Test your basic knowledge |

Digital Image Processing

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?






2. When detectors acquire their information through ____ they are receiving all the info at once.






3. What does a 1 in binary code stand for?






4. What type of scanning increases resolution but can't be used in real-time dynamic studies?






5. Which type of filter amplifies or deletes all but a selected range or band of frequencies and is useful in the elimination of characteristic emission peaks?






6. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.






7. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.






8. A __ _____ disk will store over 10000000 bytes of information.






9. What is the 'noisiest' component of a digital system?






10. Which memory replaces new information with the old; can change?






11. What is the 'heart' of every computer?






12. There is a ___ relationship between subject contrast and acquired data contrast.






13. What type of scanning increases resolution slightly by scanning all 525 lines in order?






14. Which type of information consists of operating instructions?






15. What provides specific instructions for calculations and sequential steps to be followed?






16. What is critical to how fast the computer system can function?






17. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.






18. Digitalization of analog information (increases / reduces) the quality and quantity of information?






19. The quality of the data acquired from the IR is measured by what three data characteristics?






20. Noise is measured as what?






21. Digital detectors are capable of producing ______ shades of gray.






22. What are the two most common output devices?






23. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained






24. What is high-pass filtering also called?






25. What type of scanning increases resolution slightly by scanning all 525 lines in order?






26. What type of memory storage devices are required for large amounts of data?






27. Because the range of stored densities is so much wider than the visual range - any digital image is only a small part of the total data obtained - each image is a _____ on the total range of data.






28. Which type of information consists of operating instructions?






29. When subject contrast is high - the acquired data contrast will be ____.






30. What is critical to how fast the computer system can function?






31. What is the raw data to which a Fourier Transformation is applied to create the digital image?






32. What is the system of conductors that connects the various components of a computer system and permits the CPU to accept inputs from any point along the conductor?






33. There is a ___ relationship between subject contrast and acquired data contrast.






34. What does a 0 in binary code stand for?






35. The _____ the matrix size - the better the resolution.






36. Computer programs are called what?






37. What does a 0 in binary code stand for?






38. What is the primary limitation with the resolution on digital images?






39. Noise is ____ related to contrast.






40. Computer memory is often rated in terms of total ____ memory.






41. What is required for collection of input information?






42. All medical imaging is achieved with which type of computers?






43. Digitalization of analog information (increases / reduces) the quality and quantity of information?






44. What is the measure of the differences between the data values referred to as?






45. The human visual range is ___ or fewer shades of gray.






46. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained






47. What changes the pixel value by multiplication or division and controls image contrast?






48. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?






49. A high contrast image has a ___ frequency.






50. If the window level increases - density will _____.