Real time preview - Filters of my Choice

Hi all

I'm back with one more query. I'm working on new gallery of filters of my choice, which will allow me to choose one from the available filters (filter1-reduce cyan by 10%, filter2-reduce yellow by 20% . . .) I am able to create preview of the file opened but not sure how to get the preview of the filter chosen by me without saving the file. Do i need to save each filter effect as some dummy file and then display preview or something like that?

My thoughts are still in the initial stage and i'm open to suggestion(s). Let me know your thoughts pl.