OpenVX is an open, royalty-free standard for cross platform acceleration of computer vision applications.
Looks like Dmitry Matveev is working on introducing OpenVX in Pharo. According to the SmalltalkHub project page of PharoVX the Khronos reference implementation is supported. The code uses NativeBoost for the binding. He is working on it while at ESUG2015.
Update: it is now available on GitHub https://github.com/dmatveev/pharovx-homepage/blob/master/index.md