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Machine Vision, 3rd Edition by E. R. Davies

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Image Transformations

When setting up a measurement system, it is natural to calibrate it carefully before use. This task has been left to last because (1) it may be more mathematically daunting, (2) there are instances where it can be bypassed, and (3) it is not always possible to perform the calibration entirely in advance, but rather it has to be updated to a sufficient extent as measurements proceed. This chapter outlines some of the problems of calibration and some of the results of recent research that allow the process to be at least partially bypassed.

Look out for:

• the homogeneous coordinates technique for representing general 3-D positions and transformations.

• ‘extrinsic’ (external world) and ‘intrinsic’ (camera) parameters. ...

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