Question

How is sampling accomplished when a sensing array is used for image acquisition?

(a) The number of sensors in the strip establishes the sampling limitations in one image direction and Mechanical motion in the other direction

(b) The number of sensors in the sensing array defines the limits of sampling in both directions

(c) The number of mechanical increments at which we activate the sensor to collect data

(d) None of the mentioned

This question was addressed to me by my school teacher while I was bunking the class.

This intriguing question originated from Basics Of Image Sampling & Quantization in chapter Digital Image Fundamentals of Digital Image Processing

Answer 1

The correct answer is (b) The number of sensors in the sensing array defines the limits of sampling in both directions

The best I can explain: When we use sensing array for image acquisition, there is no motion and so, only the number of sensors in the array defines the limits of sampling in both directions and the output of the sensor is quantized by dividing the gray-level scale into many discrete levels.