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 information stored as magnetic variations referred to as?






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






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






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






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






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






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






8. 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?






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






10. Which memory replaces new information with the old; can change?






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






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






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






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






15. 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.






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






17. What are devices that process information?






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






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






20. 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.






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






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






23. What is required for collection of input information?






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






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






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






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






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






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






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






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






32. What can memory be transferred as?






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






34. What is the name for a binary digit?






35. Computers operate from ____ ____ language.






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






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






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






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






40. 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.






41. What does DICOM stand for?






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






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






44. A low contrast image has a ___ frequency.






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






46. 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?






47. Noise is measured as what?






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






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






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