I was doing some research on Power View capabilities recently and came across some good blogs on it, thought I will compile and share it:
Video Series: Visualizing the Summer Olympics. Microsoft Senior Program Manager Sean Boon created a good blog series on Power View. He talks about how you can set custom images in power view.
Power View Design Tasks:
Images in PowerView: Static and data linked images
PowerPivot Model for PowerView Reports
Power View Help for SQL Server 2012