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 is the measure of the differences between the data values referred to as?






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






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






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






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






6. What directs information to and from various parts of the computer?






7. 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?






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






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






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






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






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






13. Noise is measured as what?






14. What modalities are array processors useful for?






15. 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?






16. Noise is measured as what?






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






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






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






20. When was ENIAC invented?






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






22. What are the two ways detectors acquire information?






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






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






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






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






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






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






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






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






31. Computer programs are called what?






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






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






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






35. A larger matrix provides ____ pixels.






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






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






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






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






40. Computer programs are called what?






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






42. What can memory be transferred as?






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






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






45. What is the name for a binary digit?






46. A low contrast image has a ___ frequency.






47. If window width increases - image contrast will ____.






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






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






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