Geometric Calibration of Micro-Lens-Based Light-Field Cameras Using Line Features^*

Yunsu Bok, Hae-Gon Jeon, and In So Kweon

Abstract. We present a novel method of geometric calibration of micro-lens-based light-field cameras. Accurate geometric calibration is a basis of various applications. Instead of using sub-aperture images, we utilize raw images directly for calibration. We select proper regions in raw images and extract line features from micro-lens images in those regions. For the whole process, we formulate a new projection model of micro-lens-based light-field cameras. It is transformed into a linear form using line features. We compute an initial solution of both intrinsic and extrinsic parameters by a linear computation, and refine it via a non-linear optimization. Experimental results show the accuracy of the correspondences between rays and pixels in raw images, estimated by the proposed method.

Keywords: Calibration, plenoptic, light-field cameras

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LNCS 8694, p. 47 ff.

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