When encountering something we are familiar with, the brain searches in the "registry". When a matching template is found, the brain no longer bothers about the details of the thing in front of it, but directly reports to the lower-level perception system that "this is the face "Next question", this is the "top-down" processing. When faced with new things, the brain cannot recognize the existing template, so it has to carefully process the things in front of it, and then combine the details, This constitutes the perception of new things. This is the "bottom-up" processing, which is more time-consuming and labor-intensive. Finally, the brain stores new things in the "registry" so that it can save time and effort in the "top" "Down" processing. This text mainly states:. ['The brain analyzes new things based on existing templates.', 'The brain has two distinct ways of processing information.', 'The brain is more inclined to process information "top-down".', "Familiarity with things affects people's visual perception."]