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






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






3. Changes in window width are sometimes called gray scale ____ or ____.






4. 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?






5. 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.






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






7. Which type of information consists of collected facts?






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






9. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?






10. What determines resolution?






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






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






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






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






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






16. Changes in window width are sometimes called gray scale ____ or ____.






17. What are the two most common output devices?






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






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






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






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






22. Increased noise = _____ image contrast.






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






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






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






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






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






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






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






30. What are devices that process information?






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






32. What was the earliest computer device called?






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






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






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






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






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






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






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






40. 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?






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






42. What modalities are array processors useful for?






43. What is the name of the 'modern electronic computer'?






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






45. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?






46. A larger matrix provides ____ pixels.






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






48. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?






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






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