Pictures saved in Events on iPad, how do i transfer to iMac?

I had a Macbook synced with my iPad 2. I uploaded all of my events from said Macbook on to my iPad 2. I sold the Macbook about a year ago. This weekend I ust bought a new iMac. How do I transfer these pictures from my Events on my iPad to my iMac? They are not in my photostream.

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