Connecting edges detected by an edge detector

1. What does an edge detector do?
2. How can edge be detected?
3. What are the methods for edge linking and edge detection?
4. What is edge detection and line detection?

What does an edge detector do?

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.

How can edge be detected?

The search-based methods detect edges by first computing a measure of edge strength, usually a first-order derivative expression such as the gradient magnitude, and then searching for local directional maxima of the gradient magnitude using a computed estimate of the local orientation of the edge, usually the gradient ...

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.

What is edge detection and line detection?

Edge detection is the process of finding outlines in an image, whatever they look like. Line detection finds line segments (sometimes by extension, other geometric figures such as circular arcs).