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 mathematical algorithm used to create all medical images?






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






3. 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.






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






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






6. Window width and contrast have an ____ relationship.






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






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






9. What are the 3 classifications of digitized image filters?






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






11. 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.






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






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






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






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






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






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






18. What is the name for a binary digit?






19. A low contrast image has a ___ frequency.






20. What modalities are array processors useful for?






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






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






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






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






25. 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?






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






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






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






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






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






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






32. When was ENIAC invented?






33. Computers operate from ____ ____ language.






34. Window width and contrast have an ____ relationship.






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






36. What is the name for a binary digit?






37. What can memory be transferred as?






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






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






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






41. What are the two most common output devices?






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






43. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?






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






45. What input device do radiographers use on a normal basis?






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






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






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






49. A larger matrix provides ____ pixels.






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