Test your basic knowledge |

Digital Image Processing

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
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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 modalities are array processors useful for?






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






3. Computers operate from ____ ____ language.






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






5. A high contrast image has a ___ frequency.






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






7. A low contrast image has a ___ frequency.






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






9. What is the measure of the differences between the data values referred to as?






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






11. Noise is measured as what?






12. Noise is ____ related to contrast.






13. Modalities differ in bit depth that is available depending on the capabilities of what?






14. 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.






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






16. What are the two most common output devices?






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






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






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






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






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






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






23. Increased noise = _____ image contrast.






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






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






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






27. 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.






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






29. Noise is measured as what?






30. Resolution is controlled by what?






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






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






33. Which type of information consists of collected facts?






34. Fluoroscopic noise mostly comes from what?






35. What modalities are array processors useful for?






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






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






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






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






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






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






42. 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?






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






44. A high contrast image has a ___ frequency.






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






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






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






48. What is the 'noisiest' component of a digital system?






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






50. A low contrast image has a ___ frequency.







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