Relation To Gradients
In image processing, the computation of the local image gradient is a common operation, e.g., for edge detection. If above is an edge, then its gradient is parallel to . As is already discussed above the gradient is not a unique representation of orientation. Also, in the case of a local region which is centered on a line, the image gradient is approximately zero. However, in this case the vector is still well-defined except for its sign. Therefore, is a more appropriate starting point for defining local orientation than the image gradient.
Read more about this topic: Orientation (computer Vision)
Famous quotes containing the words relation to and/or relation:
“In relation to God, we are like a thief who has burgled the house of a kindly householder and been allowed to keep some of the gold. From the point of view of the lawful owner this gold is a gift; From the point of view of the burglar it is a theft. He must go and give it back. It is the same with our existence. We have stolen a little of God’s being to make it ours. God has made us a gift of it. But we have stolen it. We must return it.”
—Simone Weil (1909–1943)
“Any relation to the land, the habit of tilling it, or mining it, or even hunting on it, generates the feeling of patriotism. He who keeps shop on it, or he who merely uses it as a support to his desk and ledger, or to his manufactory, values it less.”
—Ralph Waldo Emerson (1803–1882)