Study of Zooming Measurement Method and Analysis of Zooming Work while Shooting Still Subject by Broadcasting Cameramen

• Published in: Eizō Jōhō Media Gakkaishi Vol. 53; no. 5; pp. 749 - 757
• Main Authors: Shimoda, Shigeru, Tsuda, Takao, Ishikawa, Akio, Kato, Daiichiro, Yamada, Mitsuho, Abe, Kazuo, Fukushima, Hiroshi
• Format: Journal Article
• Language: English; Japanese
• Published: The Institute of Image Information and Television Engineers 1999
• ISSN: 1342-6907; 1881-6908
• DOI: 10.3169/itej.53.749

We are studying an intelligent robot camera that can shoot automatically as well as a human broadcast cameraman can. To elucidate a cameraman's zooming techniques, we recently examined our measurement methods and conducted a basic experiment while shooting still subjects. The results showed that our measurement methods were effective in faithfully gauging zooming characteristics. Furthermore, analyses of zooming actions revealed that, in the case of repeated shooting of the same scene, the velocity of the operating rod always followed almost the same shaped zooming velocity curve, and that the rates of size change of the subject for normalized zooming times were 0.62-0.91 (second half) in the zooming-in operation and 0.17-0.44 (first half) in the zooming-out operation.