Digital Image Processing

Syllabus :: Digital Image Processing (RCS-082)

Unit I 





Advance Study in DIP

Recent Trends in Digital Image Processing

Notes on Color Pattern (RGB, CMY, HSI)

Sample Paper Quiz Image Processing RCS082

Previous Year Question Paper:

1. DIGITAL-IMAGE-PROCESSING-NCS-801 2018_19
2. DIGITAL-IMAGE-PROCESSING-NCS801 2017_18
3. DIGITAL-IMAGE-PROCESSING-NCS801 2016_17

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Image Segment by Morphological Algorithm Image Processing Unit 4 Part 1

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Hoge Detection Image Processing Unit 4 Part 2

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Image Segment by Morphological Algorithm: Image Processing Unit 4 Part 3

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Image Segment by Dam Construction: Image Processing Unit 4 Part 4

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Quiz 1

1. 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 Quantization

Answer (c)

2. 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 mentioned

Answer (c)

3. 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 mentioned

Answer (c)

4. A continuous image is digitised at _______ points.

a) random

b) vertex

c) contour

d) sampling

Answer (d)

5. What is the first and foremost step in Image Processing?

a) Image restoration

b) Image enhancement

c) Image acquisition

d) Segmentation

Answer (c)

6. How many number of steps are involved in image processing?

a) 10

b) 9

c) 11

d) 12

Answer (a)

Quiz 2

1. How is array operation carried out involving one or more images?
a) array by array
b) pixel by pixel
c) column by column
d) row by row
Answer: b

2. Enhancement of differences between images is based on the principle of ____________
a) Additivity
b) Homogeneity
c) Subtraction
d) None of the Mentioned
Answer: c

3. If every element of a set A is also an element of a set B, then A is said to be a _________ of set B.
a) Disjoint set
b) Union
c) Subset
d) Complement set
Answer: c

4. Image processing approaches operating directly on pixels of input image work directly in ____________
a) Transform domain
b) Spatial domain
c) Inverse transformation
d) None of the Mentioned
Answer: b

5. Which expression is obtained by performing the negative transformation on the negative of an image with gray

levels in the range[0,L-1] ?
a) s=L+1-r
b) s=L+1+r
c) s=L-1-r
d) s=L-1+r
Answer: c

6. In contrast stretching, if r1=s1 and r2=s2 then which of the following is true?
a) The transformation is not a linear function that produces no changes in gray levels
b) The transformation is a linear function that produces no changes in gray levels
c) The transformation is a linear function that produces changes in gray levels
d) The transformation is not a linear function that produces changes in gray levels
Answer: b



7. In which type of slicing, highlighting a specific range of gray levels in an image often is desired?
a) Gray-level slicing
b) Bit-plane slicing
c) Contrast stretching
d) Byte-level slicing
Answer: a

8. The principal factor to determine the spatial resolution of an image is _______
a) Quantization
b) Sampling
c) Contrast
d) Dynamic range
Answer: b

9. What is the name of the effect caused by the use of an insufficient number of gray levels in smooth areas of a

digital image?
a) Dynamic range
b) Ridging
c) Graininess
d) False contouring
Answer: d

10. What does a shift up and right in the curves of isopreference curve simply means? Verify in terms of N

(number of pixels) and k (L=2k, L is the gray level) values.
a) Smaller values for N and k, implies a better picture quality
b) Larger values for N and k, implies low picture quality
c) Larger values for N and k, implies better picture quality
d) Smaller values for N and k, implies low picture quality
Answer: c

Quiz 3

1. Color model is also named as (another name):
a) Color space
b) Color gap
c) Color space & color system
d) Color system

Answer: c

2. 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 space

Answer: a

3. 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

4. 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)].

Answer: d

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)

Answer: b 

6. 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)

Answer: d

7. Which of the following color models are used for color printing?
a) RGB
b) CMY
c) CMYK
d) CMY and CMYK

Answer: d

8. What does the total number of pixels in the region defines?

a) Perimeter
b) Area
c) Intensity
d) Brightness

Answer: b

9. What is the unit of compactness of a region?

a) Meter
b) Meter2
c) No units
d) Meter-1

Answer: c

10.  Which of the following measures are not used to describe a region?

a) Mean and median of grey values
b) Minimum and maximum of grey values
c) Number of pixels alone
d) Number of pixels above and below mean

Answer: c