HBCan

zimmie said:

HBCan said:

Bayer... as in Bayer filter.  An RGB pattern filter over the camera's sensor.  One color filter per pixel... Red, Green, or Blue.  The image colour data is captured and interpolated for the neighbouring pixels to produce a full colour image.  Virtually all commercial colour sensors employ a Bayer filter solution otherwise you would require three sensors to be used... one per colour.  Not easily implemented in such compact environments as a beam splitting prism would be required too.  Creator of the Bayer filter.... Bryce Bayer... who worked with Eastman Kodak.  Died in 2012 I believe. 

Sure, but the Bayer pattern is naturally a tiled series of squares with two green, one red, one blue photosite per four pixels. Lines up nicely with Pentile display subpixel arrangements. So what in the world is "Quad Bayer"?

Did a little research, and it turns out it's a Sony variant of the normal Bayer pattern. They turn each photosite into four separate, smaller photosites, then average their values as a way of reducing amplification noise. Thus, the "50 megapixels" is a lie. It has 50 million photosites, but they operate in clusters of four, producing one output pixel value which is still only one channel. It's the equivalent of a 12.5 megapixel sensor.

Still no idea what Octa PD is supposed to be.