Question

How is sampling been done when an image is generated by a single sensing element combined with mechanical motion?

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

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

(c) The number of mechanical increments when the sensor is activated to collect data.

(d) None of the mentioned.

This question was addressed to me in a national level competition.

My question is taken from Basics Of Image Sampling & Quantization in portion Digital Image Fundamentals of Digital Image Processing

Answer 1

Right choice is (c) The number of mechanical increments when the sensor is activated to collect data.

The explanation: When an image is generated by a single sensing element along with mechanical motion, the output data is quantized by dividing the gray-level scale into many discrete levels. However, sampling is done by selecting the number of individual mechanical increments recorded at which we activate the sensor to collect data.