Two-Dimensional Measurements (Part 1)

Shapes in two-dimensional digitized images may be interpreted in a wide variety of ways. In some applications, they are projections of three-dimensional objects, whereas in others they may be sections through them. This latter case includes elevation profiles across surfaces, as can be provided by devices such as scanning profilometers. Such profiles (and the variety of devices used to obtain them) are particularly important in industrial quality control, where they are used to measure the flatness and roughness of surfaces, the roundness of objects, and so on. The interpretation of these surface profiles is considered in Chapter 5, since they generally arise in efforts to understand the shape of three-dimensional ...

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