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 primary limitation with the resolution on digital images?






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. What is critical to how fast the computer system can function?






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






5. What was the earliest computer device called?






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






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






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






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






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






11. Noise is ____ related to contrast.






12. The number of shades of gray is determined by what?






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






14. 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.






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






16. If window width increases - image contrast will ____.






17. When detectors acquire their information by ____ they are receiving info from a specific area.






18. 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.






19. Computer equipment is called what?






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






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






22. Which type of information consists of operating instructions?






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






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






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






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






27. What is critical to how fast the computer system can function?






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






29. When was ENIAC invented?






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






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






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






33. 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?






34. What is the name of the 'modern electronic computer'?






35. Fluoroscopic noise mostly comes from what?






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






37. What is required for collection of input information?






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






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






40. What does DICOM stand for?






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






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






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






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






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






46. What are devices that process information?






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






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






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






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