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. Fluoroscopic noise mostly comes from what?






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






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






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






5. Noise is measured as what?






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






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






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






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






10. Resolution is controlled by what?






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






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






13. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?






14. Computers operate from ____ ____ language.






15. When was ENIAC invented?






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






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






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






19. 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.






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






21. Computerized digital images are described in terms of what






22. What are devices that process information?






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






24. 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?






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






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






27. What modalities are array processors useful for?






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






29. 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.






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






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






32. 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?






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






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






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






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






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






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






39. The ____ is the heart of the computer while the ___ is the vessels.






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






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






42. Which type of information consists of operating instructions?






43. What can memory be transferred as?






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






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






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






47. A larger matrix provides ____ pixels.






48. What was the earliest computer device called?






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






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







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