How to Retrieve Photos from iPhone Backup on iMac

Hey Guys,
To cut my long story short. I cannot restore my most recent iphone backup from my imac, itunes keeps telling me it's corrupt.
I updated to the latest mac os and ios and it still says it's corrupt.

So anyone know how I can access my photos directly from the itunes backup, and to make things worst all my iphone back ups are password protected. I know the location of the back folder.

Any suggestions would be good.