Special Imaging Techniques

This chapter presents four specific aspects of image processing. First, ways to characterize the
spatial resolution are discussed. This describes the minimum size an object must be to be seen
in an image. Second, the signal-to-noise ratio is examined, explaining how faint an object can
be and still be detected. Third, morphological techniques are introduced. These are nonlinear
operations used to manipulate binary images (where each pixel is either black or white). Fourth,
the remarkable technique of computed tomography is described. This has revolutionized medical
diagnosis by providing detailed images of the interior of the human body.
CHAPTER
Special Imaging Techniques
25

This chapter presents four specific aspects of image processing. First, ways to characterize the
spatial resolution are discussed. This describes the minimum size an object must be to be seen
in an image. Second, the signal-to-noise ratio is examined, explaining how faint an object can
be and still be detected. Third, morphological techniques are introduced. These are nonlinear
operations used to manipulate binary images (where each pixel is either black or white). Fourth,
the remarkable technique of computed tomography is described. This has revolutionized medical
diagnosis by providing detailed images of the interior of the human body.




Spatial Resolution
Suppose we want to compare two imaging s