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. In what time period did microchip technology come out?






2. What are devices that process information?






3. What can memory be transferred as?






4. What is required for collection of input information?






5. 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.






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






7. 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?






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






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






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






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






12. A larger matrix provides ____ pixels.






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






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






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






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






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






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






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






20. A high contrast image has a ___ frequency.






21. Which computers handle data composed of definite quantities of current?






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






23. Noise is ____ related to contrast.






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






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






26. A low contrast image has a ___ frequency.






27. What is the system of conductors that connects the various components of a computer system and permits the CPU to accept inputs from any point along the conductor?






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






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






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






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






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






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






34. 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.






35. 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?






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






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






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






39. When subject contrast is high - the acquired data contrast will be ____.






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






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






42. What modalities are array processors useful for?






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






44. Computers operate from ____ ____ language.






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






46. If window width increases - image contrast will ____.






47. If window width increases - image contrast will ____.






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






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






50. What are the two ways detectors acquire information?