Image Processing in the Spatial Domain

Question 1

Edge

Answer 1

change of intensity

Question 2

edge detectors

Answer 2

calculates the strength of intensity change and its direction

Question 3

Magnitude of Gradient > Threshold

Answer 3

edge point

Question 4

operator masks

Answer 4

gives a zero response in an area of constant intensity

Question 5

sobel operator

Answer 5

spatial gradient measure on an image that emphasizes edges (high spatial frequency); used to find the approximate absolute gradient magnitude at each point in an input grayscale image

Question 6

laplacian operator

Answer 6

derivative operator used to find edges in an image; the only second order derivative mask for other edge operators