Check for "gutter" around displayed image. there was one row/column missing on the bottom/right.
Might as well set gutter = 0?

* Fix drawMatches and drawKeypoints for BGRA input images

* keep BGRA too

* Combine different input types for drawMatches test

Added filter2d tests for 16S

Commit: 124011c3
PR: https://github.com/opencv/opencv/pull/13392

Sobel filter with 16S/16U datatype is broken.

OpenCV 3.4.5

backport 4ba4901c

https://software.intel.com/en-us/openvino-toolkit