I think that that there was a typo in the variable names. fill2, texture2, and size2 were never used. 
Also, minor fix to reduce initialization costs of vector

* fbs_filter add lambda & revise imtypes

* fix warnings

* fix fbs function prototypes

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

* First commit

* indentation

* 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

The Fast Bilateral Filter (#1819)

PR is created by: berak <px1704@web.de>
based on work https://github.com/opencv/opencv_contrib/pull/1317

* fbs_filter v1.0 has been contributed

* use boost unordered_map

* add brief description for fbs_filter

* fix format

* fix channels bug

* modify doc for fbs_filter

* check c++ 11

* asDiagonal -> diagonal

* rosolve warning

* fix eigen3 dependency

* Eigen/Core

* test HEAV_EIGEN

* setZero bug

* unordered_map test

* fix macro bug

* fix boost not found

* fix eigen macro bug

* fix eigen macro bug

* fix eigen macro bug

* fix eigen macro bug

*  add test file

*  fix test macro

*  fix test macro

*   add test

*   add test

* add sample colorize

* fix macro

*  fix colorize.cpp

*  fix colorize.cpp

*  fix colorize.cpp

*  fix colorize.cpp

* add fbs filter demo

* add fbs filter demo

* add fbs filter demo

* use fgsfilter for guess

* add parameter num_iter and max_tol

* add a option for colorize sample

* add  bibtex

* add  bibtex

* fix a colorize demo bug

* size optimize

* taking over the fast bilateral solver

* taking over the fast bilateral solver

* try to fix test_fbs_filter

* missed a bib bracket

Adds Edge-Preserving Filter (#1690)

* Module EPF - Edge-Preserving Filter added

* Changed name from template to epf

* Removed clang-format file

* Added header Files. Eliminated showWindow function. Used CommandLineParser.

* Moved filter from epf module to ximgproc

* Removed header files from sample

* Minor bug fix in demo. Pointers in demo removed.

* Pointers removed. InputArray/OutputArray added

* License header added

* License header from sample file removed

* Unit test for performance added

* Replaced manual mean computation with cv::mean

* Beautified code via clang-format and https://raw.githubusercontent.com/opencv/opencv_contrib/master/modules/cvv/.clang-format

* Merged historic if... else if statement into one if statement

* Trailing whitespace removed and .. changed into .

* Tabs replaced with 4 spaces.

* Removed subwindow = src(roi);

* Moved type test to beginning of code

* Removed indentation from namespace and added //! @}

* Added name to header

* git cleanup introduced some errors fixed here

* Changed path testdata/perf/320x260.png to perf/320x260.png

* Fixed warning declaration of 'subwindow1' hides previous local declaration

* Fixed warning 'const' qualifier on reference type 'cv::InputArray' (aka 'const cv::_InputArray &') has no effect

* Accuracy test added/

* Renamed void edgepreservingFilter to void edgePreservingFilter

* 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

* Some bugs in deriche and paillou filter

* Cv_Assert to CV_CheckType

* update structured_edge_detection 

update structured_edge_detection to read models from updated p. dollar toolbox

* Update structured_edge_detection.cpp

* Update structured_edge_detection.cpp

casting size_t to int

* remove bug when src is vector Point2i in FourierDescriptors

* remove unused code and comments

* android: fix build warnings

* build: fix warnings

- eliminated "float th = 1e-5f" magic value (replaced to explicit checks)
- eliminate manual memory allocation
- avoid out of range access (i == alls)

* Enabled FastHoughTransform export to python.

* Enabled HoughPoint2Line export

* Update fast_hough_transform.hpp

deleted TODO

* Fixed indentation after enabling exporting.

Bright edges source code and demo (#1449)

* Bright edges source code and demo

* Fix mac errors

* Upload again because of null characters

* Convert to UTF-8

* Change cv::WindowFlags::WINDOW_AUTOSIZE

* Remove parameter

* Remove trailing white spaces (documentation builld error

* Remaining white spaces

* Correct warning

* Correct surround

* Add comment

* Moving prototype out of header

* Add ximgproc namespace, fix example.

* Fix namespace for example

* Remove windows desctruction

* Correct Mat declaration

* Removed unused gray

* Change local functions to static

* Remove tabs and replace by 4 spaces

* Add comments

* Fix comments

* Retry for random test stereo failure