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1.	What is the equation used for calculating G value in terms of HSI components?(a) G=3I-(R+B)(b) G=3I+(R+B)(c) G=3I-(R-B)(d) G=2I-(R+B)I had been asked this question during an online interview.I want to ask this question from Color Models topic in division Color Image Processing of Digital Image Processing
Answer» RIGHT option is (a) G=3I-(R+B) For EXPLANATION I would SAY: Given VALUES of HSI in the interval [0, 1], the B value in the RGB components is given by the EQUATION: G=3I-(R+B).

2.	Which of the following color models are used for color printing?(a) RGB(b) CMY(c) CMYK(d) CMY and CMYKI had been asked this question in a job interview.Enquiry is from Color Models in division Color Image Processing of Digital Image Processing
Answer» Correct choice is (d) CMY and CMYK The explanation: The hardware oriented models which are PROMINENTLY used in the color printing PROCESS are CMY (cyan, MAGENTA and YELLOW) and CMYK (cyan, magenta, yellow and black).

3.	What is the equation used for calculating B value in terms of HSI components?(a) B=I(1+S)(b) B=S(1-I)(c) B=S(1+I)(d) B=I(1-S)This question was posed to me during an internship interview.Asked question is from Color Models in portion Color Image Processing of Digital Image Processing
Answer» The correct OPTION is (d) B=I(1-S) The best I can explain: Given values of HSI in the interval [0, 1], the B VALUE in the RGB components is given by the equation:B=I(1-S).

4.	What is the equation used for obtaining R value in terms of HSI components?(a) R=I[1-(S cos⁡H)/cos⁡(60°-H) ].(b) R=I[1+(S cos⁡H)/cos(120°-H)].(c) R=I[1+(S cos⁡H)/cos⁡(60°-H) ].(d) R=I[1+(S cos⁡H)/cos(30°-H) ].The question was posed to me by my school teacher while I was bunking the class.The query is from Color Models topic in section Color Image Processing of Digital Image Processing
Answer» Correct CHOICE is (c) R=I[1+(S cos⁡H)/cos⁡(60°-H) ]. Explanation: GIVEN values of HSI in the interval [0, 1], the R value in the RGB components is given by the equation:

5.	What is the equation used to obtain I(Intensity) component of each RGB pixel in RGB color format?(a) I=1/2(R+G+B)(b) I=1/3(R+G+B)(c) I=1/3(R-G-B)(d) I=1/3(R-G+B)I had been asked this question in homework.This question is from Color Models topic in division Color Image Processing of Digital Image Processing
Answer» The CORRECT ANSWER is (b) I=1/3(R+G+B) To elaborate: If an IMAGE is GIVEN in RGB format then the intensity (I) component is OBTAINED by the equation, I=1/3 (R+G+B).

6.	What is the equation used to obtain S component of each RGB pixel in RGB color format?(a) S=1+3/(R+G+B) [min⁡(R,G,B)].(b) S=1+3/(R+G+B) [max⁡(R,G,B)].(c) S=1-3/(R+G+B) [max⁡(R,G,B)].(d) S=1-3/(R+G+B) [min⁡(R,G,B)].The question was posed to me by my college director while I was bunking the class.Question is from Color Models topic in chapter Color Image Processing of Digital Image Processing
Answer» RIGHT OPTION is (d) S=1-3/(R+G+B) [min⁡(R,G,B)]. The EXPLANATION is: If an image is given in RGB format then the saturation component is obtained by the equation.

7.	How many bit RGB color image is represented by full-color image?(a) 32-bit RGB color image(b) 24-bit RGB color image(c) 16-bit RGB color image(d) 8-bit RGB color imageThe question was asked in quiz.Asked question is from Color Models in chapter Color Image Processing of Digital Image Processing
Answer» Right CHOICE is (b) 24-bit RGB color IMAGE Explanation: The term full-color image is used often to denote a 24-bit RGB color image. The TOTAL number of colors in a 24-bit RGB color image is (2^8)^3=16777216.

8.	What do you mean by the term pixel depth?(a) It is the number of bits used to represent each pixel in RGB space(b) It is the number of bytes used to represent each pixel in RGB space(c) It is the number of units used to represent each pixel in RGB space(d) It is the number of mm used to represent each pixel in RGB spaceI got this question during an online interview.Origin of the question is Color Models in section Color Image Processing of Digital Image Processing
Answer» The correct OPTION is (a) It is the number of bits used to represent each pixel in RGB space To explain: Images are represented in the RGB color model CONSIST of three COMPONENT images one for each primary color. When fed into RGB monitor, these three images COMBINE on the phosphor screen to produce a composite color image. The number of bits used to represent each pixel in RGB space is called the pixel depth.

9.	What is the name of area of the triangle in C.I E chromatic diagram that shows a typical range of colors produced by RGB monitors?(a) Color gamut(b) Tricolor(c) Color game(d) Chromatic colorsI got this question in homework.Query is from Color Fundamentals topic in portion Color Image Processing of Digital Image Processing
Answer» RIGHT answer is (a) Color gamut To explain: The triangle in C.I.E chromatic diagram SHOWS a typical range of colors called the color gamut produced by RGB monitors. The IRREGULAR region inside the triangle is REPRESENTATIVE of the color gamut of today’s high-quality color printing devices.

10.	Color model is also named as (another name):(a) Color space(b) Color gap(c) Color space & color system(d) Color systemI got this question during an online interview.I'd like to ask this question from Color Models topic in section Color Image Processing of Digital Image Processing
Answer» CORRECT choice is (c) Color space & color system The explanation is: A color model is also CALLED as color space or color system .Its purpose is to FACILITATE the specification of colors in some standard, generally accepted way.

