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






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






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






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






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






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






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






8. Computer programs are called what?






9. Computer programs are called what?






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






11. Noise is ____ related to contrast.






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






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






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






15. Increased noise = _____ image contrast.






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






17. Computerized digital images are described in terms of what






18. What is required for collection of input information?






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






20. A low contrast image has a ___ frequency.






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






22. What modalities are array processors useful for?






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






24. What is high-pass filtering also called?






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






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






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






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






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






30. What was the earliest computer device called?






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






32. Fluoroscopic noise mostly comes from what?






33. 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.






34. What are the two most common output devices?






35. Increased noise = _____ image contrast.






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






37. What changes the pixel value by addition or subtraction and controls image density?






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






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






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






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






42. 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?






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






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






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






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






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






48. A larger matrix provides ____ pixels.






49. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?






50. A low contrast image has a ___ frequency.