A Unified Linear Camera Calibration Method Using Two Parallel Calibration Planes

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  • Unified Linear Camera Calibration Metho

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In this paper, we examine the two plane camera calibration model in terms of perspective mapping, and present a new effective camera calibration method by taking the advantage of the conventional method and modifying it based on the exact perspective imaging. It also takes the advantage that each of intrinsic and extrinsic camera parameters can be obtained by solving linear equations only. So that the solutions will be provided uniquely and stably under some conditions, and which can be definitely specified.<br>In our method a priori knowledge on camera intrinsic parameters is only physical pixel sizes. Exact focal length of the lens, the position of image center or optical center, and the camera pose are unknown and to be calibrated. This is a practical assumption for common commercial TV camera systems.<br>For the cases where non-linear lens distortions must be taken into account, our method can be extended and their parameters are calibrated also using only linear solutions.<br>It is shown that higher performance and accurate calibration can be achieved by this method theoretically and experimentally.

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