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The bayesian AWB algorithm is an AWB algorithm that takes prior
probabilities for a given light source dependent on the current lux
level into account.
The biggest improvement compared to the grey world model comes from the
search of the ideal white point on the CT curve. The algorithm walks the
CT curve to minimize the colour error for a given statistics. After the
minimium is found it additionally tries to search the area around that
spot and also off the curve. So even without defined prior probabilities
this algorithm provides much better results than the grey world
algorithm.
The logic for this code was taken from the RaspberryPi implementation.
The logic was only minimally adjusted for usage with the rkisp1 and a
few things were left out (see doxygen doc for the AwbBayes class). The
code is refactored to better fit the libcamera code style and to make
use of the syntactic sugar provided by the Interpolator and Vector
classes.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
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Add the grey world algorithm that is currently used in rkisp1 to libipa.
No changes in functionality were made.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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The AWB modes are specified in the libcamera core controls. It is
therefore quite likely that every AWB algorithm will implement them. Add
helper functions for parsing and storing the configured modes in the
AwbAlgorithm base class.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
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Add a class to provide a generic interface for auto white balance
algorithms. Concrete AWB algorithms are expected to subclass the
AwbAlgorithm class to implement their functionality.
IPAs are expected to subclass the AwbStats class and implement the
necessary functions to give the algorithm access to the hardware
specific statistics data.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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Sometimes it is necessary to clear a pwl. Add a function for that.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
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The only way to access the internal data of an Interpolator is through
the getInterpolated() method. Sometimes it is necessary to to access the
internal data directly to iterate over it. Add an accessor for that.
While at it, remove a line break from the doxygen documentation for
interpolate() so that doxygen is able to correctly match the function.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
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The Vector class from libipa is not used anymore. Drop it.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Acked-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Now that there is a Vector class in libcamera, use that one.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Naushir Patuck <naush@raspberrypi.com>
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Indentation in a doxygen comment is wrong, fix it.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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Add a Lux helper to libipa that does the estimation of the lux level
given gain, exposure, and luminance histogram. The helper also
handles reading the reference values from the tuning file. These are
expected to be common operations of lux algorithm modules in IPAs, and
is modeled/copied from Raspberry Pi.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Isaac Scott <isaac.scott@ideasonboard.com>
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The rkisp1 IPA has some utility functions to convert between fixed
and floating point numbers. Move those to libipa so they're available
for use in other IPA modules too.
Signed-off-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Use an `std::variant` to store the analogue gain instead of a bare union + tag.
Signed-off-by: Barnabás Pőcze <pobrn@protonmail.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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In d0478c41f432 ("libcamera: Rename "shutter speed" to "exposure time"")
the tuning file entry "shutter" was renamed to "exposure-time". As the
tuning files use camel cased key names, change "exposure-time" to
"exposureTime" for consistency. It doesn't break our users setups as
there are no tuning files using that entry in the wild (at least
officially).
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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There are no users of the libipa::Matrix class anymore. Drop it.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Use the Matrix class from libcamera/internal in libipa so that the one
from libipa can be dropped later.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Provide the GalaxyCore gc08a3 camera sensor properties and registration
with libipa for the gain code helpers.
Signed-off-by: Han-Lin Chen <hanlinchen@chromium.org>
Co-developed-by: Xing Gu <xinggu@chromium.org>
Signed-off-by: Xing Gu <xinggu@chromium.org>
Co-developed-by: Yudhistira Erlandinata <yerlandinata@chromium.org>
Signed-off-by: Yudhistira Erlandinata <yerlandinata@chromium.org>
Co-developed-by: Harvey Yang <chenghaoyang@chromium.org>
Signed-off-by: Harvey Yang <chenghaoyang@chromium.org>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Provide the GalaxyCore gc05a2 camera sensor properties and registration
with libipa for the gain code helpers.
