libcamera::ipa::LscPolynomial Class Reference

Radial Polynomial LSC algorithm implementation. More...

Inheritance diagram for libcamera::ipa::LscPolynomial:

Collaboration diagram for libcamera::ipa::LscPolynomial:

Public Member Functions
int	parseLscData (const ValueNode &sets, const LscDescriptor &descriptor) override
	Parse polynomial LSC data.
LscImplementation::ComponentsMap	sampleForCrop (const Rectangle &cropRectangle, std::vector< double > xPos, std::vector< double > yPos) override
	Re-sample the LSC components for cropRectangle.
Public Member Functions inherited from libcamera::ipa::LscImplementation
virtual	~LscImplementation ()
	Virtual class destructor.

Additional Inherited Members
Public Types inherited from libcamera::ipa::LscImplementation
using	Components = std::map< std::string, std::vector< float >, std::less<> >
	Associate colour components with a list of gains in float format.
using	ComponentsMap = std::map< unsigned int, Components >
	Associate a colour temperature to a LSC table.

Detailed Description

Radial Polynomial LSC algorithm implementation.

Polynomial-based LSC algorithm implementation. The LscPolynomial class implements LSC support using a Polynomial to represent the shading artifacts map.

See also

LscImplementation

Member Function Documentation

parseLscData()

int libcamera::ipa::LscPolynomial::parseLscData ( const ValueNode &  sets, const LscDescriptor &  descriptor  )

overridevirtual

Parse polynomial LSC data.

Parameters

[in]	sets	The tuning file content
[in]	descriptor	The LSC engine descriptor

Parse the LSC data in polyomial form from the sets tuning data.

Returns

0 on success or a negative error number otherwise

Implements libcamera::ipa::LscImplementation.

sampleForCrop()

LscImplementation::ComponentsMap libcamera::ipa::LscPolynomial::sampleForCrop ( const Rectangle &  cropRectangle, std::vector< double >  xPos, std::vector< double >  yPos  )

overridevirtual

Re-sample the LSC components for cropRectangle.

Parameters

[in]	cropRectangle	The sensor analogue crop rectangle
[in]	xPos	List of horizontal positions of the LSC grid nodes
[in]	yPos	List of vertical positions of the LSC grid nodes

LSC tables have to be re-sampled every time a new sensor configuration is used, as each streaming session might use a different sensor crop rectangle.

Polynomial LSC tables can be re-sampled for a given sensor frame resolution using a list of horizontal and vertical nodes that define the LSC grid on which the polynomial is re-sampled on.

cropRectangle represents the size of the frame on which the LSC tables have to be re-sampled on.

xPos and yPos represent the position of the grid nodes vertexes in the [0, 1] interval. In example an equally spaced grid of 16 nodes will have each segment of size 0.0625 and the list of nodes position will be [0, 0.0625, 0.125, 0.1875, ... , 1]. It is expected that the first position is 0 and the last position is 1.

Implements libcamera::ipa::LscImplementation.

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

• src/ipa/libipa/lsc_polynomial.h
• src/ipa/libipa/lsc_polynomial.cpp