[libcamera-devel] [PATCH v2] ipa: raspberrypi: imx296: Minor tuning updates
Naushir Patuck
naush at raspberrypi.com
Wed Mar 1 11:40:34 CET 2023
Hi David,
Thanks for the update!
On Wed, 1 Mar 2023 at 10:28, David Plowman via libcamera-devel
<libcamera-devel at lists.libcamera.org> wrote:
>
> Some updates to the tuning for the imx296 sensors.
>
> For the colour variant:
>
> * Minor change to the AWB curve, making things a little less green.
> * Updated CCMs that reduce colour saturation to a more accurate level.
> Thanks to Dr. Rolf Henkel for these measurements and calculations.
> * Sharpening has been toned down quite a lot.
> * rpi.focus algorithm added so that the focus measure can be accessed.
>
> The sharpening and focus changes are applied to the mono version of
> the sensor too as we expect similar characteristics.
>
> Signed-off-by: David Plowman <david.plowman at raspberrypi.com>
Reviewed-by: Naushir Patuck <naush at raspberrypi.com>
> ---
> src/ipa/raspberrypi/data/imx296.json | 180 ++++++++++++++++++----
> src/ipa/raspberrypi/data/imx296_mono.json | 12 +-
> 2 files changed, 158 insertions(+), 34 deletions(-)
>
> diff --git a/src/ipa/raspberrypi/data/imx296.json b/src/ipa/raspberrypi/data/imx296.json
> index 4e830517..346f5b65 100644
> --- a/src/ipa/raspberrypi/data/imx296.json
> +++ b/src/ipa/raspberrypi/data/imx296.json
> @@ -78,7 +78,7 @@
> "auto":
> {
> "lo": 2500,
> - "hi": 8000
> + "hi": 7600
> },
> "incandescent":
> {
> @@ -108,7 +108,7 @@
> "cloudy":
> {
> "lo": 7000,
> - "hi": 8600
> + "hi": 7600
> }
> },
> "bayes": 1,
> @@ -122,8 +122,8 @@
> 5600.0, 0.2948, 0.6124,
> 7400.0, 0.2336, 0.6894
> ],
> - "sensitivity_r": 1.0,
> - "sensitivity_b": 1.0,
> + "sensitivity_r": 1.05,
> + "sensitivity_b": 1.05,
> "transverse_pos": 0.03093,
> "transverse_neg": 0.02374
> }
> @@ -352,73 +352,189 @@
> {
> "ccms": [
> {
> - "ct": 2500,
> + "ct": 2000,
> "ccm":
> [
> - 1.73697, -0.36758, -0.36939,
> - -0.46469, 1.75868, -0.29399,
> - 0.14353, -1.26221, 2.11867
> + 1.48716, -0.1877, -0.35079,
> + -0.48577, 1.55088, -0.03387,
> + 0.24919, -1.4583, 2.12083
> + ]
> + },
> + {
> + "ct": 2200,
> + "ccm":
> + [
> + 1.53439, -0.28852, -0.29392,
> + -0.44748, 1.56295, -0.08907,
> + 0.23529, -1.30488, 1.99784
> + ]
> + },
> + {
> + "ct": 2400,
> + "ccm":
> + [
> + 1.57619, -0.36904, -0.25181,
> + -0.41654, 1.57046, -0.13192,
> + 0.21678, -1.18352, 1.90786
> + ]
> + },
> + {
> + "ct": 2600,
> + "ccm":
> + [
> + 1.61348, -0.43497, -0.2198,
> + -0.39075, 1.5753, -0.1665,
> + 0.19789, -1.08592, 1.83942
> ]
> },
> {
> "ct": 2800,
> "ccm":
> [
> - 1.77684, -0.48089, -0.29595,
> - -0.41669, 1.74344, -0.32675,
> - 0.11995, -1.10172, 1.98177
> + 1.64717, -0.49009, -0.1951,
> + -0.36881, 1.57852, -0.1952,
> + 0.18016, -1.00609, 1.78575
> + ]
> + },
> + {
> + "ct": 3000,
> + "ccm":
> + [
> + 1.67798, -0.53693, -0.17591,
> + -0.34986, 1.58074, -0.21955,
> + 0.16406, -0.9398, 1.74261
> + ]
> + },
> + {
> + "ct": 3200,
> + "ccm":
> + [
> + 1.70647, -0.5773, -0.161,
> + -0.33332, 1.58235, -0.24056,
> + 0.14961, -0.88398, 1.70721
