A Review of Literature on Edge Detection Techniques

Edge detection is a fundamental tool used in most image processing applications to obtain information from the frames as a precursor step to feature extraction and object segmentation. This process detects outlines of an object and boundaries between objects and the background in the image. Edge is a boundary between two homogeneous regions. Edge detection refers to the process of identifying and locating sharp discontinuities in an image. Edge detection is an important pre-processing step for any image processing application, object recognition and object detection. This paper reviews the literature on edge detection. Literature Review indicates that several works has been done in the field of edge detection. The work carried out by different researchers includes comparison of various edge detection techniques, various image segmentation techniques, improved versions of edge detectors etc.