A class to handle black level correction. More...

Inheritance diagram for libcamera::ipa::ipu3::algorithms::BlackLevelCorrection:

Collaboration diagram for libcamera::ipa::ipu3::algorithms::BlackLevelCorrection:

Public Member Functions
void	prepare (IPAContext &context, const uint32_t frame, IPAFrameContext &frameContext, ipu3_uapi_params *params) override
	Fill in the parameter structure, and enable black level correction. More...

Public Member Functions inherited from libcamera::ipa::Algorithm< _Module >
virtual int	init ([[maybe_unused]] typename Module::Context &context, [[maybe_unused]] const YamlObject &tuningData)
	Initialize the Algorithm with tuning data. More...

virtual int	configure ([[maybe_unused]] typename Module::Context &context, [[maybe_unused]] const typename Module::Config &configInfo)
	Configure the Algorithm given an IPAConfigInfo. More...

virtual void	queueRequest ([[maybe_unused]] typename Module::Context &context, [[maybe_unused]] const uint32_t frame, [[maybe_unused]] typename Module::FrameContext &frameContext, [[maybe_unused]] const ControlList &controls)
	Provide control values to the algorithm. More...

virtual void	prepare ([[maybe_unused]] typename Module::Context &context, [[maybe_unused]] const uint32_t frame, [[maybe_unused]] typename Module::FrameContext &frameContext, [[maybe_unused]] typename Module::Params *params)
	Fill the params buffer with ISP processing parameters for a frame. More...

virtual void	process ([[maybe_unused]] typename Module::Context &context, [[maybe_unused]] const uint32_t frame, [[maybe_unused]] typename Module::FrameContext &frameContext, [[maybe_unused]] const typename Module::Stats *stats, [[maybe_unused]] ControlList &metadata)
	Process ISP statistics, and run algorithm operations. More...

Additional Inherited Members
Public Types inherited from libcamera::ipa::Algorithm< _Module >
using	Module = _Module
	The IPA module type for this class of algorithms.

Detailed Description

A class to handle black level correction.

The pixels output by the camera normally include a black level, because sensors do not always report a signal level of '0' for black. Pixels at or below this level should be considered black. To achieve that, the ImgU BLC algorithm subtracts a configurable offset from all pixels.

The black level can be measured at runtime from an optical dark region of the camera sensor, or measured during the camera tuning process. The first option isn't currently supported.

Member Function Documentation

◆ prepare()

void libcamera::ipa::ipu3::algorithms::BlackLevelCorrection::prepare	(	IPAContext &	context,
		const uint32_t	frame,
		IPAFrameContext &	frameContext,
		ipu3_uapi_params *	params
	)

override

Fill in the parameter structure, and enable black level correction.

Parameters

[in]	context	The shared IPA context
[in]	frame	The frame context sequence number
[in]	frameContext	The FrameContext for this frame
[out]	params	The IPU3 parameters

Populate the IPU3 parameter structure with the correction values for each channel and enable the corresponding ImgU block processing.

The documentation for this class was generated from the following files:

src/ipa/ipu3/algorithms/blc.h
src/ipa/ipu3/algorithms/blc.cpp

Public Member Functions

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ prepare()