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 accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?






2. 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?






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






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






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






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






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






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






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






10. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.






11. Noise is measured as what?






12. What does DICOM stand for?






13. Fluoroscopic noise mostly comes from what?






14. What was the earliest computer device called?






15. Resolution is controlled by what?






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






17. There is a ___ relationship between subject contrast and acquired data contrast.






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






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






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






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






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






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






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






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






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






27. What does DICOM stand for?






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






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






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






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






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






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






34. A high contrast image has a ___ frequency.






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






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






37. Increased noise = _____ image contrast.






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






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






40. 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?






41. A larger matrix provides ____ pixels.






42. In what time period did microchip technology come out?






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






44. Computer equipment is called what?






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






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






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






48. Noise is measured as what?






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






50. What was the earliest computer device called?