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. A larger matrix provides ____ pixels.






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






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






4. Resolution is controlled by what?






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






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






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






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






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






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






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






12. A high S/N indicates ___ noise in the image.






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






14. What determines resolution?






15. What is required for collection of input information?






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






17. Computers operate from ____ ____ language.






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






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






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






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






22. 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.






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






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






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






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






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






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






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






30. When was ENIAC invented?






31. What was the earliest computer device called?






32. Which type of information consists of collected facts?






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






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






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






36. What are the two ways detectors acquire information?






37. Computer programs are called what?






38. Window width and contrast have an ____ relationship.






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






40. What are devices that process information?






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






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






43. Noise is ____ related to contrast.






44. Noise is measured as what?






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






46. A high contrast image has a ___ frequency.






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






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






49. Increased noise = _____ image contrast.






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