Use the newly introduced packed intrinsics, which allows to remove
code which was initializing parameters block based on distortion
model type.
Now such initialization is done by a particular implementation of
a distortion model.
Differential Revision: https://developer.blender.org/D9192
This is a common class which can be used in all sort of minimization
problems which needs camera intrinsics as a parameter block.
Currently unused, but will replace a lot of hard-coded logic in the
bundle adjustment code.
Corrects incorrect usage of contraction for 'it is', when possessive 'its' was required.
Differential Revision: https://developer.blender.org/D9250
Reviewed by Campbell Barton
There would be eigen alignment issues with the custom libmv vector
class when compiling with AVX optimizations. This would lead to
segfaults.
Simply use the std::vector base class as suggested by the old TODO in
the class header.
Reviewed By: Sergey
Differential Revision: http://developer.blender.org/D8968
That was a suboptimal decision from back in the days, which ended up
being problematic. It is no longer used, so remove it from API making
it so new code does not depend on this weak concept.
The order got broken when Brown distortion model has been added.
Made it so the indexing of parameters is strictly defined in the
parameter block, matching how parameters are used in the cost
function.
There is some duplication going on accessing parameters. This can
be refactored in the future, by either moving common parts packing
and cost function to an utility function in bundle.cc.
Alternatively, can introduce a public PackedIntrinsics class which
will contain a continuous block of parameters, and each of the
camera models will have API to be initialized from packed form and
to create this packed form.
The benefit of this approach over alternative solutions previously
made in the master branch or suggested in D9116 is that the specific
implementation of BA does not dictate the way how public classes need
to be organized. It is API which needs to define how implementation
goes, not the other way around.
Thanks Bastien and Ivan for the investigation!
This reverts commit 7e836bde11.
Reverting the incomplete workaround, due to the following reasoning:
- There should be no dependency between CameraIntrinsics and the bundler
code. This violates intended abstraction of the intrinsics class.
- The fix was not complete, or wrong. Even in the world where there is
a requirement to the parameters storage size this should have applied
to all distortion models, including Divisions, Nuke.
Proper fix will be committed next.
The leak was happening when problem did not have any parameters blocks
defined. This happens, for example, if there are no 3D points at all,
or when all markers are set to 0 weight.
Was noticeable in libmv_modal_solver_test when building with LSAN
enabled.
Current libmv_modal_solver_test fails since rB3a7d62cd1f5e.
It appears that the issue is caused by the insertion of the new OFFSET_K4 parameter,
as, if camera intrinsics are not required to implement/use all of those deform
parameters, they absolutely have to keep order (values) matching those defined
in bundle.cc, otherwise `PackIntrinisicsIntoArray` and `UnpackIntrinsicsFromArray`
will mangle them around.
Implemented Brown-Conrady lens distortion model with 4 radial and
2 tangential coefficients to improve compatibility with other software,
such as Agisoft Photoscan/Metashapes, 3DF Zephir, RealityCapture,
Bentley ContextCapture, Alisevision Meshroom(opensource).
Also older programs: Bundler, CPMVS.
In general terms, most photogrammetric software.
The new model is available under the distortion model menu in Lens
settings.
For tests and demos check the original patch.
Reviewed By: sergey
Differential Revision: https://developer.blender.org/D9037
This commit introduces a new way to build unit tests. It is now possible
for each module to generate its own test library. The tests in these
libraries are then bundled into a single executable.
The test executable can be run with `ctest`. Even though the tests
reside in a single executable, they are still exposed as individual
tests to `ctest`, and thus can be selected via its `-R` argument.
Not yet ported tests still build & run as before.
The following rules apply:
- Test code should reside in the same directory as the code under test.
- Tests that target functionality in `somefile.{c,cc}` should reside in
`somefile_test.cc`.
- The namespace for tests is the `tests` sub-namespace of the code under
test. For example, tests for `blender::bke` should be in
`blender::bke:tests`.
- The test files should be listed in the module's `CMakeLists.txt` in a
`blender_add_test_lib()` call. See the `blenkernel` module for an
example.
Reviewed By: brecht
Differential Revision: https://developer.blender.org/D7649
The unit being "pixels".
Before this change the solve errors were unitless in the UI.
With this change in place, the UI is now clear on that the unit of the
reprojection errors is pixels (px).
Differential Revision: https://developer.blender.org/D8000
Using latest master because of various compilation error fixes.
Brings a lot of recent development. From most interesting parts:
- New threading model.
- Tiny solver.
- Compatibility with C++17.
Don't use linear array with frame as an index since it has the
following disadvantages:
- Requires every application to take care of frame remapping, which
could be way more annoying than it sounds.
