* run length morphology

* remove unused code, avoid warnings for undefined functions

* handle empty input in getBoundingRectangle correctly, remove unused operations

* changes according to code review

samples added

fix edgeboxes_demo

fix edgeboxes_demo

added edgeboxes bib

fix edgeboxes_demo

small fixes

fix edgeboxes_demo

fix warnings

fix warnings

small fixes

detectEdges needs rgb image instead bgr image.

Removed unnecessary protection

small fixes

1) Modified cv::ximgproc::niBlackThreshold to support binarization using popular Niblack inspired techniques. Sauvola, Wolf, and NICK support added.
2) Changed niblack_thresholding.cpp sample to allow experimentation with these new methods
3) Added/updated docs where appropriate

This simple detector runs up to two times faster than LSD while achieving
competitive results. Please evaluate the algorithm with samples/fld_lines.cpp

* Add bilateral texture filter

* Change tab to space

Paillou Filter

comment : english tab and assert  Mat(instead of new)

InputArray and ptr<Type>()

Outputarrays

OutputArray as argument

Update doc

* Sparse match interpolator interface and EdgeAwareInterpolator were
added to the ximgproc module
* New optical flow algorithm, based on PyrLK sparse OF and sparse match
interpolation, is added to the optflow module

DisparityWLSFilter demonstrated the best results, so I removed all the other
filters. Quality was significantly improved by adding confidence support
to the filter (left-right consistency + penalty for areas near depth discontinuities).
Filter was optimized using parallel_for_ and HAL intrinsics. Demo application was
rewritten for better compliance with OpenCV standards. Added accuracy and
performance tests. Documentation was added, as well as references to the
original papers.