If you were previously using Grow (Social Pug) for defining custom Pinterest images and descriptions, you can use the following code to use that data for the Pinterest share button in Shared Counts.
Filter: shared_counts_single_image
Summary: Image used by Pinterest for singular content (post, page…). Set to Featured Image by default.
Tasty Pins integration for Shared Counts
Tasty Pins is a popular plugin for optimizing your content for Pinterest. It includes a feature to specify a Pinterest-specific image and description, just like the Shared Counts – Pinterest Image addon. The following code will let Shared Counts use the image and description you specify in Tasty Pins: