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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 an individual matrix box or picture element?






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






3. A low contrast image has a ___ frequency.






4. A larger matrix provides ____ pixels.






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






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






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






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






9. What is high-pass filtering also called?






10. Window width and contrast have an ____ relationship.






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






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






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






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






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






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






17. What modalities are array processors useful for?






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






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






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






21. When was ENIAC invented?






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






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






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






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






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






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






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






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






30. What are devices that process information?






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






32. What was the earliest computer device called?






33. A low contrast image has a ___ frequency.






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






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






36. Fluoroscopic noise mostly comes from what?






37. What modalities are array processors useful for?






38. Which type of information consists of collected facts?






39. Noise is ____ related to contrast.






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






41. What is required for collection of input information?






42. What is an individual matrix box or picture element?






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






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






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






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






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






48. 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.






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






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






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