diff options
Diffstat (limited to 'src/ipa/ipu3/algorithms/awb.cpp')
| -rw-r--r-- | src/ipa/ipu3/algorithms/awb.cpp | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/src/ipa/ipu3/algorithms/awb.cpp b/src/ipa/ipu3/algorithms/awb.cpp index c5976c6f..91364a04 100644 --- a/src/ipa/ipu3/algorithms/awb.cpp +++ b/src/ipa/ipu3/algorithms/awb.cpp @@ -17,7 +17,14 @@ namespace ipa::ipu3::algorithms { LOG_DEFINE_CATEGORY(IPU3Awb) -static constexpr uint32_t kMinGreenLevelInZone = 32; +/* + * When zones are used for the grey world algorithm, they are only considered if + * their average green value is at least 16/255 (after black level subtraction) + * to exclude zones that are too dark and don't provide relevant colour + * information (on the opposite side of the spectrum, saturated regions are + * excluded by the ImgU statistics engine). + */ +static constexpr uint32_t kMinGreenLevelInZone = 16; /* * Minimum proportion of non-saturated cells in a zone for the zone to be used |