docs: fix Kroeger2016 bib reference

move from opencv_contrib

Search for matches between a color image patch and an input color image

* First commit

* indentation

Hey there, completely new to `openCV` in general and to the `bioinspired` module in particular. I wanted to give this module a try with python and found that the example source code doesn't work with current openCV (that's 3.4.1 on my Fedora machine).  Apparently, there was a change in how a `Retina` object is created. I fixed the python source code correspondingly. I also changed the C++ source code in this doc file, although I think this needs further updating as there are more changes in the actual source code.

* fbs disparity filtering fix

* fbs fix vol II

* fbs doc update

* fix unused variables warnings in disparity_filtering.cpp

* trailing whitespaces removed

* add fast bilateral solver from master

* fix unused variables warnings in disparity_filtering.cpp

* trailing whitespaces removed

https://github.com/opencv/opencv/commit/787f5236a95f9669ea9ebde11888b3ac2216b535

https://github.com/opencv/opencv/commit/9636ffc47165e6c69f7e31a065f687e2cf739c50