Perception refers to the process and experience by which the raw sensation of our senses (such as sight and sound) becomon meaningful. AI tries to emulate these proceses in computer vision and natural languag eprocessing as low-level processing is sued to drive more semantic understanding. While it is easiest to thnk of a bottom up process from raw sensation to perception, in fact in human cognituon there are top-down processes at work, we see what we expewct to see, which can aid disambiguation, but also can have problems if high-level expectations become locked in. Computer perception also is most successful when there is a mix of bottom-up and top-down processes.
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