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






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






3. Computerized digital images are described in terms of what






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






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






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






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






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






9. Computer equipment is called what?






10. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.






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






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






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






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






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






16. Computerized digital images are described in terms of what






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






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






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






20. What modalities are array processors useful for?






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






22. Increased noise = _____ image contrast.






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






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






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






26. A larger matrix provides ____ pixels.






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






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






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






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






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






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






33. What can memory be transferred as?






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






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






36. Resolution is controlled by what?






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






38. What is high-pass filtering also called?






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






40. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.






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






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






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






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






45. Computer equipment is called what?






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






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






48. 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.






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






50. It is important that the radiographer understand anatomy from different perspectives due to the methods of digital processing and image information? What are the 3 perspectives?