# make a directory and cd to it.
$ mkdir ~/Github_wiki && cd $_
# clone your wiki
$ git clone git@github.com:USER/REPO.wiki.git
# create a image dir and cd to it.
$ mkdir images && cd -
# add images in images dir
$ mv ~/somedir/someimage.png ~/Github_wiki/REPO.wiki/images/someimage.png
# add, commit and push it
$ git add .
$ git commit -m "someimage.png added"
$ git push origin master
Go to your wiki and add a sample page and add the following.
![sample image](images/vimnote1.png)
The above image is added with `![sample image](images/someimage.png)`
This image can be found here, https://raw.github.com/wiki/shinokada/vimnotes/images/someimage.png
Adding link to an image.
[![Alt attribute text Here](images/someimage.png)](http://google.com)