Naushir Patuck
f95bae418c
s/Raspberry Pi (Trading) Limited/Raspberry Pi Ltd/ to reflect the new Raspberry Pi entity name. Signed-off-by: Naushir Patuck <naush@raspberrypi.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
24 lines
822 B
C
24 lines
822 B
C
/* SPDX-License-Identifier: BSD-2-Clause */
|
|
/*
|
|
* Copyright (C) 2019, Raspberry Pi Ltd
|
|
*
|
|
* lux_status.h - Lux control algorithm status
|
|
*/
|
|
#pragma once
|
|
|
|
/*
|
|
* The "lux" algorithm looks at the (AGC) histogram statistics of the frame and
|
|
* estimates the current lux level of the scene. It does this by a simple ratio
|
|
* calculation comparing to a reference image that was taken in known conditions
|
|
* with known statistics and a properly measured lux level. There is a slight
|
|
* problem with aperture, in that it may be variable without the system knowing
|
|
* or being aware of it. In this case an external application may set a
|
|
* "current_aperture" value if it wishes, which would be used in place of the
|
|
* (presumably meaningless) value in the image metadata.
|
|
*/
|
|
|
|
struct LuxStatus {
|
|
double lux;
|
|
double aperture;
|
|
};
|