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. Author manuscript; available in PMC: 2007 Oct 18.
Published in final edited form as: IEEE Trans Med Imaging. 2003 Oct;22(10):1307–1318. doi: 10.1109/TMI.2003.818263

Fig. 1.

Fig. 1

The pinhole model. The camera or X-ray source forms the center of projection and the image plane is at z = d. The point q on the image plane represents the projection of the object point m (i, j, and k represent unit vectors in the x, y, and z directions).