V4L2_PIX_FMT_GREY — Grey-scale image
This is a grey-scale image. It is really a degenerate Y'CbCr format which simply contains no Cb or Cr data.
Example 2.10. V4L2_PIX_FMT_GREY 4 × 4
pixel image
Byte Order. Each cell is one byte.
| start + 0: | Y'00 | Y'01 | Y'02 | Y'03 |
| start + 4: | Y'10 | Y'11 | Y'12 | Y'13 |
| start + 8: | Y'20 | Y'21 | Y'22 | Y'23 |
| start + 12: | Y'30 | Y'31 | Y'32 | Y'33 |