The Extraction of Camera Parameters using Projective Invariance for Virtual Studio


The Transactions of the Korea Information Processing Society (1994 ~ 2000), Vol. 6, No. 9, pp. 2540-2547, Sep. 1999
10.3745/KIPSTE.1999.6.9.2540,   PDF Download:

Abstract

Chromakey method is one of key technologies for realizing virtual studio, and the blue portions of a captured image in virtual studio, are replaced with a computer generated or real image. The replaced image must be changed according to the camera parameter of studio for natural merging with the non-blue portions of a captured image. This paper proposes a novel method to extract camera parameters using the recognition of pentagonal patterns that are painted on a blue screen. We extract corresponding points between a blue screen and a captured image using the projective invariant features of a pentagon. Then, calculate camera parameters using corresponding points by the modification of Tsai's method. Experimental results indicate that the proposed method is more accurate compared to conventional method and can process about twelve frames of video per a second in Pentium-MMX processor with CPU clock of 166MHz.


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Cite this article
[IEEE Style]
H. S. Won, E. K. Bae, L. J. Whaon, "The Extraction of Camera Parameters using Projective Invariance for Virtual Studio," The Transactions of the Korea Information Processing Society (1994 ~ 2000), vol. 6, no. 9, pp. 2540-2547, 1999. DOI: 10.3745/KIPSTE.1999.6.9.2540.

[ACM Style]
Han Seo Won, Eum Kyoung Bae, and Lee Joon Whaon. 1999. The Extraction of Camera Parameters using Projective Invariance for Virtual Studio. The Transactions of the Korea Information Processing Society (1994 ~ 2000), 6, 9, (1999), 2540-2547. DOI: 10.3745/KIPSTE.1999.6.9.2540.