Abstract :
Edge detection appreciably preserves the
important structural properties in an image and filters out
unwanted information while reducing the amount of data.
Edges outline the boundaries and are therefore a problem
of fundamental importance in image processing of
biomedical signals. The method used in this paper is to
detect the tumor boundaries in the MRI image using
various edge detection techniques. The result of this
method makes very clear for physician to distinguish the
tumor portion for surgical planning. It has been shown that
with proper selection of the threshold value of the image
the filters gives better result in terms of edge and PSNR for
a given image .It has been shown that Canny’s edge
detection algorithm performs better than all other operators
under almost all scenarios. Experimental results presented
in this paper are obtained by using MATLAB.
Keyword :
Edge detection, Prewitt, Robert, Sobel, Canny