[libcamera-devel] [PATCH 1/1] ipa: raspberrypi: Update imx296 tuning file
Laurent Pinchart
laurent.pinchart at ideasonboard.com
Fri Jul 15 02:14:24 CEST 2022
Hi William,
Thank you for the patch.
On Thu, Jul 14, 2022 at 10:41:43AM +0100, William Vinnicombe via libcamera-devel wrote:
> From: William Vinnicombe <william.vinnicombe at raspberrypi.com>
>
> The previous tuning values for the imx296 are not accurate, and do not
> contain awb parameters.
There was a reason for that though, the file was meant for the
monochrome version of the sensor. See [1] for the full context. I'm
actually aware of one user of this tuning file with a monochrome sensor,
and this patch will break this use case.
This brings nack the question that we decided to leave unanswered when
the imx296.json file was merged: how do we deal with different modules
that integrated the same camera sensor ?
[1] https://lists.libcamera.org/pipermail/libcamera-devel/2022-January/028756.html
> Update the tuning file using the raspberrypi ctt tool to give accurate
> values, and all required parameters.
>
> Signed-off-by: William Vinnicombe <william.vinnicombe at raspberrypi.com>
> ---
> src/ipa/raspberrypi/data/imx296.json | 268 ++++++++++++++++++++++-----
> 1 file changed, 217 insertions(+), 51 deletions(-)
>
> diff --git a/src/ipa/raspberrypi/data/imx296.json b/src/ipa/raspberrypi/data/imx296.json
> index 837feff5..4d9d0e8b 100644
> --- a/src/ipa/raspberrypi/data/imx296.json
> +++ b/src/ipa/raspberrypi/data/imx296.json
> @@ -8,25 +8,97 @@
> },
> "rpi.lux":
> {
> - "reference_shutter_speed": 19184,
> - "reference_gain": 1.0,
> + "reference_shutter_speed": 17895,
> + "reference_gain": 1.99,
> "reference_aperture": 1.0,
> - "reference_lux": 432,
> - "reference_Y": 13773
> + "reference_lux": 1147,
> + "reference_Y": 13348
> },
> "rpi.noise":
> {
> - "reference_constant": 0,
> - "reference_slope": 2.957
> + "reference_constant": 1,
> + "reference_slope": 2.631
> },
> "rpi.geq":
> {
> - "offset": 185,
> - "slope": 0.0105
> + "offset": 182,
> + "slope": 0.0127
> },
> "rpi.sdn":
> {
> },
> + "rpi.awb":
> + {
> + "priors":
> + [
> + {
> + "lux": 0, "prior":
> + [
> + 2000, 1.0, 3000, 0.0, 13000, 0.0
> + ]
> + },
> + {
> + "lux": 800, "prior":
> + [
> + 2000, 0.0, 6000, 2.0, 13000, 2.0
> + ]
> + },
> + {
> + "lux": 1500, "prior":
> + [
> + 2000, 0.0, 4000, 1.0, 6000, 6.0, 6500, 7.0, 7000, 1.0, 13000, 1.0
> + ]
> + }
> + ],
> + "modes":
> + {
> + "auto":
> + {
> + "lo": 2500,
> + "hi": 8000
> + },
> + "incandescent":
> + {
> + "lo": 2500,
> + "hi": 3000
> + },
> + "tungsten":
> + {
> + "lo": 3000,
> + "hi": 3500
> + },
> + "fluorescent":
> + {
> + "lo": 4000,
> + "hi": 4700
> + },
> + "indoor":
> + {
> + "lo": 3000,
> + "hi": 5000
> + },
> + "daylight":
> + {
> + "lo": 5500,
> + "hi": 6500
> + },
> + "cloudy":
> + {
> + "lo": 7000,
> + "hi": 8600
> + }
