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| Author: | Lu, D. Kiewit, D. |
| Title: | Passive People Meters: A First Step |
| Journal: | Journal of Advertising Research
1987 : JUNE/JULY, VOL. 27:3, p.9-14 |
| Index terms: | MEDIA RESEARCH AUTOMATION TELEVISION ADVERTISING |
| Language: | eng |
| Abstract: | Several automatic methods of counting people are discussed. The two physical sensing mechanisms are sonar and thermal infrared. The advantages of infrared over sonar are that the measurement process is quieter and the detector can be smaller and cheaper, though it sometimes counts excess people. |
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