Signed-off-by: Han-Lin Chen <hanlinchen@chromium.org>
Co-developed-by: Xing Gu <xinggu@chromium.org>
Signed-off-by: Xing Gu <xinggu@chromium.org>
Co-developed-by: Yudhistira Erlandinata <yerlandinata@chromium.org>
Signed-off-by: Yudhistira Erlandinata <yerlandinata@chromium.org>
Co-developed-by: Harvey Yang <chenghaoyang@chromium.org>
Signed-off-by: Harvey Yang <chenghaoyang@chromium.org>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Replace the manual vector and matrix calculations with usage of the
Vector and Matrix classes. This simplifies the code and improves
readability.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
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The rec601LuminanceFromRGB() and estimateCCT() functions take RGB
triplets as three variables. Replace them with instances of the RGB
class and adapt the users accordingly. Only variables passed directly to
these functions are converted to RGB instances, further conversion of
IPA modules to the RGB class will be performed separately.
While at it, fix a typo in the documentation of the estimateCCT()
function.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
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Add a function to calculate the sum of a vector. It will be useful for
algorithms.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
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Add functions to calculate the element-wise minimum and maximum of two
vectors or of a vector and a scalar. This will be used in algorithm
implementations.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
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Extend the Vector class with compound assignment operators that match
the binary arithmetic operators.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
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The Vector class defines multiple element-wise arithmetic operators
between vectors or between a vector and a scalar. A few variants are
missing. Add them.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
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Instead of hand-coding all arithmetic operators, implement them based on
a generic apply() function that takes an operator-specific binary
operators. This will simplify adding missing arithmetic operators.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
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The Vector class defines a set of arithmetic operators between two
vectors or a vector and a scalar. All the operators perform element-wise
operations, except for the operator*() that computes the dot product.
This is inconsistent and confusing. Replace the operator with a dot()
function.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
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The default constructor leaves the vector data uninitialized. Add a
constructor to fill the vector with copies of a scalar value, and fix
the documentation of the default constructor.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
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The Vector class can be useful to represent RGB pixel values. Add r(),
g() and b() accessors, similar to x(), y() and z(), along with an RGB
type that aliases Vector<T, 3>.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
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The x(), y() and z() functions of the Vector class are convenience
accessors for the first, second and third element of the vector
respectively, meant to improve readability of class users when a vector
represents coordinates in 1D, 2D or 3D space. Those accessors are
limited to immutable access to the vector elements, as they return a
copy. Extend the API with mutable accessors.
The immutable accessors are modified to return a reference to the vector
elements instead of a copy for consistency. As they are inline
functions, this should make no difference in terms of performance as the
compiler can perform the same optimizations in their case.
While at it, reorder functions to declare operators before other member
functions, to be consistent with the usual coding style.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
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The terms "shutter" and "shutter speed" are used through libcamera to
mean "exposure time". This is confusing, both due to "speed" being used
as "time" while it should be the inverse (i.e. a maximum speed should
correspond to the minimum time), and due to "shutter speed" and
"exposure time" being used in different places with the same meaning.
To improve clarity of the code base and the documentation, use "exposure
time" consistently to replace "shutter speed".
This rename highlighted another vocabulary issue in libcamera. The
ExposureModeHelper::splitExposure() function used to document that it
splits "exposure time into shutter time and gain". It has been reworded
to "split exposure into exposure time and gain". That is not entirely
satisfactory, as "exposure" has a defined meaning in photography (see
https://en.wikipedia.org/wiki/Exposure_(photography)) that is not
expressed as a duration. This issue if left to be addressed separately.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Naushir Patuck <naush@raspberrypi.com>
Acked-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Report the default sensor black level reported by the datasheet.
Note that IMX327 and IMX462 depend on the IMX290 CameraSensorHelper.
That's fine since those sensors report the same defaults for the
black level as the Sony IMX290.
Signed-off-by: Geoffrey Van Landeghem <geoffrey.vl@gmail.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
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The sensor is largely compatible with the already supported
Sony IMX290 so we can reuse the same helpers for the analogue
gain conversion functions.
Signed-off-by: Geoffrey Van Landeghem <geoffrey.vl@gmail.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
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Some IPA modules, like the RkISP1 one, call FCQueue::get(0) at
IPA::start() time, before any frame context has been allocated with
FCQueue::alloc() called at queueRequest() time.
