[Docmentation] How to find out the Bayer pattern from the CFA layout

[astrorafael]

[Docmentation] How to find out the Bayer pattern from the CFA layout

[6by9]

It is contradictory.
If it is BGGR, then the layout would be

BGBGBGBGBGBGBG
GRGRGRGRGRGRGR

The layout illustrated would be GBRG.

As noted just after that,

# Please note that if you use vflip or hflip to change the orientation
# of the capture, you must flip the Bayer pattern accordingly

so you need to know which sensor you are dealing with, and the flips in effect in order to be able to know the Bayer order.

Or you can look at offset 268 (if I've counted correctly) into the header which contains the Bayer order:
0 - RGGB
1 - GBRG
2 - BGGR
3 - GRBG
dcraw uses this header to get the order - https://github.com/6by9/dcraw/blob/master/dcraw.c#L6466

[astrorafael]

Ok, so this is a typo in the example CFA layout in the documentation. Good to know. Should be trivial to fix it quickly.

I have also downloaded the OV 5647 datasheet and on page 25, figure 3-1 shows the chip CFA pattern with the BG/GR patterns as expected,