Digital Image Processing MCQs

A) The process of converting analog images to digital images
B) The process of analyzing and manipulating images through digital methods
C) The study of images in a digital format
D) All of the above

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2. Which of the following is a common image file format?

A) JPEG
B) DOC
C) MP3
D) TXT

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3. What does the term “pixel” refer to in digital images?

A) A type of image filter
B) The smallest unit of a digital image
C) A software tool for image editing
D) A color model

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4. What is the primary purpose of image filtering?

A) To reduce image size
B) To enhance certain features or remove noise
C) To change the file format
D) To compress image data

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5. Which of the following is an application of Digital Image Processing?

A) Medical imaging
B) Image recognition
C) Remote sensing
D) All of the above

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6. What is histogram equalization used for?

A) To improve image contrast
B) To compress images
C) To reduce noise
D) To convert colors

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7. What does the term “resolution” refer to in the context of digital images?

A) The size of the image in bytes
B) The number of pixels in an image
C) The quality of an image based on color depth
D) The speed of image processing

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8. Which color model uses red, green, and blue as primary colors?

A) CMYK
B) HSL
C) RGB
D) HSV

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9. What is a convolution operation in image processing?

A) A method for resizing images
B) A mathematical operation to filter images
C) A technique to convert images to black and white
D) A way to enhance image colors

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10. Which of the following techniques is used for edge detection?

A) Gaussian filter
B) Sobel operator
C) Median filter
D) Bilateral filter

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11. What is the purpose of image segmentation?

A) To convert images from one format to another
B) To divide an image into meaningful parts
C) To enhance image colors
D) To reduce image size

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12. Which type of noise is often removed using median filtering?

A) Gaussian noise
B) Salt-and-pepper noise
C) Poisson noise
D) Uniform noise

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13. What is the main function of the Fourier Transform in image processing?

A) To enhance image quality
B) To analyze the frequency components of an image
C) To segment images
D) To compress image data

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14. Which of the following is a common method for image compression?

A) Lossy compression
B) Lossless compression
C) Both A and B
D) None of the above

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15. In which application is Digital Image Processing NOT typically used?

A) Video games
B) Weather forecasting
C) Text processing
D) Satellite imagery

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16. What does the term “color depth” refer to?

A) The number of colors in an image
B) The quality of colors in an image
C) The brightness of an image
D) The contrast ratio of an image

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17. Which technique is used to resize images?

A) Filtering
B) Interpolation
C) Segmentation
D) Compression

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18. What is a Gaussian blur?

A) A method to enhance edges
B) A technique to smooth an image
C) A way to sharpen an image
D) A process to detect colors

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19. What is the primary purpose of image restoration?

A) To improve image quality by reducing noise and blurriness
B) To change the color of an image
C) To segment images into parts
D) To compress images for storage

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20. Which of the following is a popular software for Digital Image Processing?

A) Adobe Photoshop
B) Microsoft Word
C) Excel
D) Notepad

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21. What is the main function of a digital camera’s sensor?

A) To store images
B) To convert light into electrical signals
C) To process images
D) To compress images

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22. Which of the following operations is NOT typically performed in Digital Image Processing?

A) Data analysis
B) Image filtering
C) Image enhancement
D) Image storage

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23. What is the significance of the aspect ratio in images?

A) It affects image quality
B) It determines the shape of the image
C) It influences color depth
D) It defines the file size

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24. Which file format supports lossless compression?

A) JPEG
B) PNG
C) GIF
D) Both B and C

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25. What is the purpose of a color space?

A) To define how colors are represented in images
B) To compress image data
C) To resize images
D) To filter images

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26. What does the term “aliasing” refer to in image processing?

A) A method of compressing images
B) Distortion that occurs when representing high-frequency detail
C) A color representation method
D) A filtering technique

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27. Which of the following filters is used for sharpening images?

A) Low-pass filter
B) High-pass filter
C) Median filter
D) Gaussian filter

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28. What is a binary image?

A) An image that contains multiple colors
B) An image that consists of only two colors: black and white
C) An image with grayscale tones
D) An image with multiple shades of a single color

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29. What does “DPI” stand for in image printing?

A) Data Per Inch
B) Dots Per Inch
C) Density Per Inch
D) Dimensions Per Inch

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30. Which algorithm is commonly used for image segmentation?

A) K-means clustering
B) Fourier Transform
C) Principal Component Analysis
D) Singular Value Decomposition

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31. What is the role of the luminance component in an image?

A) To define color saturation
B) To represent brightness levels
C) To adjust contrast
D) To compress data

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32. What is the purpose of a watermark in images?

A) To improve image resolution
B) To protect copyright and ownership
C) To enhance image quality
D) To reduce file size

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33. Which technique is often used to detect corners in an image?

A) Sobel operator
B) Harris corner detector
C) Canny edge detector
D) Gaussian blur

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34. What is the purpose of a look-up table (LUT) in image processing?

A) To store image metadata
B) To enhance colors and contrast
C) To convert images to grayscale
D) To compress images

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35. What does the term “gamma correction” refer to?