> + },
> + "bayes": 1,
> + "ct_curve":
> + [
> + 2861.0, 0.4281, 0.2614, 2915.0, 0.4266, 0.2639, 2916.0, 0.4112, 0.2913, 2934.0, 0.4099, 0.2935, 3626.0, 0.3604, 0.3777, 4617.0,
> + 0.2776, 0.5093, 5674.0, 0.2567, 0.5409, 7617.0, 0.1789, 0.6527
> + ],
> + "sensitivity_r": 1.0,
> + "sensitivity_b": 1.0,
> + "transverse_pos": 0.02994,
> + "transverse_neg": 0.04332
> + },
> "rpi.agc":
> {
> "metering_modes":
> @@ -113,65 +185,99 @@
> "rpi.alsc":
> {
> "omega": 1.3,
> - "n_iter": 0,
> + "n_iter": 100,
> "luminance_strength": 0.5,
> "calibrations_Cr":
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> + 1.049, 1.053, 1.054, 1.055, 1.052, 1.049, 1.045, 1.043, 1.044, 1.047, 1.047, 1.046, 1.047, 1.044, 1.039, 1.035,
> + 1.045, 1.048, 1.049, 1.053, 1.047, 1.045, 1.041, 1.039, 1.041, 1.042, 1.042, 1.042, 1.041, 1.038, 1.033, 1.028,
> + 1.032, 1.045, 1.047, 1.047, 1.042, 1.039, 1.036, 1.035, 1.036, 1.037, 1.039, 1.039, 1.039, 1.034, 1.028, 1.021,
> + 1.022, 1.031, 1.038, 1.038, 1.035, 1.034, 1.033, 1.032, 1.031, 1.031, 1.037, 1.038, 1.041, 1.033, 1.021, 1.013,
> + 1.012, 1.021, 1.025, 1.027, 1.027, 1.028, 1.028, 1.027, 1.025, 1.024, 1.024, 1.029, 1.038, 1.028, 1.012, 1.004,
> + 1.011, 1.012, 1.017, 1.021, 1.021, 1.022, 1.021, 1.021, 1.021, 1.019, 1.017, 1.023, 1.028, 1.013, 1.004, 1.001
> ],
> - "sigma": 0.005,
> - "sigma_Cb": 0.005
> + "sigma": 0.00063,
> + "sigma_Cb": 0.00089
> },
> "rpi.contrast":
> {
> @@ -185,6 +291,66 @@
> 65535, 65535
> ]
> },
> + "rpi.ccm":
> + {
> + "ccms":
> + [
> + {
> + "ct": 2861, "ccm":
> + [
> + 1.61339, -0.55137, -0.06202, -0.24235, 1.42738, -0.18503, 0.07817, -0.77121, 1.69304
> + ]
> + },
> + {
> + "ct": 2915, "ccm":
> + [
> + 1.64366, -0.57014, -0.07352, -0.27249, 1.48118, -0.20869, 0.08973, -0.78375, 1.69402
> + ]
> + },
> + {
> + "ct": 2916, "ccm":
> + [
> + 1.59805, -0.49622, -0.10183, -0.17981, 1.25627, -0.07646, -0.00104, -0.62299, 1.62404
> + ]
> + },
> + {
> + "ct": 2922, "ccm":
> + [
> + 1.61099, -0.52067, -0.09032, -0.19271, 1.28084, -0.08813, 0.01453, -0.65247, 1.63794
> + ]
> + },
> + {
> + "ct": 2934, "ccm":
> + [
> + 1.60849, -0.51603, -0.09246, -0.19148, 1.28129, -0.08981, 0.01142, -0.64365, 1.63224
> + ]
> + },
> + {
> + "ct": 3626, "ccm":
> + [
> + 1.62525, -0.59206, -0.03319, -0.20241, 1.42135, -0.21895, 0.05845, -0.66941, 1.61096
> + ]
> + },
> + {
> + "ct": 4617, "ccm":
> + [
> + 1.62324, -0.66976, 0.04652, -0.16629, 1.56915, -0.40287, 0.07878, -0.73116, 1.65238
> + ]
> + },
> + {
> + "ct": 5674, "ccm":
> + [
> + 1.66733, -0.68927, 0.02194, -0.13995, 1.47994, -0.33998, 0.04474, -0.61721, 1.57247
> + ]
> + },
> + {
> + "ct": 7617, "ccm":
> + [
> + 1.53155, -0.66311, 0.13157, -0.03271, 1.65915, -0.62645, 0.07635, -1.01009, 1.93374
> + ]
> + }
> + ]
> + },
> "rpi.sharpen":
> {
> }
--
Regards,
Laurent Pinchart
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