First is the process of retinal or visual processing. As you look at the person, the information enters your eyes; where it is taken apart and turned into millions of neural impulses that are sent to your brain.
Next is feature detection. As your brain buzzes with the activity, various areas focus on different aspects of the person's image.
Parallel processing is when the brain cell team process combined information about color, movement, form and depth.
Finally, the brain interprets the constructed image based on the information from previously stored images and recognizes it.
Check out these sensory integration tips to understand how the senses all work together shared by Indiana.edu.