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 are the 3 classifications of digitized image filters?






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






3. Window width and contrast have an ____ relationship.






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






5. Computerized digital images are described in terms of what






6. 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?






7. The number of shades of gray is determined by what?






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






9. Window width and contrast have an ____ relationship.






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






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






12. Noise is measured as what?






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






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






15. What was the earliest computer device called?






16. 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?






17. What does DICOM stand for?






18. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.






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






20. What can memory be transferred as?






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






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






23. What are the two most common output devices?






24. Modalities differ in bit depth that is available depending on the capabilities of what?






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






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






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






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






29. What directs information to and from various parts of the computer?






30. Computer programs are called what?






31. What determines resolution?






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






33. 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.






34. When was ENIAC invented?






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






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






37. A high contrast image has a ___ frequency.






38. What is the information stored as magnetic variations referred to as?






39. What is the equation for determining gray scale bit depth?






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






41. Noise is ____ related to contrast.






42. What is the name for a binary digit?






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






44. 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.






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






46. What was the earliest computer device called?






47. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.






48. 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?






49. What are devices that process information?






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