Image Replacement essay

Research about  "Image Replacement Methods? What else was there other than FIR and what were their pros and cons" , and write a 1000 words essay about it. Make sure cite all sources.  

A good approach is to open with a statement regarding the topic and your opinion/exposure of the topic from before you did any research. Then identify the reasons this topic is important to this week's discussion, and if there are any opposing viewpoints. Then conclude with whether your opinion remains the same or has changed and why.