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






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






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






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






5. What are the two most common output devices?






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






7. What is the primary limitation with the resolution on digital images?






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






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






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






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






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






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






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






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






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






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






18. Computer memory is often rated in terms of total ____ memory.






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






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






21. 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.






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






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






24. Fluoroscopic noise mostly comes from what?






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






26. When was ENIAC invented?






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






28. What is the system of conductors that connects the various components of a computer system and permits the CPU to accept inputs from any point along the conductor?






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






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






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






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






33. What determines resolution?






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






35. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.






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






37. A low contrast image has a ___ frequency.






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






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






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






41. Which type of information consists of operating instructions?






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






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






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






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






46. It is important that the radiographer understand anatomy from different perspectives due to the methods of digital processing and image information? What are the 3 perspectives?






47. What is the name for a binary digit?






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






49. Computer programs are called what?






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