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. 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.






2. Modalities differ in bit depth that is available depending on the capabilities of what?






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






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






5. What is required for collection of input information?






6. A __ _____ disk will store over 10000000 bytes of information.






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






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






9. What is high-pass filtering also called?






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






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






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






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






14. Noise is measured as what?






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






16. 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?






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






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






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






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






21. 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?






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






23. What are the two ways detectors acquire information?






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






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






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






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






28. 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.






29. What is the information stored as magnetic variations referred to as?






30. What does a 0 in binary code stand for?






31. 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?






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






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






34. What is the name for a binary digit?






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






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






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






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






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






40. Digitalization of analog information (increases / reduces) the quality and quantity of information?






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






42. 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.






43. What are the two ways detectors acquire information?






44. When was ENIAC invented?






45. Computer equipment is called what?






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






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






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






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






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