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 frequency response of the incoming signal called?






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






3. Noise is ____ related to contrast.






4. 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?






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






6. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?






7. Around what time did digital computerization come out for CT and US?






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






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






10. What is a square series of boxes that gives form to the image?






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






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






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






14. Which type of information consists of operating instructions?






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






16. What are the two ways detectors acquire information?






17. What is the name for a binary digit?






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






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






20. Resolution is controlled by what?






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






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






23. Noise is measured as what?






24. Which type of information consists of collected facts?






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






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






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






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






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






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






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






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






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






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






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






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






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






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






39. What is a square series of boxes that gives form to the image?






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






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






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






43. What can memory be transferred as?






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






45. Fluoroscopic noise mostly comes from what?






46. What are the two ways detectors acquire information?






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






48. When was ENIAC invented?






49. 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.






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