The FCQueue implementation aims to detect when a FrameContext is get()
before it is alloc()-ated, Warns about it, and initializes the
FrameContext before returning it.
In case of frame#0, a get() preceding an alloc() call is not detected
as the "frame == frameContext.frame" test returns success, as
FrameContexts are zeroed by default.
As a result, the first returned FrameContext is not initialized.
Explicitly test for frame#0 to make sure the FrameContext is initialized
if get(0) is called before alloc(0). To avoid re-initializing a frame
context, in case alloc() has been called correctly before get(),
introduce an "initialised" state variable that tracks the FrameContext
initialisation state.
Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>
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We start to have some functions relating to colour that are
effectively identical crop up across the IPA modules. Add a file
allowing those to be centralised within libipa so that a single
implementation can be used in all of the IPAs.
Signed-off-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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For debugging purposes it is helpful to access the internal data of the
histogram. Add an accessor for that.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Previous iterations of the ExposureModeHelper class had a
setShutterGainLimits() function, which got renamed to setLimits(). The
documentation still uses the old name. Fix it.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
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Provide the Sony IMX214 camera sensor properties and registration with
libipa for the gain code helpers.
Signed-off-by: André Apitzsch <git@apitzsch.eu>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Add a basic class to represent polynomials as specified in the DNG spec
for vignetting correction.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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The MatrixInterpolator is no longer used. Remove it.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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The MatrixInterpolator is great for interpolation of matrices for
different color temperatures. It has however one limitation - it can
only handle matrices. For LSC it would be great to interpolate the LSC
tables (or even polynomials) using the same approach. Add a generic
Interpolator class based on the existing MatrixInterpolator. This class
can be adapted to any other type using partial template specialization.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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Report the default sensor black level reported by the datasheet.
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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The includes that are not used can be removed. And two identified
missing includes (directly used but available only through other
includes) are added.
Signed-off-by: Milan Zamazal <mzamazal@redhat.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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The constructor reference was missing, causing the constructor
documentation to appear in blackLevel() documentation.
Signed-off-by: Milan Zamazal <mzamazal@redhat.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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The libcamera coding style groups the C and C++ standard library headers
in a single group. Fix the few offenders in the source tree.
While at it, add a missing blank line between header groups in a
separate location.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
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The documentation for the blackLevel_ member is very terse. Reference
the more complete documentation of the sibling blackLevel() member
function to provide more information.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Provide the onsemi AR0144 camera sensor properties and registration with
libipa for the gain code helpers.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Add black level value for OV5675 camera sensor.
According to datasheet, default value is 0x10, 10 bits width.
However, Linux kernel driver initializes black level target value
to 0x40. Set the value to the same as in kernel driver, but scaled
to 16 bits.
Signed-off-by: Daniel Semkowicz <dse@thaumatec.com>
Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Move black levels for tuning files that contained a BLC block into
the camera sensor helpers.
ov4689.yaml had 66@12bit while the datasheet states 64@12bit. Use the
value from the datasheet (scaled to 16bit).
ov5640.yaml had 256@12bit while the datasheet states 16@10bit. Looking
at the commit message the 256 most likely stems from the imx219 tuning
file and 16@10bit is the same as the 64@12bit from the ov4689. This
seems more likely and is therefore used.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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For a proper tuning process we need to know the sensor black levels. In
most cases these are fixed and not reported by the kernel driver. Store
them inside the sensor helpers for later retrieval by the algorithms.
Add black level value corresponding to the data pedestal for three
initial sensors as documented in the datasheets. More should be added,
eventually filling the gaps for all supported sensors.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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The gcc used in my current buildroot (Version 12.3) errors out with
-Wmaybe-uninitialized. Fix that.
Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com>
Reviewed-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
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The matrixVlidateYaml() function is declared in the libcamera::ipa::
namespace, but defined in the libcamera:: namespace. This causes a
dynamic linking error at runtime. Fix it by moving the function
definition.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
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