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51.	The resulting image of sampling and quantization is considered a matrix of real numbers. By what name(s) the element of this matrix array is called __________(a) Image element or Picture element(b) Pixel or Pel(c) All of the mentioned(d) None of the mentionedI have been asked this question during a job interview.The above asked question is from Representing Digital Images in section Digital Image Fundamentals of Digital Image Processing
Answer» The correct CHOICE is (c) All of the mentioned For EXPLANATION: Sampling and Quantization of an image f(x, y) forms a MATRIX of real numbers and each element of this matrix array is commonly known as Image element or PICTURE element or Pixel or Pel.

52.	Assume that an image f(x, y) is sampled so that the result has M rows and N columns. If the values of the coordinates at the origin are (x, y) = (0, 0), then the notation (0, 1) is used to signify :(a) Second sample along first row(b) First sample along second row(c) First sample along first row(d) Second sample along second rowI have been asked this question in my homework.I'm obligated to ask this question of Representing Digital Images in chapter Digital Image Fundamentals of Digital Image Processing
Answer» CORRECT CHOICE is (a) Second sample along first row To explain I would say: The values of the coordinates at the origin are (x, y) = (0, 0). Then, the next COORDINATE values (second sample) along the first row of the image are represented as (x, y) = (0, 1).

53.	The quality of a digital image is well determined by ___________(a) The number of samples(b) The discrete gray levels(c) All of the mentioned(d) None of the mentionedI got this question in a national level competition.Query is from Basics Of Image Sampling & Quantization in portion Digital Image Fundamentals of Digital Image Processing
Answer» Right CHOICE is (c) All of the mentioned Easy explanation: The quality of a digital image is DETERMINED mostly by the number of samples and discrete GRAY LEVELS USED in sampling and quantization.

54.	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 mentionedThis 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» 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.

55.	How does sampling gets accomplished with a sensing strip being 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 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 mentionedThis question was posed to me in an interview for internship.The doubt is from Basics Of Image Sampling & Quantization in portion Digital Image Fundamentals of Digital Image Processing
Answer» RIGHT answer is (a) The number of sensors in the strip establishes the sampling LIMITATIONS in one image direction and MECHANICAL motion in the other direction The best I can explain: When a sensing strip is used the number of sensors in the strip defines the sampling limitations in one direction and mechanical motion in the other direction.

56.	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» 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.

57.	For a continuous image f(x, y), Quantization is defined as(a) Digitizing the coordinate values(b) Digitizing the amplitude values(c) All of the mentioned(d) None of the mentionedI got this question during an online interview.I'd like to ask this question from Basics Of Image Sampling & Quantization topic in portion Digital Image Fundamentals of Digital Image Processing
Answer» The correct choice is (B) DIGITIZING the amplitude VALUES Easiest explanation: Sampling is the METHOD of digitizing the amplitude values of the image.

58.	Validate the statement:(a) , to sample the function we take equally spaced samples, superimposed on the function, along a horizontal line. However, the sample values still span (vertically) a continuous range of gray-level values. So, to convert the given function into a digital function, the gray-level values must be divided into various discrete levels.”(b) True(c) FalseI had been asked this question in homework.This intriguing question originated from Basics Of Image Sampling & Quantization topic in section Digital Image Fundamentals of Digital Image Processing
Answer» Right answer is (a) , to sample the function we take equally spaced samples, superimposed on the function, along a horizontal LINE. However, the sample VALUES still span (vertically) a continuous range of gray-level values. So, to convert the given function into a digital function, the gray-level values must be divided into various DISCRETE levels.” For EXPLANATION I would say: Digital function requires both sampling and quantization of the one-dimensional image function.

59.	For a continuous image f(x, y), how could be Sampling defined?(a) Digitizing the coordinate values(b) Digitizing the amplitude values(c) All of the mentioned(d) None of the mentionedThis question was addressed to me by my school teacher while I was bunking the class.The origin of the question is Basics Of Image Sampling & Quantization topic in section Digital Image Fundamentals of Digital Image Processing
Answer» Right OPTION is (a) Digitizing the coordinate VALUES Easy explanation: Sampling is the METHOD of digitizing the coordinate values of the image.

60.	To convert a continuous image f(x, y) to digital form, we have to sample the function in __________(a) Coordinates(b) Amplitude`(c) All of the mentioned(d) None of the mentionedThe question was posed to me in an international level competition.Question is from Basics Of Image Sampling & Quantization topic in division Digital Image Fundamentals of Digital Image Processing
Answer» The correct OPTION is (C) All of the mentioned Easy EXPLANATION: An image may be CONTINUOUS in the X- and y-coordinates or in amplitude, or in both.

61.	To convert a continuous sensed data into Digital form, which of the following is required?(a) Sampling(b) Quantization(c) Both Sampling and Quantization(d) Neither Sampling nor QuantizationThe question was posed to me in an international level competition.My doubt is from Basics Of Image Sampling & Quantization topic in chapter Digital Image Fundamentals of Digital Image Processing
Answer» The correct choice is (c) Both SAMPLING and Quantization The explanation: The OUTPUT of the most sensor is a continuous waveform and the AMPLITUDE and spatial behavior of such waveform are RELATED to the physical phenomenon being SENSED.