[IPOL announce] new preprint: A Review of Classic Edge Detectors

[announcements about the IPOL journal]

A new preprint is available in IPOL: http://www.ipol.im/pub/pre/35/

A Review of Classic Edge Detectors
by Haldo Spontón, Juan Cardelino

Abstract
In this paper some of the classic alternatives for edge detection in 
digital images are studied. The main idea behind edge detection is to 
find where abrupt changes in the intensity of an image have occurred. 
The first family of algorithms reviewed in this work uses the first 
derivative to find the changes of intensity, such as Sobel, Prewitt and 
Roberts. In the second reviewed family it is used second derivative, for 
example in algorithms like Marr-Hildreth and Haralick. Results obtained 
from a qualitative point of view (perceptual) and from a quantitative 
point of view (number of operations, execution time) are compared, 
considering different ways to convolve an image with a kernel (step 
required in some of the algorithms).