Data Driven / Scripting Compute Pipeline

I have a library of image processing algorithms, and I want to create a simple data driven scripting type system, basically to chain a sequence of image processing algorithms. Does anyone know of some open source libraries that already do this that I can look at to get some ideas?

It seems mostly straightforward, but dynamic kernel parameters are bothering me. Fixed parameters could be specified in the script, and the output of one process will serve as input for the other. However, there will be some algorithms where the parameters need to be adjusted on the fly by the application. For example, maybe an array of values needs to be changed based on the application state that an image process depends on. Obviously these can’t be hardcoded in the data file. I can’t really think of a clean way to handle this other than using some type of reflection to figure out what type of image process we are doing and what parameters it expects as input.