11.	What is the value obtained by the sum of the three trichromatic coefficients?(a) 0(b) -1(c) 1(d) NullThis question was addressed to me in an internship interview.Enquiry is from Color Fundamentals in chapter Color Image Processing of Digital Image Processing
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12.	What do you mean by tri-stimulus values?(a) It is the amount of red, green and yellow needed to form any particular color(b) It is the amount of red, green and indigo needed to form any particular color(c) It is the amount of red, yellow and blue needed to form any particular color(d) It is the amount of red, green and blue needed to form any particular colorI have been asked this question at a job interview.I would like to ask this question from Color Fundamentals topic in portion Color Image Processing of Digital Image Processing
Answer» Correct ANSWER is (d) It is the amount of red, green and blue needed to form any particular COLOR Explanation: The amounts of red, green and blue needed to form any particular color are CALLED the tri-stimulus values and are denoted by X, Y and Z respectively. A color is then specified by its TRICHROMATIC coefficients, whose equations are formed from tri-stimulus values.

13.	Which of the following represent the correct equations for trichromatic coefficients?(a) x=X/(X+Y+Z), y=Y/(X+Y+Z), z=Z/(X+Y+Z)(b) x=(Y+Z)/(X+Y+Z), y=(X+Z)/(X+Y+Z), z=(X+Y)/(X+Y+Z)(c) x=X/(X-Y+Z), y=Y/(X-Y+Z), z=Z/(X-Y+Z)(d) x=(-X)/(X+Y+Z), y=(-Y)/(X+Y+Z), z=(-Z)/(X+Y+Z)This question was addressed to me by my school principal while I was bunking the class.My enquiry is from Color Fundamentals in portion Color Image Processing of Digital Image Processing
Answer» CORRECT answer is (a) X=X/(X+Y+Z), y=Y/(X+Y+Z), z=Z/(X+Y+Z) Explanation: Tri-stimulus values are the amounts of red, green and blue NEEDED to form any particular color and they are denoted as X,Y and Z respectively. A colors the SPECIFIED by its trichromatic coefficients x, y & z: =X/(X+Y+Z), y=Y/(X+Y+Z), z=Z/(X+Y+Z).

14.	What is the quantity that is used to measure the total amount of energy flowing from the light source?(a) Brightness(b) Intensity(c) Luminence(d) RadianceI got this question in my homework.I'd like to ask this question from Color Fundamentals topic in portion Color Image Processing of Digital Image Processing
Answer» Correct CHOICE is (d) Radiance The explanation is: THREE quantities are used to describe the quality of a CHROMATIC light source: radiance, luminance and brightness. Radiance is used to measure the total amount of energy flows from the light source and is generally measured in watts (W).

15.	What are the characteristics that are used to distinguish one color from the other?(a) Brightness, Hue and Saturation(b) Hue, Brightness and Intensity(c) Saturation, Hue(d) Brightness, Saturation and IntensityI got this question in class test.My enquiry is from Color Fundamentals topic in chapter Color Image Processing of Digital Image Processing
Answer» Right choice is (a) Brightness, Hue and Saturation Explanation: The characteristics generally USED to DISTINGUISH one COLOR from another are brightness, hue and saturation. Brightness embodies the CHROMATIC notion of INTENSITY. Hue is an attribute associated with dominant wavelength in a mixture of light waves. Saturation refers to the relative purity or the amount of white light mixed with a hue.

16.	What are the characteristics that are taken together in chromaticity?(a) Saturation and Brightness(b) Hue and Saturation(c) Hue and Brightness(d) Saturation, Hue and BrightnessI have been asked this question by my college director while I was bunking the class.This interesting question is from Color Fundamentals topic in portion Color Image Processing of Digital Image Processing
Answer» Correct OPTION is (b) Hue and SATURATION Best explanation: Hue and saturation are TAKEN together are CALLED chromaticity and THEREFORE, a color may be characterized by its brightness and chromaticity.

17.	What are the basic quantities that are used to describe the quality of a chromatic light source?(a) Radiance, brightness and wavelength(b) Brightness and luminence(c) Radiance, brightness and luminence(d) Luminence and radianceI have been asked this question by my college professor while I was bunking the class.The question is from Color Fundamentals in portion Color Image Processing of Digital Image Processing
Answer» RIGHT ANSWER is (c) Radiance, brightness and luminence Easiest explanation: Three quantities are USED to describe the quality of a CHROMATIC light SOURCE: radiance, luminance and brightness.

18.	What are the names of categories of color image processing?(a) Full-color and pseudo-color processing(b) Half-color and full-color processing(c) Half-color and pseudo-color processing(d) Pseudo-color and Multi-color processingThis question was posed to me during an online exam.Question is taken from Color Fundamentals in portion Color Image Processing of Digital Image Processing
Answer» Right choice is (a) Full-color and pseudo-color processing To EXPLAIN I would say: Color image processing is divided into two major areas: full-color and pseudo-color processing. In the FIRST category, the images are acquired with a full-color sensor like color TV or color scanner. In the SECOND category, there is a problem of assigning a color to a particular monochrome INTENSITY or range of intensities.

19.	How many categories does the color image processing is basically divided into?(a) 4(b) 2(c) 3(d) 5I had been asked this question during an interview.I want to ask this question from Color Fundamentals topic in division Color Image Processing of Digital Image Processing
Answer» Correct CHOICE is (b) 2 The explanation: Color image PROCESSING is DIVIDED into TWO MAJOR areas: full-color and pseudo-color processing.