D 2013-09-28T19:12:13.795 L Erode P c02eca873452547b51ada86b0ca557633976fac2 U user W 374

Erode

Application of structural element (like kernel in convolution matrix) on binary image to get more "thick" image. See more [http://en.wikipedia.org/wiki/Erosion_%28morphology%29|here]. For example:
Original image:

Output image:

Z 5a72fafcfc3abccbb43205afbd652548