Why would one want the picture on the left rather than the one on the right? Doesn't a basic white outline on edges make sense?
mpotoole
One of the problems with the image on the right is that the edge is several pixels thick. Instead of a thick edge, we might actually be interested in a thin line.
This can be achieved by using the Laplacian of Gaussian filtering procedure depicted on the left. The zero crossing can be used to pinpoint the edge more accurately, and represents the location of the peak in the image on the right.
Why would one want the picture on the left rather than the one on the right? Doesn't a basic white outline on edges make sense?
One of the problems with the image on the right is that the edge is several pixels thick. Instead of a thick edge, we might actually be interested in a thin line.
This can be achieved by using the Laplacian of Gaussian filtering procedure depicted on the left. The zero crossing can be used to pinpoint the edge more accurately, and represents the location of the peak in the image on the right.