Multiple Choice Question Bank Subject: DIVP
Unit-1
1.
2. In a digital Image, the spatial coordinate (x,y) are proportional to
a) Contrast
b) Brightness
c) Noise
d) Position
3. The smallest element in a given image, is called as
a) Dot
b) Byte
c) Bit
d) Pixel
4. Total number of Intensity levels in an 8 bit image are
a) 127
b) 128
c) 256
d) 258
5. A pixel p at coordinates (x,y) has four horizontal and vertical neighbours whose coordinates
are given by
a) (x+1,y)(x-1,y)(x,y+1)(x,y-1)
b) (x+1,y+1)(x-1,y)(x-1,y+1)(x,y-1)
c) (x,y)(x-1,y-1)(x,y+1)(x+1,y-1)
d) (x+1,y)(x-1,y-1)(x,y+1)(x,y)
6. What is digital image?
a) When x,y,and the amplitude e values of a real l finite, discrete quantities,wec all the imge a
digital image.
b) Whenx,y,andtheamplitudevaluesofarealinfinite,discretequantitie is thedigitalimage.
c) a &b
d) None ofthese
7. What is pixel?
a) Pixel is the elements of a digital image
b) Pixel is the elements of a analogimage
c) a &b
d) none ofthese
8. First application of digital image was inthe:
a) Newspaperindustry
b) Communicationsystem
c) a &b
d) None ofthese
9. In which technique which is used to determine changes between two images?
a) Image differencing
b) segmentation
c) skin textureanalysis
d) imagedifferencing
10. The initial step in any image processing techniqueis
a) segmentation
b) masking
c) image acquisition
d) normalization
11. What is brightnessadaption?
a. For a given set of conditions, the current sensitivity level of the visualsystem.
b. For a given set of conditions, the current sensitivity level of the in-visualsystem.
c) a &b
d) None
12. What is spatialresolution?
a. it‘s the largest discernible detail in an image.
b. it‘s the smallest discernible detail in animage.
c) a &b
d) None
13. The spatial domain refers:
a. Totheimageplaneitself,andapproachesinthiscategoryarebasedonindirectmanipulationof pixels in animage.
b. Totheimageplaneitself,andapproachesinthiscategoryarebasedondirectmanipulationof pixels in animage.
c) a &b
d) None
13 The area in which the receptors are absent is called
(A) fovea
(B) rods
(C) hot spot
(D) blind spot
Ans: D blind spot
14. 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 image
Answer: b
15. 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)
Answer: b
HSI color model stands for
a.hue, system, intensity
b.hue, saturation, intensity
c.high, saturation, intensity
d.high, system, intensity
Answer: (b).hue, saturation, intensity
16. Tri-chromatic color mixing theory is
a. any color can be obtained by mixing of three secondary colors with a rightproportion.
b. any color can be obtained by mixing of three primary colors with a rightproportion.
c. a &b
d. none ofabove
17. Principal sensing categories ineyes
a. Red light 65%, green light 33%, and blue light2%
b. Yellow light 65%, green light 33%, and blue light2%
c. Red light 65%, green light 33%, and cyan light2%
d. none ofabove
18. Secondarycolors:
a. G+Y=Cyan, R+G=Yellow,R+B=Magenta
b. G+B=Cyan, R+G=Yellow,R+B=Magenta
c. G+B=Cyan, R+G=Yellow,R+B=Magenta
d. none ofabove
19. below figureshows:
a. additive primaries
b. subtractive primaries
c. a &b
d. none of above
20. HIS Model
a. match the human description
b. match the animal description
c. match the cat description
d. none of above
21. The number of bits used to represent each pixel in RGBspace.
a. Pixel depth
b. no. ofpixel
c. pixelsize
d. none ofabove
22. Which of the following is/are more commercially successful image enhancement method in mask mode
radiography, an area under medical imaging?
a) Addition
b) Subtraction
c) Multiplication
d) Division
Answer: (b).Subtraction
23. Which of the following operations are used for masking?
a) AND, OR
b) AND, NOT
c) NOT, OR
d) All of the mentioned
Answer: c
24. What is the equivalent for a black, 8-bit pixel to be processed under logic operation on gray scale image?
a) A string: 00000000
b) A string: 11111111
c) A string: 10000000
d) A string: 01111111
Answer: a
25. Which of the following arithmetic operator is primarily used as a masking operator in enhancement?
a) Addition
b) Subtraction
c) Multiplication
d) Division
Answer: c
