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libcamera
v0.4.0
Supporting cameras in Linux since 2019
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The IPA (Image Processing Algorithm) namespace. More...
Classes | |
| class | AgcMeanLuminance |
| A mean-based auto-exposure algorithm. More... | |
| class | Algorithm |
| The base class for all IPA algorithms. More... | |
| class | AlgorithmFactory |
| Registration of Algorithm classes and creation of instances. More... | |
| class | AlgorithmFactoryBase |
| class | CameraSensorHelper |
| Base class for computing sensor tuning parameters using sensor-specific constants. More... | |
| class | CameraSensorHelperFactory |
| Registration of CameraSensorHelperFactory classes and creation of instances. More... | |
| class | CameraSensorHelperFactoryBase |
| Base class for camera sensor helper factories. More... | |
| class | ExposureModeHelper |
| Class for splitting exposure into exposure time and total gain. More... | |
| class | FCQueue |
| A support class for managing FrameContext instances in IPA modules. More... | |
| struct | FrameContext |
| Context for a frame. More... | |
| class | Histogram |
| The base class for creating histograms. More... | |
| class | Interpolator |
| Class for storing, retrieving, and interpolating objects. More... | |
| class | LscPolynomial |
| Class for handling even polynomials used in lens shading correction. More... | |
| class | Lux |
| Class that implements lux estimation. More... | |
| class | Module |
| The base class for all IPA modules. More... | |
| class | Pwl |
| Describe a univariate piecewise linear function in two-dimensional real space. More... | |
| class | Vector |
| Vector class. More... | |
Typedefs | |
| template<typename T > | |
| using | RGB = Vector< T, 3 > |
| A Vector of 3 elements representing an RGB pixel value. | |
Functions | |
| double | rec601LuminanceFromRGB (const RGB< double > &rgb) |
| Estimate luminance from RGB values following ITU-R BT.601. More... | |
| uint32_t | estimateCCT (const RGB< double > &rgb) |
| Estimate correlated colour temperature from RGB color space input. More... | |
| template<unsigned int I, unsigned int F, typename R , typename T > | |
| constexpr R | floatingToFixedPoint (T number) |
| Convert a floating point number to a fixed-point representation. More... | |
| template<unsigned int I, unsigned int F, typename R , typename T > | |
| constexpr R | fixedToFloatingPoint (T number) |
| Convert a fixed-point number to a floating point representation. More... | |
| template<typename T , unsigned int Rows, unsigned int Cols> | |
| Vector< T, Rows > | operator* (const Matrix< T, Rows, Cols > &m, const Vector< T, Cols > &v) |
| Multiply a matrix by a vector. More... | |
| template<typename T , unsigned int Rows> | |
| bool | operator== (const Vector< T, Rows > &lhs, const Vector< T, Rows > &rhs) |
| Compare vectors for equality. More... | |
| template<typename T , unsigned int Rows> | |
| bool | operator!= (const Vector< T, Rows > &lhs, const Vector< T, Rows > &rhs) |
| Compare vectors for inequality. More... | |
The IPA (Image Processing Algorithm) namespace.
The IPA namespace groups all types specific to IPA modules. It serves as the top-level namespace for the IPA library libipa, and also contains module-specific namespaces for IPA modules.
| uint32_t libcamera::ipa::estimateCCT | ( | const RGB< double > & | rgb | ) |
Estimate correlated colour temperature from RGB color space input.
| [in] | rgb | The RGB value |
This function estimates the correlated color temperature RGB color space input. In physics and color science, the Planckian locus or black body locus is the path or locus that the color of an incandescent black body would take in a particular chromaticity space as the black body temperature changes.
If a narrow range of color temperatures is considered (those encapsulating daylight being the most practical case) one can approximate the Planckian locus in order to calculate the CCT in terms of chromaticity coordinates.
More detailed information can be found in: https://en.wikipedia.org/wiki/Color_temperature#Approximation
| R libcamera::ipa::fixedToFloatingPoint | ( | T | number | ) |
Convert a fixed-point number to a floating point representation.
| I | Bit width of the integer part of the fixed-point |
| F | Bit width of the fractional part of the fixed-point |
| R | Return type of the floating point representation |
| T | Input type of the fixed-point representation |
| number | The fixed point number to convert to floating point |
| R libcamera::ipa::floatingToFixedPoint | ( | T | number | ) |
Convert a floating point number to a fixed-point representation.
| I | Bit width of the integer part of the fixed-point |
| F | Bit width of the fractional part of the fixed-point |
| R | Return type of the fixed-point representation |
| T | Input type of the floating point representation |
| number | The floating point number to convert to fixed point |
| bool libcamera::ipa::operator!= | ( | const Vector< T, Rows > & | lhs, |
| const Vector< T, Rows > & | rhs | ||
| ) |
Compare vectors for inequality.
| Vector< T, Rows > libcamera::ipa::operator* | ( | const Matrix< T, Rows, Cols > & | m, |
| const Vector< T, Cols > & | v | ||
| ) |
Multiply a matrix by a vector.
| T | Numerical type of the contents of the matrix and vector |
| Rows | The number of rows in the matrix |
| Cols | The number of columns in the matrix (= rows in the vector) |
| m | The matrix |
| v | The vector |
| bool libcamera::ipa::operator== | ( | const Vector< T, Rows > & | lhs, |
| const Vector< T, Rows > & | rhs | ||
| ) |
Compare vectors for equality.
| double libcamera::ipa::rec601LuminanceFromRGB | ( | const RGB< double > & | rgb | ) |
Estimate luminance from RGB values following ITU-R BT.601.
| [in] | rgb | The RGB value |
This function estimates a luminance value from a triplet of Red, Green and Blue values, following the formula defined by ITU-R Recommendation BT.601-7 which can be found at https://www.itu.int/rec/R-REC-BT.601
1.8.13