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 information stored as magnetic variations referred to as?






2. What is an individual matrix box or picture element?






3. Which computers handle data composed of continuously varying electrical currents?






4. What modalities are array processors useful for?






5. What modalities are array processors useful for?






6. What permit input/output of information to or from the CPU?






7. A high contrast image has a ___ frequency.






8. What is the random background information that does not contribute to the image quality?






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






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






11. Which type of information consists of collected facts?






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






13. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?






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






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






16. In what time period did microchip technology come out?






17. What determines resolution?






18. Resolution is controlled by what?






19. What is high-pass filtering also called?






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






21. DICOM imaging now includes compatibility via a database system that includes linage of the patient images with the patient's EMR. This database system is called what?






22. Changes in window width are sometimes called gray scale ____ or ____.






23. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.






24. The computer either ____ or ____ selected frequencies during the filtering process.






25. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?






26. 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?






27. What is the digital standard for imaging that is designed to ensure that all equipment fro all manufacturers who choose to adhere to the standard are speaking the same computer language?






28. Because electrical currents are understood as being either on or off - the binary system consists of information recorded as either a _ for off or a _ for on.






29. A high contrast image has a ___ frequency.






30. What permit input/output of information to or from the CPU?






31. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.






32. Computer equipment is called what?






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






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






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






36. What are devices that process information?






37. What can memory be transferred as?






38. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.






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






40. What is the frequency response of the incoming signal called?






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






42. Binary systems operate with a ___-symbol language.






43. What 3 things were required prior to digital computer applications in medical imaging?






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






45. Each pixel is capable of representing a wide range of what?






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






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






48. Noise is ____ related to contrast.






49. 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.






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