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. If window width increases - image contrast will ____.






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






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






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






5. What are devices that process information?






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






7. 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?






8. Computers operate from ____ ____ language.






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






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






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






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






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






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






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






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






17. What changes the pixel value by addition or subtraction and controls image density?






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






19. Increased noise = _____ image contrast.






20. 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.






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






22. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?






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






24. Which type of information consists of operating instructions?






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






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






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






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






29. What changes the pixel value by addition or subtraction and controls image density?






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






31. A larger matrix provides ____ pixels.






32. A high contrast image has a ___ frequency.






33. 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?






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






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






36. What determines resolution?






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






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






39. 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.






40. A high S/N indicates ___ noise in the image.






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






42. What is an image that has been converted into numerical values for transmission or processing?






43. What was the earliest computer device called?






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






45. A high S/N indicates ___ noise in the image.






46. Computers operate from ____ ____ language.






47. 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.






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






49. Noise is ____ related to contrast.






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







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