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 is the name for an 8-bit word?






2. 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?






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






4. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?






5. What is high-pass filtering also called?






6. What is high-pass filtering also called?






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






8. 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.






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






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






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






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






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






14. Which memory can only be extracted without alteration; cannot change?






15. Which type of information consists of collected facts?






16. What input device do radiographers use on a normal basis?






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






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






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






20. Computerized digital images are described in terms of what






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






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






23. In what time period did mathematical theory and solid-state electronics come out?






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






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






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






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






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






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






30. What is the primary limitation with the resolution on digital images?






31. What is the name for a binary digit?






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






33. Resolution is controlled by what?






34. Which memory can only be extracted without alteration; cannot change?






35. Increased noise = _____ image contrast.






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






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






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






39. Resolution is controlled by what?






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






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






42. What is required for collection of input information?






43. 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?






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






45. What input device do radiographers use on a normal basis?






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






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






48. DICOM imaging now includes compatibility via a database system that includes linage of the patient images with the patient's EMR. This database system is called what?






49. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.






50. Which type of information consists of operating instructions?