Unfortunately written by someone who neither understands resolution nor aliasing. I'm getting tired now of such articles that lacks even the most basic of technical fact checking.
" Also when you use a Bayer pattern and you de-bayer in the end your looking at approx half of the true resolution you started with. Maybe its Red’s goal to double up to 8K so in the end you have a true 4K output to work with? The only problem with that is that if you increase resolution you also increase moire opportunity. Due to that they end up putting in a stronger filter (low pass filter) on the sensor that basically softens the image. Its a never ending battle. Its best to just avoid Bayer all together which I think is what most companies are focusing on. Canon C500, Sony F65 both do not use a standard Bayer pattern and therefore can retain their native resolution. The Arri Alexa starts with a 3.5K sensor knowing that the De-Bayer will yield a nice 2K/1080P output. 4K versions of cameras coming out will have a goal of Bayer free 4K output with a 1080p output option.
1) Alexa isn't 3.5k starting point, it's 2880 across for making 1080p. (just as the F65 isn't 20mp it's 17.7mp)
2) 1) above contradicts his claim that you need 2x the resolution on a Bayer pattern (2280/1920 = 1.5)
3) debayering actually has minimal effect on measured resolution, much less than the optical low pass filter to avoid the worst of aliasing, and for example on Epic / MX I've measured about 80% of the linear resolution of the sensor, a figure in excess of his 50% figure which is woefully inaccurate. And OLPFs are necessary for all camera types, be they a colour filter array like Bayer, or 3chip or Foveon.
4) increasing sensor resolution makes moire and aliasing harder, not easier! The better the camera is at responding to fine detail, the better it will be able to avoid aliasing in a scene.
5) No, we didn't put in a stronger OLPF. Higher resolution without changing pixel size means the OLPF remains constant. Higher resolution while making the pixels smaller means weaker OLPF is needed, not stronger.
6) no, it's not a never-ending battle.
7) C500 is utterly standard bayer pattern.
8) F65 is utterly standard bayer rotated by 45 degrees, and for an 8k camera has only a fraction of the pixels it needs as it only has enough for about 5.6k not 8k.