PHP or Python for Image Processing?
Possibly neither; it depends on what you want to do.
Both PHP and Python are scripting languages, and are therefore not suited for high-performance numerical routines (which most image processing requires).  However, they both have a number of image-processing libraries available for them, the innards of which are probably written in C.  These will be fast.
If these libraries do what you want, then fine.  If you need to so something custom, then you're probably better off with C or C++ (or Pascal, or whatever) if speed of execution is of concern.
I am writing an application for image processing. I am just wondering which programming language would be the best fit. Python or PHP. This process is system based not web based so I am just thinking if Python could be of more help.
Let me know your thoughts!