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






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






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






4. What determines resolution?






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






6. Window width and contrast have an ____ relationship.






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






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






9. What is high-pass filtering also called?






10. What modalities are array processors useful for?






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






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






13. A larger matrix provides ____ pixels.






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






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






16. The _____ the matrix size - the better the resolution.






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






18. A low contrast image has a ___ frequency.






19. What was the earliest computer device called?






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






21. Noise is ____ related to contrast.






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






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






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






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






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






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






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






29. 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.






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






31. When was ENIAC invented?






32. What determines resolution?






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






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






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






36. Computers operate from ____ ____ language.






37. A low contrast image has a ___ frequency.






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






39. 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.






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






41. 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?






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






43. What is the name for a binary digit?






44. What can memory be transferred as?






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






46. What does DICOM stand for?






47. 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?






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






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






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