Jorijn van der Graaf
b48702225b
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Adds imx896.yaml (CCMs for 2800/4000/5750 K) so the main camera gets real colour instead of the uncalibrated fallback. The matrices are numeric calibration data read out of the stock Android tuning blob - measured spectral response of this sensor, not authored expression - and are shipped by the project owner's decision, consistent with the vendor-derived data this image already carries. Durable replacement is to measure our own from a colour chart. Note the file lists Adjust/Agc/Af as well as BlackLevel/Awb/Ccm: a sensor-specific tuning file REPLACES the fallback's algorithm list, so omitting them silently disables auto-exposure and autofocus. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
51 lines
2.1 KiB
YAML
51 lines
2.1 KiB
YAML
# libcamera softISP tuning for the Fairphone 6 main camera (Sony IMX896).
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#
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# CCMs extracted from the FP6 stock Android tuning blob
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# com.qti.tuned.fp6_tsp_imx896.bin (vendor_a.img, sha256 0500766f...c1a5d29f),
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# CamX cc13_ope_v2 module, tree root at 0x2709fe: 3 lux zones, 3-5 CCT
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# regions each, offsets all zero, rows sum to 1.0. This file carries the
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# BRIGHT zone (lux-index trigger 1-200) — the true-color tuning, same
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# convention as the sibling ov13b10.yaml. Note the bright zone has only
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# three CT nodes and merges D50/D65 into one 4800-6700 K region (node
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# placed at its 5750 K midpoint); the lowlight zone has proper 5000/6500 K
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# nodes but at reduced saturation (chroma-noise hiding) — see
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# chromatix/imx896-ccm-awb-extracted.txt for all 12 matrices.
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# CT nodes = the chromatix CCT trigger midpoints: 2800 (A), 4000 (TL84),
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# 5750 (merged D50/D65 region).
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#
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# No blackLevel is set: the IMX896 pedestal has not been measured on this
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# hardware and no datasheet value is available (the softISP then estimates
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# it dynamically per frame). Once a dark-frame measurement exists, add
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# - BlackLevel:
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# blackLevel: <16-bit value>
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#
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# PROVENANCE / LICENSE: the matrices are numeric calibration data read out
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# of the proprietary vendor blob (measured spectral response of this
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# sensor, not authored expression). Shipping decided 2026-08-17 by the
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# project owner, consistent with existing practice in this image; NOT
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# marked CC0. Durable replacement: measure our own matrices from a colour
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# chart with libcamera's tuning tooling.
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%YAML 1.1
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---
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version: 1
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algorithms:
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- BlackLevel:
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- Awb:
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- Ccm:
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ccms:
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- ct: 2800
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ccm: [ 1.593410, -0.552769, -0.040641,
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-0.166429, 1.170414, -0.003985,
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0.004114, -0.855526, 1.851411 ]
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- ct: 4000
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ccm: [ 1.612519, -0.785270, 0.172751,
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-0.110672, 1.189965, -0.079293,
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0.091939, -0.965137, 1.873197 ]
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- ct: 5750
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ccm: [ 1.900000, -0.581250, -0.318750,
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-0.292500, 1.778126, -0.485626,
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0.014573, -0.734843, 1.720270 ]
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- Adjust:
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- Agc:
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- Af:
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...
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