A) Adjusting the brightness of an image
B) A method of color adjustment
C) The process of compressing images
D) A technique to improve image resolution

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36. What is the primary advantage of using vector graphics?

A) They are resolution dependent
B) They can be scaled without loss of quality
C) They require more storage
D) They are easier to edit

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37. What is “noise reduction” in image processing?

A) The process of eliminating unwanted artifacts from an image
B) The enhancement of image features
C) The compression of image data
D) The adjustment of image colors

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38. What does the acronym “MSE” stand for in image quality assessment?

A) Mean Square Error
B) Median Square Error
C) Maximum Square Error
D) Minimum Square Error

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39. Which technique can be used to convert a color image to grayscale?

A) Histogram equalization
B) Color averaging
C) Image segmentation
D) Color inversion

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40. What is the main purpose of image morphology?

A) To compress images
B) To analyze geometric structures in images
C) To enhance color
D) To change file formats

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41. Which of the following is a characteristic of a grayscale image?

A) It contains multiple colors
B) It represents color depth
C) It consists of varying shades of gray
D) It is always a binary image

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42. What is the purpose of using a mask in image processing?

A) To enhance image brightness
B) To apply effects to specific parts of an image
C) To compress images
D) To change file formats

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43. Which of the following is NOT a common image enhancement technique?

A) Contrast stretching
B) Histogram equalization
C) Median filtering
D) Image resizing

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44. What is the significance of the Canny edge detector?

A) It is a simple edge detection method
B) It provides multi-stage edge detection
C) It works only on grayscale images
D) It does not provide good results

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45. Which technique is commonly used for image feature extraction?

A) K-means clustering
B) Hough transform
C) Histogram equalization
D) Gaussian filtering

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46. What is the primary goal of image registration?

A) To align different images of the same scene
B) To compress images for storage
C) To enhance image colors
D) To resize images

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47. Which of the following color models is often used in printing?

A) RGB
B) CMYK
C) HSL
D) HSV

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48. What does the term “spatial resolution” refer to?

A) The amount of detail an image holds
B) The number of colors in an image
C) The compression level of an image
D) The brightness of an image

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49. What is the result of applying a low-pass filter to an image?

A) Enhanced edges
B) Smoother image with reduced noise
C) Increased brightness
D) Increased color saturation

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50. Which of the following describes a “feature” in an image?

A) The size of the image
B) A distinctive pattern or detail in the image
C) The color of the image
D) The resolution of the image

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51. What is the role of the brightness adjustment in image processing?

A) To enhance colors
B) To change the contrast
C) To make an image lighter or darker
D) To sharpen edges

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52. Which file format supports both vector and raster graphics?

A) JPEG
B) SVG
C) PNG
D) GIF

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53. What does the acronym “ROI” stand for in image processing?

A) Region of Interest
B) Region of Information
C) Return of Investment
D) Region of Input

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54. What type of transformation is performed during image rotation?

A) Linear transformation
B) Non-linear transformation
C) Affine transformation
D) Geometric transformation

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55. Which technique is used to enhance image contrast?

A) Histogram stretching
B) Image smoothing
C) Gaussian filtering
D) Edge detection

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56. What does the term “interpolation” refer to in image processing?

A) The process of enlarging an image
B) The estimation of pixel values in an image
C) The reduction of image quality
D) The conversion of color spaces

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57. What is the purpose of a color histogram?

A) To represent the brightness levels in an image
B) To visualize the distribution of colors in an image
C) To determine the resolution of an image
D) To compress image data

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58. Which filter is used to remove Gaussian noise from an image?

A) Median filter
B) Gaussian filter
C) High-pass filter
D) Low-pass filter

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59. What is the main goal of edge detection in image processing?

A) To reduce image size
B) To find boundaries within an image
C) To enhance color depth
D) To compress images

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60. Which technique is commonly used for image classification?

A) Neural networks
B) Fourier Transform
C) Morphological operations
D) Histogram equalization

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61. What does the acronym “SNR” stand for in image processing?

A) Signal-to-Noise Ratio
B) Source-to-Noise Ratio
C) Signal-to-Noise Rendering
D) Signal-to-Negative Ratio

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62. Which of the following is NOT a color space?

A) RGB
B) CMYK
C) YUV
D) XYZ-Alpha

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63. What is the effect of using a high-pass filter on an image?

A) It blurs the image
B) It enhances edges and fine details
C) It reduces noise
D) It decreases brightness

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64. What does “quantization” refer to in digital images?

A) The process of measuring pixel values
B) The reduction of color levels in an image
C) The increase of image size
D) The conversion of images to grayscale

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65. Which of the following is a method of image compression?

A) Huffman coding
B) Color mapping
C) Pixel filtering
D) Histogram manipulation

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66. What is the role of a “template” in image matching?

A) To compress images
B) To analyze and compare image features
C) To enhance colors
D) To convert file formats

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67. Which of the following tools is used for image manipulation?

A) MATLAB
B) Excel
C) Notepad
D) PowerPoint

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68. What is the primary goal of image deblurring?

A) To compress image size
B) To enhance image colors
C) To restore sharpness in blurred images
D) To convert images to grayscale

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69. What does the acronym “CAD” stand for in the context of images?

