When we encounter something we are familiar with, the brain will search in the Registry. When we find a matching template, the brain will no longer bother to tangle with the details of the thing in front of us, but directly inform the lower perceptual system that this is a face, the next problem, which is a top-down process. When facing a new thing, the brain cannot identify it against the existing template. They have to carefully process the things in front of them, and then combine the details to form the perception of new things. This is the bottom-up processing, which is more time-consuming and laborious. Finally, the brain will store new things in the Registry, so that the top-down processing can save time and effort next time.
mainly explained in the above text?
The brain has two distinct ways of processing information.