Detection of macroscopic features is an important part of image analysis and visual pattern recognition. Of particular interest is the identification of straight lines in images, as these are ubiquitous—appearing both on manufactured parts and in the built environment. The Hough transform provides the means for locating these features highly robustly in digital images. This chapter describes the processes and principles needed to locate the features in this way.
Look out for:
• the basic Hough transform technique for locating straight lines in images.
• an alternative approach called the foot-of-normal method.
• how lines can be localized along their length.
• how final line fitting can be made more accurate.
• why the Hough ...