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 two most common output devices?






2. In what time period did mathematical theory and solid-state electronics come out?






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






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






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






6. Computers operate from ____ ____ language.






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






8. Computer programs are called what?






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






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






11. Window width and contrast have an ____ relationship.






12. 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.






13. Resolution is controlled by what?






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






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






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






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






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






20. A larger matrix provides ____ pixels.






21. A low contrast image has a ___ frequency.






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






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






24. What are the two types of information computers use?






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






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






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






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






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






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






31. Which type of information consists of collected facts?






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






33. Which computers handle data composed of definite quantities of current?






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






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






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






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






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






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






40. What modalities are array processors useful for?






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






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






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






44. If window width increases - image contrast will ____.






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






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






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






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






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