Digital Image Processing
The electronic camera/frame grabber/computer combination has made it easy to digitize, store and manipulate images. These possibilities have made a great impact on optical metrology in recent years. Digital image processing has evolved as a speciﬁc scientiﬁc branch for many years. Many of the methods and techniques developed here are directly applicable to problems in optical metrology. In this chapter we go through some of the standard methods such as edge detection, contrast stretching, noise suppression, etc. Besides, algorithms for solving problems speciﬁc for optical metrology are needed. Such methods will be treated in Chapter 11.