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0db2c8dc75
Initial implementation of the Raspberry Pi (BCM2835) libcamera IPA and associated libraries. All code is licensed under the BSD-2-Clause terms. Copyright (c) 2019-2020 Raspberry Pi Trading Ltd. Signed-off-by: Naushir Patuck <naush@raspberrypi.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
29 lines
898 B
C
29 lines
898 B
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/*
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* Copyright (C) 2019, Raspberry Pi (Trading) Limited
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*
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* lux_status.h - Lux control algorithm status
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*/
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#pragma once
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// The "lux" algorithm looks at the (AGC) histogram statistics of the frame and
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// estimates the current lux level of the scene. It does this by a simple ratio
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// calculation comparing to a reference image that was taken in known conditions
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// with known statistics and a properly measured lux level. There is a slight
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// problem with aperture, in that it may be variable without the system knowing
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// or being aware of it. In this case an external application may set a
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// "current_aperture" value if it wishes, which would be used in place of the
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// (presumably meaningless) value in the image metadata.
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct LuxStatus {
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double lux;
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double aperture;
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};
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#ifdef __cplusplus
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}
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#endif
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