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 does a 0 in binary code stand for?






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






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






4. 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?






5. Who or What is responsible for density changes on a digital image? On a manual image






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






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






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






9. Resolution is controlled by what?






10. A larger matrix provides ____ pixels.






11. What is required for collection of input information?






12. Which memory can only be extracted without alteration; cannot change?






13. Computer programs are called what?






14. Medical imaging is often achieved from information that has been processed by what?






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






16. What is required for collection of input information?






17. Who or What is responsible for density changes on a digital image? On a manual image






18. Which type of filter amplifies or deletes all but the high frequencies - appears to increase contrast - and is useful in vascular imaging or digital mammo.






19. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?






20. The ____ is the heart of the computer while the ___ is the vessels.






21. Increased noise = _____ image contrast.






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






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






24. What are devices that process information?






25. Computer equipment is called what?






26. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?






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






28. What is the mathematical algorithm used to create all medical images?






29. Window width and contrast have an ____ relationship.






30. When detectors acquire their information by ____ they are receiving info from a specific area.






31. What are the 3 classifications of digitized image filters?






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






33. Window width and contrast have an ____ relationship.






34. When detectors acquire their information by ____ they are receiving info from a specific area.






35. What is the name for a binary digit?






36. 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?






37. What are the two most common output devices?






38. What input device do radiographers use on a normal basis?






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






40. It is important that the radiographer understand anatomy from different perspectives due to the methods of digital processing and image information? What are the 3 perspectives?






41. What is the name for an 8-bit word?






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






43. What can memory be transferred as?






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






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






46. What can memory be transferred as?






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






48. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?






49. What input device do radiographers use on a normal basis?






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