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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Harari, Daniel Ullman, Shimon Dorfman, Nimrod |
| Description | Author Affiliation: Ullman S ( Department of Mathematics and Computer Science, Weizmann Institute of Science, Rehovot 76100, Israel. shimon.ullman@weizmann.ac.il); |
| Abstract | Early in development, infants learn to solve visual problems that are highly challenging for current computational methods. We present a model that deals with two fundamental problems in which the gap between computational difficulty and infant learning is particularly striking: learning to recognize hands and learning to recognize gaze direction. The model is shown a stream of natural videos and learns without any supervision to detect human hands by appearance and by context, as well as direction of gaze, in complex natural scenes. The algorithm is guided by an empirically motivated innate mechanism--the detection of 'mover' events in dynamic images, which are the events of a moving image region causing a stationary region to move or change after contact. Mover events provide an internal teaching signal, which is shown to be more effective than alternative cues and sufficient for the efficient acquisition of hand and gaze representations. The implications go beyond the specific tasks, by showing how domain-specific 'proto concepts' can guide the system to acquire meaningful concepts, which are significant to the observer but statistically inconspicuous in the sensory input. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 44 |
| Volume Number | 109 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2012-11-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Visual Perception Task Performance And Analysis Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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