issue #980 resolves - Some module has a round error similar to #975.  (#981)

* round function changes to cvRound

Minor changes to fix lower visual studio version build errors.

* round function changes to cvRound

Minor changes to fix lower visual studio version build errors.

* round function changes to cvRound

Minor changes to fix lower visual studio version build errors.

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

added thinning sample
added thinning tests

* 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

- read image as 1-channel grayscale
- 3 trackers to control function parameters
- K allowed to go to negative values (usually to detect black text on white bg)

- no for-loops
- support all thresholding types
- support any input image depth
- add Doxygen comments

otherwise we get a failed assertion from OutputArray::create

cvx::checkHardwareSupport uses static field to store flags.
Using a global static to store the result is dangerous, as the underlying field checkHardwareSupport uses might not be initialized at that time.