- Inefficient from memory point of view when solving part of a footage
which is closer to the end of frame range.
Using map technically is slower from performance point of view, but
could not feel any difference as the actual computation is way more
complex than access of camera on individual frames.
Solves crash aspect of T72009
Neither Nuke nor Natron support OpenCV's radial distortion model
which makes it impossible to have any kind of interoperability.
The new model is available under the distortion model menu in Lens
settings.
Differential Revision: https://developer.blender.org/D7484
Initial bundle adjustment only supported OpenCV's radial distortion
model, so the cost functor was called after it.
Nowadays it supports more than this single model, so naming was a bit
wrong and misleading.
For a real-world distortion the payload is quite uniformly
distributed across scanlines. Surely, in the corners more
iterations of minimizer is needed, but that happens in threads
without scheduling overhead.
Need to communicate available number of threads to the camera
intrinsics implementation, otherwise default value of 1 is used.
Must have been single-threaded for a very long time.
This is a more correct fix to the issue Brecht was fixing in D6600.
While the fix in that patch worked fine for linking it broke ASAN
runtime under some circumstances.
For example, `make full debug developer` would compile, but trying
to start blender will cause assert failure in ASAN (related on check
that ASAN is not running already).
Top-level idea: leave it to CMake to keep track of dependency graph.
The root of the issue comes to the fact that target like "blender" is
configured to use a lot of static libraries coming from Blender sources
and to use external static libraries. There is nothing which ensures
order between blender's and external libraries. Only order of blender
libraries is guaranteed.
It was possible that due to a cycle or other circumstances some of
blender libraries would have been passed to linker after libraries
it uses, causing linker errors.
For example, this order will likely fail:
libbf_blenfont.a libfreetype6.a libbf_blenfont.a
This change makes it so blender libraries are explicitly provided
their dependencies to an external libraries, which allows CMake to
ensure they are always linked against them.
General rule here: if bf_foo depends on an external library it is
to be provided to LIBS for bf_foo.
For example, if bf_blenkernel depends on opensubdiv then LIBS in
blenkernel's CMakeLists.txt is to include OPENSUBDIB_LIBRARIES.
The change is made based on searching for used include folders
such as OPENSUBDIV_INCLUDE_DIRS and adding corresponding libraries
to LIBS ion that CMakeLists.txt. Transitive dependencies are not
simplified by this approach, but I am not aware of any downside of
this: CMake should be smart enough to simplify them on its side.
And even if not, this shouldn't affect linking time.
Benefit of not relying on transitive dependencies is that build
system is more robust towards future changes. For example, if
bf_intern_opensubiv is no longer depends on OPENSUBDIV_LIBRARIES
and all such code is moved to bf_blenkernel this will not break
linking.
The not-so-trivial part is change to blender_add_lib (and its
version in Cycles). The complexity is caused by libraries being
provided as a single list argument which doesn't allow to use
different release and debug libraries on Windows. The idea is:
- Have every library prefixed as "optimized" or "debug" if
separation is needed (non-prefixed libraries will be considered
"generic").
- Loop through libraries passed to function and do simple parsing
which will look for "optimized" and "debug" words and specify
following library to corresponding category.
This isn't something particularly great. Alternative would be to
use target_link_libraries() directly, which sounds like more code
but which is more explicit and allows to have more flexibility
and control comparing to wrapper approach.
Tested the following configurations on Linux, macOS and Windows:
- make full debug developer
- make full release developer
- make lite debug developer
- make lite release developer
NOTE: Linux libraries needs to be compiled with D6641 applied,
otherwise, depending on configuration, it's possible to run into
duplicated zlib symbols error.
Differential Revision: https://developer.blender.org/D6642
Previously eigens internal include order somehow implicitly provided
M_PI and friends. The recent eigen version bump broke this implicit
behaviour, better to be explicit that we need the math defines for MSVC.
The code was missing some checks for whether keyframe selection
went successfully and whether reconstruction has been successfully
initialized.
The interface still gives quite generic message, with the details
printed to the console. This can be addressed separately.
Before this change doing something like `--verbose 10 --debug-cycles`
did not properly set verbosity, only using those arguments in an other
way around was leading to a correct verbosity level.
This is an odd-ball: it's a library which has own style and
guidelines, and just happened to be developed by Blender developers
and also happened to rely on some functionality of intern/ for its
C-API.
Might consider using Google's clang-format in the future (this is
what the style is supposed to be in this library).
Sergey Sharybin
Sebastian Parborg
Harley Acheson
Bastien Montagne
Ivan Perevala
Ivan
Sybren A. Stüvel
Johan Walles
Campbell Barton
Sergey Sharybin
Aaron Carlisle
Stefan Werner
Brecht Van Lommel
Lazydodo