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






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






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






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






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






6. Fluoroscopic noise mostly comes from what?






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






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






10. 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?






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






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






13. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?






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






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






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






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






18. What is high-pass filtering also called?






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






20. What are devices that process information?






21. The quality of the data acquired from the IR is measured by what three data characteristics?






22. What modalities are array processors useful for?






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






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






25. What are devices that process information?






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






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






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






29. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?






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






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






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






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






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






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






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






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






38. 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?






39. What was the earliest computer device called?






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






41. What are the two ways detectors acquire information?






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






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






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






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






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






47. 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.






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






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






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