1 | initial version |
You can use the [copyMakeBorder](http://docs.opencv.org/modules/imgproc/doc/filtering.html#void copyMakeBorder(InputArray src, OutputArray dst, int top, int bottom, int left, int right, int borderType, const Scalar& value) function. Border size can be set independently in each direction. Border type can be BORDER_CONSTANT
with a black border value scalar.