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 frequency response of the incoming signal called?






2. What are the two most common output devices?






3. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.






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






5. 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?






6. What are devices that process information?






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






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






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






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






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






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






13. Digital detectors are capable of producing ______ shades of gray.






14. Computers operate from ____ ____ language.






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






16. 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.






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






18. What does DICOM stand for?






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






20. Digital detectors are capable of producing ______ shades of gray.






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






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






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






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






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






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






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






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






29. A high S/N indicates ___ noise in the image.






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






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






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






33. A high contrast image has a ___ frequency.






34. 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?






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






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






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






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






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






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






41. What does DICOM stand for?






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






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






44. 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.






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






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






47. Fluoroscopic noise mostly comes from what?






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






49. What determines resolution?






50. What is required for collection of input information?