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Since quick preview does only integer scaling, it may be
preferable to do slight upscaling when presenting the debayered
image rather than downscaling by almost 2x, so we can save some
resources.

Sebastian Krzyszkowiak authored Jun 12, 2021 and Sebastian Krzyszkowiak committed Jun 19, 2021

This prevents highlights from appearing pink.

Sebastian Krzyszkowiak authored Jun 12, 2021 and Sebastian Krzyszkowiak committed Jun 19, 2021

Color matrices are supposed to operate on linear values.

Sebastian Krzyszkowiak authored May 20, 2021 and Sebastian Krzyszkowiak committed May 20, 2021

Prevents value underflow and allows to extend the resulting
values back to full range, using a lookup table for faster calculation.

With some pixel formats it used the second green channel as
either red or blue.

Depending on lighting you might still need to adjust the gains

v4l2-ctl -d /dev/video0 -c analogue_gain=4000
v4l2-ctl -d /dev/video0 -c digital_gain=240
Signed-off-by: Angus Ainslie <angus@akkea.ca>

AngeloGioacchino Del Regno authored Oct 25, 2020 and Martijn Braam committed Oct 25, 2020

This application was supporting only debayering of BGGR8 streams:
this is an issue on cameras that are outputting a different format.

Implement quick-debayering of all Bayer 8-bits pixfmts in order to
solve wrong tint issues on many, many camera sensors.

This was tested on a Sony Exmor-RS IMX300 sensor.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>