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temp/libcamera: r9 - zone-gated AWB for the simple IPA (patch 0016)
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Divide the softISP statistics window into 16x12 zones and, when a white
point locus is tuned, vote only with zones whose implied gains lie within
zoneGateMargin of the locus - a large coloured light source can no longer
drag the white balance. Validated on-phone 2026-08-24: keyboard-scene A/B
shows a ~1700 K estimate shift caused solely by the gate (desk renders
neutral instead of blue); torch-toggle stability equal or better than r8
(settle 1.35-1.79 s, ON-edge repeatability +-0.011, CCM churn 21 vs 30
switches); AF regression clean. Evidence:
journal/camera/captures/2026-08-24-awb-zonegate-validation.md

Assisted-by: Claude:claude-fable-5
This commit is contained in:
Jorijn van der Graaf 2026-08-24 01:05:14 +02:00
commit d91963975a
2 changed files with 368 additions and 1 deletions
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4
aports/temp/libcamera/APKBUILD
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@ -3,7 +3,7 @@ maintainer="Robert Mader <robert.mader@collabora.com>"
pkgname=libcamera
_pkgver=0.7.2
pkgver=9999$_pkgver
pkgrel=8
pkgrel=9
pkgdesc="Linux camera framework"
url="https://libcamera.org/"
arch="all"
@ -75,6 +75,7 @@ source="libcamera-v$_pkgver.tar.gz
0013-libcamera-software_isp-af-Add-AfMode-and-focus-witho.patch
0014-libcamera-software_isp-af-Re-baseline-the-scene-refe.patch
0015-ipa-simple-awb-Add-optional-white-point-locus-clamp-.patch
0016-ipa-simple-awb-Gate-the-gray-world-estimate-on-near-.patch
qcam.desktop
$_tuning_files
"
@ -203,6 +204,7 @@ c8ddc64ab943d9b215f4c997f2629e4403744c0ddb5de88cd42d384506a27c0762191eddd4d13559
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18ed6a03fbe3bcd750fac280831d1e62f2a2e35f76880535f2dc16ff196308512535e077ab0d8a923ad241090713edb53d1777e0dd6e5dcc10de495db1277052 0014-libcamera-software_isp-af-Re-baseline-the-scene-refe.patch
b01deba75c093ad4312ffa829ddbe5d745f2dfb199a3f00cdd52a8cb972fbe58bfb7cd94fa825b30d65047ac0c371ecf3ec0d0e356f090119d11086552f514be 0015-ipa-simple-awb-Add-optional-white-point-locus-clamp-.patch
a2dd2d360607c198022fd3353b5e9b4dcb0712abe3f0a6f60de138839b255aedea6a414760e29aa1cab82d0a84633755684d2f28ea0b15541241e51d7f5bd03e 0016-ipa-simple-awb-Gate-the-gray-world-estimate-on-near-.patch
22167a4eceb6d1b40b0b7c45fdf116c71684f5340de7f767535cb8e160ad9d2ae0f00cb3d461f73a344520a48a4641cf46226841d78bee06bfbfd2a91337f754 qcam.desktop
2ee566653b17d565d2c0de67cbe6ebad25df5aac6051cad78e6bae52016fa2ca0247e964d735ac776b3e0bd447ead9c4fcb26cd7629228cdba3ceb91b46f378f hi846.yaml
55dab9dcb9b1982143b9d63e4e51138c5bffd7c8f4a8e4e122750b3ad9d475446956bc297d9f564819ade4be75a575d06633a064e14f8ba3ef77986783c5f067 imx355.yaml