Request: to filter images without a color mask eg. white

[estatistics]

If you have a collection of images that have a common background eg. white, and they picture shoes, or dresses, it is hard to order them with filters cause all have same orientation, similar size, similar color etc.

It will be nice to an extra filter "which color to subtract from images as background?" or something like this.
I know that i can do it with external tools.

Check the following image.