What is the meaning of implicit perception?

"Implicit" perception is perception in the absence of awareness. Freud, for instance, believed that we could have unconscious perceptions, and that one goal of psychoanalysis was to make these perceptions "explicit" or conscious so that we could react to them in a more logical and reasonable manner. Advertising is another area in which implicit perception has been of interest. The idea is that you would, for instance, buy more of a product if you "saw" it (or smelled it, or heard it, etc...) unconsciously, without realizing it, possibly because you would react to the perception impulsively and non-rationally rather than subjecting the idea of obtaining the product to any kind of reasoning process. There used to be a rumor- I do not know if this was urban myth or reality, and perhaps someone else would like to comment on that- that alcohol advertisers used to draw ice cubes in their visual adds so that the ice cubes contained subtle images of naked bodies that the consumer would not notice consciously, but would react to emotionally, causing them to buy the product because of the association of the product with the instinctual interest in sex.