> + ]
> + },
> + {
> + "ct": 3400,
> + "ccm":
> + [
> + 1.73305, -0.61248, -0.14951,
> + -0.31875, 1.58355, -0.25894,
> + 0.13671, -0.83642, 1.67769
> + ]
> + },
> + {
> + "ct": 3600,
> + "ccm":
> + [
> + 1.75802, -0.64343, -0.14077,
> + -0.30581, 1.5845, -0.27518,
> + 0.12518, -0.79546, 1.65271
> ]
> },
> {
> - "ct": 2900,
> + "ct": 4100,
> "ccm":
> [
> - 1.83447, -0.50694, -0.32754,
> - -0.44924, 1.86236, -0.41312,
> - 0.06159, -0.91231, 1.85071
> + 1.78116, -0.67459, -0.13048,
> + -0.26859, 1.58692, -0.31929,
> + 0.11915, -0.77931, 1.64012
> ]
> },
> {
> - "ct": 3620,
> + "ct": 4600,
> "ccm":
> [
> - 1.91315, -0.61463, -0.29852,
> - -0.38782, 1.80483, -0.41701,
> - 0.00632, -0.74309, 1.73678
> + 1.83867, -0.73605, -0.12044,
> + -0.24947, 1.58699, -0.34207,
> + 0.09949, -0.71041, 1.59842
> ]
> },
> {
> - "ct": 4560,
> + "ct": 5100,
> "ccm":
> [
> - 2.13144, -0.79703, -0.33441,
> - -0.41488, 2.10864, -0.69376,
> - -0.03975, -0.70785, 1.74761
> + 1.88967, -0.78455, -0.11744,
> + -0.23398, 1.58806, -0.36172,
> + 0.08362, -0.6574, 1.56728
> ]
> },
> {
> "ct": 5600,
> "ccm":
> [
> - 1.95828, -0.76779, -0.19049,
> - -0.26299, 1.70577, -0.44278,
> - -0.05451, -0.51918, 1.57369
> + 1.93485, -0.82318, -0.1191,
> + -0.22108, 1.58973, -0.37892,
> + 0.07074, -0.61609, 1.54362
> + ]
> + },
> + {
> + "ct": 6100,
> + "ccm":
> + [
> + 1.97481, -0.85423, -0.12371,
> + -0.21015, 1.59169, -0.39406,
> + 0.06021, -0.58353, 1.52536
> + ]
> + },
> + {
> + "ct": 6600,
> + "ccm":
> + [
> + 2.01029, -0.87946, -0.13017,
> + -0.20074, 1.59378, -0.4075,
> + 0.05146, -0.55732, 1.51096
> + ]
> + },
> + {
> + "ct": 7100,
> + "ccm":
> + [
> + 2.04183, -0.9002, -0.13765,
> + -0.19255, 1.59586, -0.41944,
> + 0.04414, -0.53603, 1.49947
> + ]
> + },
> + {
> + "ct": 7600,
> + "ccm":
> + [
> + 2.07001, -0.91744, -0.14566,
> + -0.18534, 1.59788, -0.43013,
> + 0.03791, -0.51841, 1.49013
> + ]
> + },
> + {
> + "ct": 8100,
> + "ccm":
> + [
> + 2.09534, -0.93195, -0.15388,
> + -0.17893, 1.59981, -0.43974,
> + 0.03256, -0.50364, 1.48243
> ]
> },
> {
> - "ct": 7400,
> + "ct": 8600,
> "ccm":
> [
> - 2.14829, -0.65425, -0.49405,
> - -0.46729, 2.66571, -1.19841,
> - -0.28128, -0.56248, 1.84377
> + 2.11799, -0.94416, -0.16203,
> + -0.17324, 1.60161, -0.44836,
> + 0.02795, -0.4912, 1.47604
> ]
> }
> ]
> }
> },
> {
> - "rpi.sharpen": { }
> + "rpi.sharpen":
> + {
> + "threshold": 0.1,
> + "strength": 1.0,
> + "limit": 0.18
> + }
> + },
> + {
> + "rpi.focus": { }
> }
> ]
> -}
> \ No newline at end of file
> +}
> diff --git a/src/ipa/raspberrypi/data/imx296_mono.json b/src/ipa/raspberrypi/data/imx296_mono.json
> index b68b11db..e9fa30c6 100644
> --- a/src/ipa/raspberrypi/data/imx296_mono.json
> +++ b/src/ipa/raspberrypi/data/imx296_mono.json
> @@ -222,7 +222,15 @@
> }
> },
> {
> - "rpi.sharpen": { }
> + "rpi.sharpen":
> + {
> + "threshold": 0.1,
> + "strength": 1.0,
> + "limit": 0.18
> + }
> + },
> + {
> + "rpi.focus": { }
> }
> ]
> -}
> \ No newline at end of file
> +}
> --
> 2.30.2
>
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