Segmentation and edge linking

1. What is edge segmentation?
2. How edge linking process is used to segment the image?
3. Is edge detection image segmentation?
4. What are the methods for edge linking and edge detection?

What is edge segmentation?

Edge-based segmentation relies on edges found in an image using various edge detection operators. These edges mark image locations of discontinuity in gray levels, color, texture, etc. When we move from one region to another, the gray level may change. So if we can find that discontinuity, we can find that edge.

How edge linking process is used to segment the image?

The Sobel technique of edge detection for image segmentation finds edges using Sobel approximation derivative [6]. It performs a 2-D spatial gradient measurement on an image and so emphasizes regions of high spatial gradient that corresponds to edges.

Is edge detection image segmentation?

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.

What are the methods for edge linking and edge detection?

Edge linking process takes an unordered set of edge pixels produced by an edge detector as an input to form an ordered list of edges. Local edge information are utilized by edge linking operation; thus edge detection algorithms typically are followed by linking procedure to assemble edge pixels into meaningful edges.