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 does a 1 in binary code stand for?






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






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






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






5. A low contrast image has a ___ frequency.






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






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






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






9. Increased noise = _____ image contrast.






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






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






12. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.






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






14. What provides specific instructions for calculations and sequential steps to be followed?






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






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






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






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






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






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






21. A larger matrix provides ____ pixels.






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






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






24. What changes the pixel value by addition or subtraction and controls image density?






25. 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.






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






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






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






29. If the window level increases - density will _____.






30. What are the two ways detectors acquire information?






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






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






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






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






35. Noise is ____ related to contrast.






36. The ____ is the heart of the computer while the ___ is the vessels.






37. Which type of information consists of collected facts?






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






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






40. What can memory be transferred as?






41. What is required for collection of input information?






42. Computers operate from ____ ____ language.






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






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






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






46. 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.






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






48. What does DICOM stand for?






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






50. Noise is measured as what?