Fourier descriptor

1. What is Fourier descriptor?
2. What is a shape descriptor?
3. What is boundary descriptors in digital image processing?

What is Fourier descriptor?

Fourier descriptors are derived from the Fourier series for the cumulative angular function of the cross-sectional boundary and are used to characterize shape complexity and other geometric attributes. Moreover, image-processing-based methods have been used for identifying different types of fibres in cross-section.

What is a shape descriptor?

Shape descriptors are mathematical functions which are applied to an image and produce nu- merical values which are representative of a particular characteristic of the image. These numerical values can then be processed in order to provide some information about the image.

What is boundary descriptors in digital image processing?

BOUNDARY DESCRIPTORS. Simple Descriptors. q Length of a Contour. By counting the number of pixels along the contour. For a chain coded curve with unit spacing in both directions, the number of vertical and horizontal components plus 21/2 times the number of components give the exact length of curve.