• KSII Transactions on Internet and Information Systems
    Monthly Online Journal (eISSN: 1976-7277)

Geometric Image Compensation Method for a Portable Projector Based on Rewarping Using 2D Homography

Vol. 7, No.9, September 30, 2013
10.3837/tiis.2013.09.013, Download Paper (Free):

Abstract

As portable multimedia devices become more popular and smaller, the use of portable projectors is also rapidly increasing. However, when portable projectors are used in mobile environments in which a dedicated planar screen is not available, the problem of geometric distortion of the projected image often arises. In this paper, we present a geometric image compensation method for portable projectors to compensate for geometric distortions of images projected on various types of planar or nonplanar projection surfaces. The proposed method is based on extraction of the two-dimensional (2D) geometric information of a projection area, setting of the compensation area, and prewarping using 2D homography. The experimental results show that the proposed method allows effective compensation for waved and arbitrarily shaped projection areas, as well as tilted and bent surfaces that are often found in the mobile environment. Furthermore, the proposed method is more computationally efficient than conventional image compensation methods that use 3D geometric information.


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Cite this article

[IEEE Style]
Jinsoo Cho, Jongkil Won and Jongwoo Bae, "Geometric Image Compensation Method for a Portable Projector Based on Rewarping Using 2D Homography," KSII Transactions on Internet and Information Systems, vol. 7, no. 9, pp. 2299-2311, 2013. DOI: 10.3837/tiis.2013.09.013

[ACM Style]
Cho, J., Won, J., and Bae, J. 2013. Geometric Image Compensation Method for a Portable Projector Based on Rewarping Using 2D Homography. KSII Transactions on Internet and Information Systems, 7, 9, (2013), 2299-2311. DOI: 10.3837/tiis.2013.09.013