nilearn/nilearn — pull request #145 by rphlypo (2013-12-05 12:43:51+00:00)
Title: added a closing operation to the masker to avoid 'gaps' in the mask

Adding a mathematical closing operation after the mathematical opening to avoid spurious gaps due to the thresholding observed in some images.

At this moment the `closing` operator must be smaller than or equal to the ̀opening` operator, any comments or suggestions are welcome.