[PATCH v3 21/23] libtuning: lsc: rkisp1: Do not calculate ratios to green
Paul Elder
paul.elder at ideasonboard.com
Fri Jul 5 08:28:13 CEST 2024
On Wed, Jul 03, 2024 at 04:17:10PM +0200, Stefan Klug wrote:
> The current LSC algorithm for the rkisp1 just forwards the LSC tables to
> the hardware, so absolute factors are needed and not ratios compared to
> green. Therefore every channel needs to be calculated independently.
>
> Signed-off-by: Stefan Klug <stefan.klug at ideasonboard.com>
With Laurent's comments addressed,
Reviewed-by: Paul Elder <paul.elder at ideasonboard.com>
> ---
> utils/tuning/libtuning/modules/lsc/rkisp1.py | 8 ++++++--
> 1 file changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/utils/tuning/libtuning/modules/lsc/rkisp1.py b/utils/tuning/libtuning/modules/lsc/rkisp1.py
> index 512233aeae9d..56df23ec7b42 100644
> --- a/utils/tuning/libtuning/modules/lsc/rkisp1.py
> +++ b/utils/tuning/libtuning/modules/lsc/rkisp1.py
> @@ -38,8 +38,12 @@ class LSCRkISP1(LSC):
>
> # \todo Should these ratio against the average of both greens or just
> # each green like we've done here?
> - cr, _ = self._lsc_single_channel(image.channels[lt.Color.R], image, gr)
> - cb, _ = self._lsc_single_channel(image.channels[lt.Color.B], image, gb)
> +
> + # The LSC tables in the our rkisp1 algorithm represent gains on the
> + # corresponding channel, not ratios with respect to green, so calculate
> + # them independently
> + cr, _ = self._lsc_single_channel(image.channels[lt.Color.R], image, None)
> + cb, _ = self._lsc_single_channel(image.channels[lt.Color.B], image, None)
>
> return image.color, cr.flatten(), cb.flatten(), cgr.flatten(), cgb.flatten()
>
> --
> 2.43.0
>
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