PHP or Python for Image Processing?
One cannot suggest much without knowing the kind of image processing you have in mind.

If you just want to do some generic rotate/resize/etc then I guess there isn't much difference.
If you want to do something more complex, then study the libraries and decide which fits best for your particular task.
If you want to do something really custom, then C or similar language might be a better fit for the task.
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!