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authorDavid Plowman <david.plowman@raspberrypi.com>2020-11-23 07:37:58 +0000
committerKieran Bingham <kieran.bingham@ideasonboard.com>2020-11-23 14:24:24 +0000
commit9db94a3635b8cc0963fdbc8e33c07890ce177359 (patch)
tree11743b34587a39b1fb288600e3e3c6e2e750f617 /src/ipa/raspberrypi/data/imx477.json
parent6af665992d48eb30bda901af73294f83b17876e7 (diff)
libcamera: ipa: raspberrypi: agc: Improve centre-weighted luminance calucation
Previously the calculation computed Y for each region before returning the weighted average, which "baked in" the over-importance of small statistics regions. The revised calculation will treat all pixels equally when the region weights are the same, making it easier to use. With the previous scheme, proper "average" metering was difficult to implement. Signed-off-by: David Plowman <david.plowman@raspberrypi.com> Reviewed-by: Naushir Patuck <naush@raspberrypi.com> Acked-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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