1. Q1: What is the basic unit of a digital image?
(A) Dot
(B) Pixel
(C) Voxel
(D) Bit
2. Q2: Digital Image Processing primarily deals with ___.
(A) Analog signals
(B) Discrete signals
(C) Continuous signals
(D) Mixed signals
3. Q3: The process of converting an analog image into digital form is called ___.
(A) Scanning
(B) Quantization
(C) Sampling
(D) Digitization
4. Q4: The number of bits used to represent each pixel is known as ___.
(A) Bit Plane
(B) Bit Depth
(C) Resolution
(D) Byte Level
5. Q5: The device used to acquire digital images is known as ___.
(A) Scanner
(B) Sensor
(C) Camera
(D) All of the above
6. Q6: Which of the following defines image resolution?
(A) File size
(B) Bit depth
(C) Number of pixels
(D) Image color
7. Q7: Which image transformation is used to enhance contrast?
(A) Image subtraction
(B) Log transformation
(C) Histogram equalization
(D) Bit-plane slicing
8. Q8: Image noise is generally caused by ___.
(A) Sensor temperature
(B) Transmission errors
(C) Illumination conditions
(D) All of the above
9. Q9: What does HVS stand for in image processing?
(A) Human View System
(B) Human Vision System
(C) High Visual Sensitivity
(D) Horizontal View Segment
10. Q10: The process of adjusting the image to enhance its quality is called ___.
(A) Image enhancement
(B) Image segmentation
(C) Image recognition
(D) Image conversion
11. Q11: Which function is used to reduce image size without losing details?
(A) Enlargement
(B) Decimation
(C) Smoothing
(D) Cropping
12. Q12: A grayscale image typically has how many intensity levels?
(A) 16
(B) 64
(C) 128
(D) 256
13. Q13: Which color model is commonly used in digital image processing?
(A) RGB
(B) CMYK
(C) HSV
(D) YCbCr
14. Q14: The operation that combines two images by adding their pixel values is called ___.
(A) Image blending
(B) Image addition
(C) Image filtering
(D) Image fusion
15. Q15: What is the purpose of image quantization?
(A) To resize image
(B) To reduce noise
(C) To assign gray levels
(D) To increase resolution
16. Q16: Power-law transformation is also called ___.
(A) Contrast stretching
(B) Log transformation
(C) Gamma correction
(D) Smoothing
17. Q17: Which technique is used to remove high-frequency noise?
(A) High-pass filter
(B) Edge detection
(C) Low-pass filter
(D) Histogram equalization
18. Q18: Bit-plane slicing is used to ___.
(A) Compress images
(B) Isolate significant bit information
(C) Improve contrast
(D) Add filters
19. Q19: Which method enhances an image by spreading out its intensity values?
(A) Image subtraction
(B) Histogram specification
(C) Histogram equalization
(D) Image sharpening
20. Q20: What is the main disadvantage of increasing bit depth?
(A) Lower resolution
(B) Lower contrast
(C) Higher memory usage
(D) Blurred image
21. Q21: An image with more pixels per inch is said to have higher ___.
(A) Bit depth
(B) Resolution
(C) Color depth
(D) Compression
22. Q22: Which of the following is not an image enhancement technique?
(A) Log transformation
(B) Contrast stretching
(C) Histogram equalization
(D) Compression
23. Q23: Which transform is used in frequency domain processing?
(A) Histogram
(B) Fourier Transform
(C) Bit slicing
(D) Color inversion
24. Q24: What does DCT stand for in DIP?
(A) Digital Code Transformation
(B) Discrete Cosine Transform
(C) Digital Channel Testing
(D) Discrete Channel Transfer
25. Q25: What is the main goal of image segmentation?
(A) Resize the image
(B) Divide image into regions
(C) Compress the image
(D) Increase brightness
26. Q26: Which is used to sharpen an image?
(A) Low-pass filter
(B) Smoothing filter
(C) High-pass filter
(D) Histogram equalization
27. Q27: The technique of averaging pixel values is used in ___.
(A) Edge detection
(B) Sharpening
(C) Smoothing
(D) Segmentation
28. Q28: A binary image has how many intensity levels?
(A) 1
(B) 2
(C) 8
(D) 256
29. Q29: Which of the following enhances the edges in an image?
(A) Smoothing
(B) Median filter
(C) Laplacian operator
(D) Contrast stretching
30. Q30: Which filter is most effective in removing salt-and-pepper noise?
(A) Gaussian filter
(B) Median filter
(C) Mean filter
(D) Butterworth filter
31. Q31: In digital image processing, the spatial domain refers to ___.
(A) Frequency values
(B) Pixel location
(C) Intensity distribution
(D) Color mapping
32. Q32: The smallest addressable element in an image is a ___.
(A) Pixel
(B) Node
(C) Dot
(D) Grid
33. Q33: Image restoration aims to ___.
(A) Enhance the image
(B) Blur the image
(C) Recover degraded images
(D) Convert color models
34. Q34: A 3×3 mask is commonly used in ___.
(A) Filtering
(B) Color conversion
(C) Coding
(D) Resizing
35. Q35: What is the purpose of zero-padding?
(A) Increase contrast
(B) Avoid aliasing
(C) Enhance resolution
(D) Adjust filter size
36. Q36: Which of the following is a non-linear filter?
(A) Gaussian filter
(B) Laplacian filter
(C) Median filter
(D) Mean filter
37. Q37: Which of the following is used for edge detection?
(A) Sobel operator
(B) Gaussian blur
(C) Low-pass filter
(D) Inverse filter
38. Q38: In histogram equalization, the histogram is made ___.
(A) Narrow
(B) Steep
(C) Uniform
(D) Flat
39. Q39: In a color image, each pixel typically contains ___.
(A) One color value
(B) Two color values
(C) Three color values
(D) Four color values
40. Q40: A 24-bit image supports how many colors?
(A) 256
(B) 512
(C) 16,777,216
(D) 65,536
41. Q41: Which process reduces the size of image data?
(A) Enhancement
(B) Segmentation
(C) Compression
(D) Filtering
42. Q42: Which of the following can perform spatial smoothing?
(A) Laplacian
(B) Sobel
(C) Averaging filter
(D) Roberts
43. Q43: In negative transformation, pixel value r is transformed to:
(A) r + L – 1
(B) L – 1 – r
(C) L – r
(D) r – L
44. Q44: Log transformation is useful for ___.
(A) Brightening dark regions
(B) Edge detection
(C) Noise removal
(D) High-contrast regions
45. Q45: Which image representation uses continuous values?
(A) Digital image
(B) Binary image
(C) Analog image
(D) Grayscale image
46. Q46: A high-pass filter emphasizes ___.
(A) Low-frequency components
(B) High-frequency components
(C) Both
(D) None
47. Q47: What does PSNR stand for?
(A) Power Signal Noise Ratio
(B) Pixel Sensitivity and Noise Ratio
(C) Peak Signal-to-Noise Ratio
(D) Picture Size Normal Ratio
48. Q48: Which is not a basic image enhancement technique?
(A) Log transformation
(B) Histogram equalization
(C) Fourier transform
(D) Contrast stretching
49. Q49: What is the full form of DIP?
(A) Digital Information Processing
(B) Digital Image Programming
(C) Digital Image Processing
(D) Digital Input Processing
50. Q50: Which software is commonly used for image processing tasks?
(A) Photoshop
(B) MATLAB
(C) OpenCV
(D) All of the above
