Test your basic knowledge |

Digital Image Processing

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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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. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained






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






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






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






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






7. Computers operate from ____ ____ language.






8. Which type of information consists of operating instructions?






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






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






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






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






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






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






15. What are devices that process information?






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






17. All medical imaging is achieved with which type of computers?






18. What modalities are array processors useful for?






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






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






21. Which type of information consists of operating instructions?






22. Computerized digital images are described in terms of what






23. What is required for collection of input information?






24. All medical imaging is achieved with which type of computers?






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






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






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






28. 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.






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






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






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






32. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?






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






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






35. A larger matrix provides ____ pixels.






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






37. Computers operate from ____ ____ language.






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






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






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






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






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






43. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.






44. Computer programs are called what?






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






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






47. What is high-pass filtering also called?






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






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






50. 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.







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