well, you cannot call it embedded system.
image processing can be some application in the Embedded System, but that will be a lot of difference with your work in personal computer. The difference will be in the computation power, instruction set and compiler, etc. So if you want to implement the image processing in the embedded system, lots of work are needed. You can find the compiler for your target embedded processor and estimate the CPU load, then you will have a better understanding on it.