Image Compression (RLE, Huffman, LZW, JPEG, JPEG2000) — MCQs | Digital Image Processing

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1. What is the main purpose of image compression in digital image processing?



2. Which of the following is a lossless image compression technique?



3. Which algorithm replaces frequently occurring patterns with shorter codes?



4. In Huffman coding, which type of symbol is assigned the shortest code?



5. Which compression method uses run lengths to encode sequences of data?



6. LZW compression was originally used in which of the following formats?



7. Which of the following is a lossy image compression standard?



8. What transform is used in the standard JPEG compression method?



9. Which compression method is considered more advanced than JPEG and uses wavelets?



10. Which of the following is not a feature of JPEG2000?



11. What is the main disadvantage of lossy compression?



12. Which of the following compression techniques is dictionary-based?



13. What does LZW stand for?



14. What is the output of Huffman coding?



15. What is the first step in JPEG compression?



16. Why is DCT preferred in JPEG over other transforms?



17. Which step in JPEG compression introduces most data loss?



18. Which component is compressed more aggressively in JPEG compression?



19. What is the purpose of zigzag scanning in JPEG?



20. What kind of data does RLE handle efficiently?



21. Which of the following is not a lossless compression technique?



22. In LZW compression, what is stored in the dictionary?



23. What kind of compression is used in JPEG for entropy coding?



24. Which of the following is typically smaller after compression with JPEG?



25. What is the typical block size used in JPEG DCT?



26. What is the purpose of quantization in image compression?



27. Which transform is used in JPEG2000?



28. Which property of wavelet transform makes it useful for compression?



29. Which of the following supports both lossy and lossless modes?



30. What technique is used to reorder DCT coefficients in JPEG?



31. Which algorithm builds a binary tree based on symbol frequency?



32. Which image compression format is commonly used for medical and satellite images?



33. What does entropy coding in compression exploit?



34. What type of redundancy does RLE remove?



35. Which component in JPEG handles color conversion?



36. Which is the most dominant frequency component in images?



37. Why is chroma subsampling used in JPEG?



38. Which compression method is most suitable for text images?



39. Which term describes the amount of compression achieved?



40. Which file format commonly uses LZW compression?



41. Which of the following does not affect JPEG compression ratio?



42. How does JPEG2000 achieve scalability?



43. Which is a disadvantage of JPEG compression?



44. Which of the following is most robust for image quality?



45. Which compression format offers better performance at lower bit rates?



46. Which JPEG step reduces perceptual redundancy?



47. In image compression, what is ‘lossy’ mainly defined by?



48. Which compression algorithm uses string matching and table indexing?



49. Which of the following formats is not typically compressed?



50. Which type of compression technique results in a smaller file size but cannot reconstruct the original image exactly?



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