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






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






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






4. What does DICOM stand for?






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






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






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






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






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






10. Around what time did digital computerization come out for CT and US?






11. Computer equipment is called what?






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






13. Which computers handle data composed of continuously varying electrical currents?






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






15. Which type of information consists of collected facts?






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






17. What type of scanning increases resolution but can't be used in real-time dynamic studies?






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






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






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






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






22. 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.






23. Increased noise = _____ image contrast.






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






25. What was the earliest computer device called?






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






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






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






29. 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?






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






31. Computers operate from ____ ____ language.






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






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






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






35. Which type of information consists of operating instructions?






36. What does DICOM stand for?






37. A larger matrix provides ____ pixels.






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






39. What are devices that process information?






40. What is the name for a binary digit?






41. What is the 'heart' of every computer?






42. What are the two most common output devices?






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






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






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






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






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






48. The quality of the data acquired from the IR is measured by what three data characteristics?






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






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







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