Migrated chessboard and circles grid detectors to objdetect #28804
OpenCV Contrib: https://github.com/opencv/opencv_contrib/pull/4125
OpenCV Extra: https://github.com/opencv/opencv_extra/pull/1375
### Pull Request Readiness Checklist
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- [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV
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Fix issues with MultiViewTest.OneLineInitialGuess and MultiViewTest.OneLine #28817
To fix issues caused by https://github.com/opencv/opencv/issues/28789
This probably can be fixed for 4.x, but honestly I don't believe it is worth it to have to deal with users tests failing because it was 0.02% off so we can save them like 2 minutes, so I believe it is best to leave the optimization for 5.x.
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- Added function overload for the simple case
- Added CV_Bool type support for masks
- `parallel_for_` for intrinsics calibration for faster inference
- Homogenize parameters order with other calibrateXXX functions
Reworked multiview calibration interface #26221
- Use InputArray / OutputArray
- Use enum for camera type
- Sort parameters according guidelines
- Made more outputs optional
- Introduce flags and added tests for intrinsics and extrinsics guess.
### Pull Request Readiness Checklist
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C-API cleanup: moved cvErrorStr to new interface, minor ts changes #26101
Merge with opencv/opencv_contrib#3786
**Note:** `toString` might be too generic name (even though it is in `cv::Error::` namespace), another variant is `codeToString` (we have `typeToString` and `depthToString` in check.hpp).
**Note:** _ts_ module seem to have no other C API usage except for `ArrayTest` class which requires refactoring.
C-API cleanup: apps, imgproc_c and some constants #25075
Merge with https://github.com/opencv/opencv_contrib/pull/3642
* Removed obsolete apps - traincascade and createsamples (please use older OpenCV versions if you need them). These apps relied heavily on C-API
* removed all mentions of imgproc C-API headers (imgproc_c.h, types_c.h) - they were empty, included core C-API headers
* replaced usage of several C constants with C++ ones (error codes, norm modes, RNG modes, PCA modes, ...) - most part of this PR (split into two parts - all modules and calib+3d - for easier backporting)
* removed imgproc C-API headers (as separate commit, so that other changes could be backported to 4.x)
Most of these changes can be backported to 4.x.
RegisterCameras function for heterogenious cameras pair #25061
Credits to Linfei Pan
Extracted from https://github.com/opencv/opencv/pull/24052
### Pull Request Readiness Checklist
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---------
Co-authored-by: lpanaf <linpan@student.ethz.ch>
* attempt to add 0d/1d mat support to OpenCV
* revised the patch; now 1D mat is treated as 1xN 2D mat rather than Nx1.
* a step towards 'green' tests
* another little step towards 'green' tests
* calib test failures seem to be fixed now
* more fixes _core & _dnn
* another step towards green ci; even 0D mat's (a.k.a. scalars) are now partly supported!
* * fixed strange bug in aruco/charuco detector, not sure why it did not work
* also fixed a few remaining failures (hopefully) in dnn & core
* disabled failing GAPI tests - too complex to dig into this compiler pipeline
* hopefully fixed java tests
* trying to fix some more tests
* quick followup fix
* continue to fix test failures and warnings
* quick followup fix
* trying to fix some more tests
* partly fixed support for 0D/scalar UMat's
* use updated parseReduce() from upstream
* trying to fix the remaining test failures
* fixed [ch]aruco tests in Python
* still trying to fix tests
* revert "fix" in dnn's CUDA tensor
* trying to fix dnn+CUDA test failures
* fixed 1D umat creation
* hopefully fixed remaining cuda test failures
* removed training whitespaces
Add multiview calibration [GSOC 2022]
### Pull Request Readiness Checklist
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The usage tutorial is on Google Docs following this link: https://docs.google.com/document/d/1k6YpD0tpSVqnVnvU2nzE34K3cp_Po6mLWqXV06CUHwQ/edit?usp=sharing
### Changes
* Port of #22519 to 5.x
* Distortion coefficients were not copied properly, fixed
* Minor coding style chages
### Pull Request Readiness Checklist
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Fixes#23057
Parameter uncertainty fixed + ground truth test data fixed
### Pull Request Readiness Checklist
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variables refactoring
levmarq fix
initIntrinsicParams2D() refactoring
undo LM fix
cameraCalcJErr: made a lambda; warnings fixed; vars rearranged & renamed, jacobian buffers, perViewErrors and allErrors fix, etc.
stereoCalibrate: internal vars in callback
stereoCalibrate: capture only useful variables
stereoCalibrate: perViewError fix + minors
rvecs and tvecs are not pointers anymore
no extra lambda
newObjPoints: no pointers
stdDevs: no pointers
_Jo removed: not used
Range::all() -> rowRange, colRange
param and mask are std::vectors now
indices shortened
tabs
less func-scoped vars; TODOs
less formatting & renaming changes
trailing whitespaces
less diff
less changes
less changes
Range::all() back
perViewErr ptr fix
NINTRINSIC captured
try to fix warning
trying to fix a warning
fix warnings, another attempt
Vincent Rabaud
Alexander Smorkalov
Rohan Mistry
Alexander Smorkalov
WU Jia
Alexander Smorkalov
Maksim Shabunin
Vadim Pisarevsky
lpanaf
Maksym Ivashechkin
Rostislav Vasilikhin
Alexander Alekhin
Andrey Senyaev