Digital Image Processing with C++

6.Feature Extraction

Features play a central role in image processing. These numerical values, derived from direct calculations on the image, allow:

• to represent each pixel i by a vector xi∈ℝd, each of the components reflecting a feature relevant to the problem at hand;

• to detect points of interest in the image, for further processing (registration, matching, …).

We illustrate the first aspect in Sections 7.2 and 6.3. We focus on the second aspect in the two other sections of this chapter, and we more particularly search for particular geometric objects (points, shapes) in the image. First, we detail a method dedicated to the detection of points of interest and more particularly corners. Then we focus on a method for the detection of parametric ...