Question

Based on the 4-directional code, the first difference of smallest magnitude is called as:

(a) Shape number

(b) Chain number

(c) Difference

(d) Difference number

I got this question by my college director while I was bunking the class.

My question is taken from Boundary Descriptors in division Representation and Description of Digital Image Processing

Answer 1

Right answer is (a) Shape number

The best explanation: We know that, the first difference of a chain coded boundary depends on the starting point. Based on such 4 directional boundary, the first difference of smallest magnitude is called as the shape number of the boundary.