I need a bulk background removing service/software

We have thousands of product images that have white or black or gradient background. We're looking for a software开发者_Go百科 or service that can remove the pictures backgrounds. We need an smart software that do the job very fine.

In photoshop you can record actions as well as batch process files. Creating an action that would work with every mentioned background may be tricky - solid colors should be easy, but gradients not so much.