Fastest Algorithm for Distance Transform

1. How do you calculate D4 distance?
2. What is Euclidean distance transform?
3. What is distance transform in cv2?

How do you calculate D4 distance?

D4(City Block distance): |1-2| +|1-2| =2 D8(chessboard distance ) : max(|1-2|,|1-2|)= 1 (because it is one of the 8-neighbors ) Hanan Hardan 17 Page 18 Distance measures Example : Use the city block distance to prove 4- neighbors ?

What is Euclidean distance transform?

The distance transform (DT) is a general operator forming the basis of many methods in computer vision and geometry, with great potential for practical applications. However, all the optimal algorithms for the computation of the exact Euclidean DT (EDT) were proposed only since the 1990s.

What is distance transform in cv2?

The function cv. distanceTransform calculates the approximate or precise distance from every binary image pixel to the nearest zero pixel. For zero image pixels, the distance will obviously be zero.