* Python wrapper for detail

* hide pyrotationwrapper

* copy code in pyopencv_rotationwarper.hpp

* move ImageFeatures MatchInfo and CameraParams in core/misc/

* add python test for detail

* move test_detail in test_stitching

* rename

Stitching: added functions to set warp interpolation mode (#13449)

* Added functions to set warp interpolation mode

* Use InterpolationFlags enum

* Improved getter/setter naming

* Create text_detection.py

#12270 #13429
**Deep Learning text detection sample (Python)**
- Tested on **Ubuntu 18.04** - OpenCV 3.4.3, OpenCV 3.4.4, OpenCV 4.0 (master branch)
- Python version supported - Python 2 and Python 3

* Fix trailing whitespaces

* Update text_detection.py

* Remove whitespace

* Remove comments

* Remove unused packages

* Update description

used by OpenCV

Resolves #13375

* conversions of color_rgb.cpp vectorized

* CL impl: coeffs updated

* unused constants removed

* CUDA color coeffs updated

Optimize exposure compensation (#13400)

* Added perf test

* Optimized gains computation

* Use Eigen for gains calculation

broken in 11eafca3

RGB to/from Gray rewritten to wide intrinsics (#13379)

* 5x5 to RGB added

* RGB25x5 added

* Gray2RGB added

* Gray2RGB5x5 added

* vx_set moved out of loops

* RGB5x52Gray added

* RGB2Gray written

* warnings fixed (int -> (u)short conversion)

* warning fixed

* warning fixed

* "i < n-vsize+1" to "i <= n-vsize"

* RGBA2mRGBA vectorized

* try to fix ARM builds

* fixed ARM build for RGB2RGB5x5

* mRGBA2RGBA: saturation, vectorization

* fixed CL implementation of mRGBA2RGBA (saturation added)

Replaced CV_TM_SQDIFF to TM_SQDIFF and the rest since methods are renamed in opencv 3.4

* added performance test for compareHist

* compareHist reworked to use wide universal intrinsics

* Disabled vectorization for CV_COMP_CORREL and CV_COMP_BHATTACHARYYA if f64 is unsupported