A) Computer-Aided Design
B) Computer Application Development
C) Color Adjustment Display
D) Composite Array Design

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70. Which of the following describes a “filter” in image processing?

A) A tool to remove color
B) A technique to modify pixel values
C) A software application for editing images
D) A process of converting images

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71. What is the effect of applying a median filter?

A) It sharpens the image
B) It removes noise while preserving edges
C) It enhances colors
D) It reduces image size

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72. What does the term “contrast stretching” refer to?

A) A method to enhance brightness
B) A technique to improve image contrast
C) A process of resizing images
D) A way to reduce noise

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73. Which of the following is a characteristic of lossy compression?

A) No data is lost during compression
B) It reduces image quality
C) It is always reversible
D) It uses fewer resources

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74. What does the acronym “JPEG” stand for?

A) Joint Photographic Experts Group
B) Joint Picture Encoding Group
C) Joint Photo Editing Group
D) Joint Print Engineering Group

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75. Which of the following operations can be used to blend two images?

A) Image masking
B) Image inversion
C) Image filtering
D) Image segmentation

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76. What is the purpose of “feature matching” in image processing?

A) To reduce image size
B) To compare features from different images
C) To enhance colors
D) To convert images to grayscale

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77. What is the effect of using a low-pass filter?

A) Enhanced edges
B) Smoother image with reduced detail
C) Increased brightness
D) Color inversion

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78. Which of the following describes a “raster” image?

A) It is made up of lines and curves
B) It consists of pixels arranged in a grid
C) It can be scaled without loss of quality
D) It is a mathematical representation of images

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79. What is the primary function of a “pixel” in an image?

A) To store image metadata
B) To represent color and brightness
C) To define image format
D) To compress data

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80. Which color model is commonly used in video displays?

A) RGB
B) CMYK
C) HSL
D) YCbCr

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81. What is the purpose of “image alignment”?

A) To compress images
B) To match different images for comparison
C) To enhance image quality
D) To convert images to black and white

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82. What does the acronym “API” stand for in the context of image processing software?

A) Application Programming Interface
B) Applied Processing Integration
C) Advanced Picture Imaging
D) Application Picture Interface

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83. What is the main purpose of “color grading” in image editing?

A) To adjust image brightness
B) To enhance the aesthetic quality of colors
C) To compress image files
D) To resize images

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84. Which of the following tools is NOT commonly used for image processing?

A) GIMP
B) Photoshop
C) Blender
D) Microsoft Word

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85. What is “dynamic range” in image processing?

A) The difference between the darkest and brightest parts of an image
B) The size of an image
C) The number of colors in an image
D) The amount of data in an image

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86. What does the term “object recognition” refer to in image processing?

A) The process of identifying objects within an image
B) The method of resizing images
C) The technique of filtering images
D) The enhancement of colors

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87. What is the purpose of “color correction” in image editing?

A) To reduce noise
B) To adjust colors to be more accurate
C) To enhance brightness
D) To compress image data

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88. Which of the following is a technique used for facial recognition?

A) Edge detection
B) Neural networks
C) Fourier Transform
D) Morphological operations

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89. What does “image inversion” do to an image?

A) It enhances edges
B) It changes colors to their opposites
C) It converts the image to grayscale
D) It reduces image size

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90. Which of the following is a characteristic of a vector graphic?

A) It is made of pixels
B) It can be scaled without losing quality
C) It has a fixed resolution
D) It is always black and white

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91. What is the main purpose of a “frame buffer” in image processing?

A) To store and manage image data
B) To compress images
C) To enhance image quality
D) To convert formats

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92. Which of the following techniques is used to track objects in video?

A) Histogram equalization
B) Optical flow
C) Edge detection
D) Image segmentation

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93. What is a “3D rendering” in image processing?

A) Creating a 3D model from 2D images
B) The process of generating a 2D image from a 3D model
C) The method of compressing 3D images
D) Converting images to grayscale

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94. What does the acronym “NLP” stand for in the context of image processing?

A) Neural Linear Processing
B) Natural Language Processing
C) Non-linear Pixel
D) Normalized Light Processing

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95. What is the primary purpose of “image synthesis”?

A) To create new images from existing ones
B) To reduce image size
C) To enhance image colors
D) To analyze image features

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96. Which of the following is NOT a method for image filtering?

A) Low-pass filtering
B) High-pass filtering
C) Morphological filtering
D) Content-aware filtering

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97. What is the significance of “metadata” in images?

A) It provides additional information about the image
B) It affects the image quality
C) It represents the colors in an image
D) It defines the resolution

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98. Which of the following describes a “visualization” technique in image processing?

A) It enhances image contrast
B) It helps interpret complex data through images
C) It compresses image data
D) It changes file formats

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99. What does “template matching” do in image processing?

A) It filters images
B) It compares an image to a template for recognition
C) It enhances image colors
D) It resizes images

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100. What is the effect of applying a “color filter” in image processing?

A) It changes the brightness of an image
B) It alters the color balance of an image
C) It compresses image data
D) It enhances edges

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