Question

For a function f(x,y), the gradient of ‘f’ at coordinates (x,y) is defined as a ___________

(a) 3-D row vector

(b) 3-D column vector

(c) 2-D row vector

(d) 2-D column vector

The question was asked in homework.

My doubt is from Sharpening Spatial Filters topic in portion Intensity Transformations and Spatial Filtering of Digital Image Processing

Answer 1

Right answer is (d) 2-D column vector

The best explanation: The gradient is a 2-D column vector.