Edge linking using local processing - why is this criterion imposed

1. What is edge linking using local processing?
2. What is edge linking why it is required in image segmentation?
3. Why edge detection is important in image processing?

What is edge linking using local processing?

Local edge linking methods usually start at some arbitrary edge point and consider points in a local neighbourhood for similarity of edge direction as shown in Fig. 29. Fig. Edge linking. If the points satisfy the similarity constraint then the points are added to the current edge set.

What is edge linking why it is required in image segmentation?

Edge detectors yield pixels in an image lie on edges. The next step is to try to collect these pixels together into a set of edges. Thus, our aim is to replace many points on edges with a few edges themselves.

Why edge detection is important in image processing?

Edge detection is an image processing technique for finding the boundaries of objects within images. It works by detecting discontinuities in brightness. Edge detection is used for image segmentation and data extraction in areas such as image processing, computer vision, and machine vision.