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Calibration of a projective camera is the process of determining an adjustment on the camera so that, after adjustment, it follows the pinhole or perspective projection model.
Background
A projective camera follows pinhole or perspective projection, which is also known as rectilinear projection because straight lines in a scene remain straight in an image. A real camera usually uses lenses with finite aperture, especially for low-end cameras (such as WebCams) or wide-angle cameras. Lens distortion also arises from imperfect lens design and manufacturing, as well as camera assembly. A line in a scene is not seen as a line in the image. A point in 3D space, its corresponding point in image, and the camera’s optical center are not collinear. The linear projective equation is sometimes not sufficient, and lens distortion has to be considered or...
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References
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Zhang, Z. (2014). Calibration of Projective Cameras. In: Ikeuchi, K. (eds) Computer Vision. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-31439-6_163
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DOI: https://doi.org/10.1007/978-0-387-31439-6_163
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