert it back to monochrome so that the bayer filter is effectively removed.
What is your objective you are trying to do here?
Eric

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