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. What was the earliest computer device called?






2. What was the earliest computer device called?






3. What is the name for a binary digit?






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






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






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






7. 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.






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






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






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






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






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






13. Noise is ____ related to contrast.






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






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






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






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






18. Computer programs are called what?






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






20. What is required for collection of input information?






21. What is the name for a binary digit?






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






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






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






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






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






27. Window width and contrast have an ____ relationship.






28. Computer equipment is called what?






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






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






31. 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.






32. A low contrast image has a ___ frequency.






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






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






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






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






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






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






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






40. A low contrast image has a ___ frequency.






41. 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?






42. What is the raw data to which a Fourier Transformation is applied to create the digital image?






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






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






45. When was ENIAC invented?






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






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






48. What are the two ways detectors acquire information?






49. Window width and contrast have an ____ relationship.






50. Fluoroscopic noise mostly comes from what?