From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To: "Krzysztof Hałasa" <khalasa@piap.pl>
Cc: Jacopo Mondi <jacopo@jmondi.org>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Sakari Ailus <sakari.ailus@iki.fi>,
linux-media@vger.kernel.org
Subject: Re: [PATCH 02/10] media: ar0521: Add V4L2_CID_ANALOG_GAIN
Date: Fri, 7 Oct 2022 15:11:59 +0300 [thread overview]
Message-ID: <Y0AXj32rub14CDWY@pendragon.ideasonboard.com> (raw)
In-Reply-To: <m3wn9b4zl0.fsf@t19.piap.pl>
On Fri, Oct 07, 2022 at 01:56:11PM +0200, Krzysztof Hałasa wrote:
> Jacopo Mondi writes:
>
> >> BTW ISP can't really do that color balancing for you, since the sensor
> >> operates at its native bit resolution and ISP is limited to the output
> >> format, which is currently only 8-bit.
> >
> > I'm not sure what do you mean here either :)
>
> Well, the sensor does DSP on 12 bits internally, or something alike.
> Then it outputs (currently) 8 bits of data, the rest being lost. If you
> do color balancing etc. on this, you may get worse results (like color
> banding).
But if you apply colour gains in the sensor, they will apply before
black level correction or lens shading compensation in the ISP, which I
think will cause other issues, possibly worse.
Out of curiosity, if you can tell, what do you use this sensor with ?
--
Regards,
Laurent Pinchart
next prev parent reply other threads:[~2022-10-07 12:12 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-05 19:06 [PATCH 00/10] media: ar0521: Add analog gain, rework clock tree Jacopo Mondi
2022-10-05 19:06 ` [PATCH 01/10] media: ar0521: Implement enum_frame_sizes Jacopo Mondi
2022-10-06 14:37 ` Dave Stevenson
2022-10-06 16:33 ` Laurent Pinchart
2022-10-07 4:57 ` Krzysztof Hałasa
2022-10-07 8:08 ` Laurent Pinchart
2022-10-07 7:29 ` Jacopo Mondi
2022-10-07 8:11 ` Laurent Pinchart
2022-10-07 10:32 ` Dave Stevenson
2022-10-07 12:05 ` Sakari Ailus
2022-10-07 12:12 ` Laurent Pinchart
2022-10-05 19:06 ` [PATCH 02/10] media: ar0521: Add V4L2_CID_ANALOG_GAIN Jacopo Mondi
2022-10-06 14:44 ` Dave Stevenson
2022-10-06 15:00 ` Jacopo Mondi
2022-10-06 15:05 ` Laurent Pinchart
2022-10-07 5:28 ` Krzysztof Hałasa
2022-10-07 8:20 ` Laurent Pinchart
2022-10-12 18:54 ` Sakari Ailus
2022-10-13 9:30 ` Laurent Pinchart
2022-10-07 5:20 ` Krzysztof Hałasa
2022-10-07 7:17 ` Jacopo Mondi
2022-10-07 8:30 ` Laurent Pinchart
2022-10-07 12:01 ` Krzysztof Hałasa
2022-10-07 12:07 ` Laurent Pinchart
2022-10-07 14:02 ` Krzysztof Hałasa
2022-10-17 15:10 ` Jacopo Mondi
2022-10-17 15:57 ` Sakari Ailus
2022-10-17 16:31 ` Jacopo Mondi
2022-10-17 16:37 ` Sakari Ailus
2022-10-17 16:42 ` Dave Stevenson
2022-10-07 11:56 ` Krzysztof Hałasa
2022-10-07 12:11 ` Laurent Pinchart [this message]
2022-10-07 14:00 ` Krzysztof Hałasa
2022-10-05 19:06 ` [PATCH 03/10] media: ar0521: Set maximum resolution to 2592x1944 Jacopo Mondi
2022-10-06 14:57 ` Dave Stevenson
2022-10-07 13:06 ` Laurent Pinchart
2022-10-20 11:23 ` Jacopo Mondi
2022-10-07 5:33 ` Krzysztof Hałasa
2022-10-07 12:42 ` Jacopo Mondi
2022-10-07 14:07 ` Krzysztof Hałasa
2022-10-05 19:06 ` [PATCH 04/10] media: ar0521: Rework PLL computation Jacopo Mondi
2022-10-07 13:56 ` Laurent Pinchart
2022-10-12 19:02 ` Sakari Ailus
2022-10-13 9:31 ` Laurent Pinchart
2022-10-05 19:06 ` [PATCH 05/10] media: ar0521: Add LINK_FREQ control Jacopo Mondi
2022-10-06 15:10 ` Dave Stevenson
2022-10-07 14:01 ` Laurent Pinchart
2022-10-07 14:26 ` Dave Stevenson
2022-10-16 1:53 ` Laurent Pinchart
2022-10-17 11:21 ` Dave Stevenson
2022-10-17 9:24 ` Jacopo Mondi
2022-10-17 11:00 ` Dave Stevenson
2022-10-17 12:00 ` Jacopo Mondi
2022-10-05 19:06 ` [PATCH 06/10] media: ar0521: Configure pixel rate using LINK_FREQ Jacopo Mondi
2022-10-06 5:51 ` kernel test robot
2022-10-06 15:42 ` Sakari Ailus
2022-10-07 7:25 ` Jacopo Mondi
2022-10-07 5:52 ` Krzysztof Hałasa
2022-10-05 19:06 ` [PATCH 07/10] media: ar0521: Adjust exposure and blankings limits Jacopo Mondi
2022-10-06 2:08 ` kernel test robot
2022-10-06 4:17 ` kernel test robot
2022-10-06 15:41 ` Dave Stevenson
2022-10-05 19:06 ` [PATCH 08/10] media: ar0521: Setup controls at s_stream time Jacopo Mondi
2022-10-06 15:43 ` Dave Stevenson
2022-10-07 7:23 ` Jacopo Mondi
2022-10-05 19:06 ` [PATCH 09/10] media: ar0521: Rework startup sequence Jacopo Mondi
2022-10-06 15:45 ` Dave Stevenson
2022-10-05 19:06 ` [PATCH 10/10] media: ar0521: Tab-align definitions Jacopo Mondi
2022-10-06 15:48 ` Dave Stevenson
2022-10-06 16:11 ` Laurent Pinchart
2022-10-07 5:42 ` Krzysztof Hałasa
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