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. Computer memory is often rated in terms of total ____ memory.






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






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






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






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






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






8. What are devices that process information?






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






10. Computerized digital images are described in terms of what






11. What was the earliest computer device called?






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






13. 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.






14. Window width and contrast have an ____ relationship.






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






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






17. 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.






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






19. Computer equipment is called what?






20. Computerized digital images are described in terms of what






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






22. 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.






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






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






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






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






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






28. What is required for collection of input information?






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






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






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






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






33. Which type of information consists of operating instructions?






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






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






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






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






38. Computer programs are called what?






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






40. What is the mathematical algorithm used to create all medical images?






41. Noise is measured as what?






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






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






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






45. Noise is measured as what?






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






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






48. A high contrast image has a ___ frequency.






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






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