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. Resolution is controlled by what?






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






3. Computers operate from ____ ____ language.






4. What are devices that process information?






5. When was ENIAC invented?






6. What is high-pass filtering also called?






7. 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.






8. Window width and contrast have an ____ relationship.






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






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






11. A larger matrix provides ____ pixels.






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






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






14. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?






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






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






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






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






19. The ____ is the heart of the computer while the ___ is the vessels.






20. What are the two ways detectors acquire information?






21. Noise is measured as what?






22. What are the two most common output devices?






23. Around what time did digital computerization come out for CT and US?






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






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






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






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






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






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






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






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






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






33. What does DICOM stand for?






34. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.






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






36. What modalities are array processors useful for?






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






38. Computer equipment is called what?






39. What does DICOM stand for?






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






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






42. What determines resolution?






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






44. What is the digital standard for imaging that is designed to ensure that all equipment fro all manufacturers who choose to adhere to the standard are speaking the same computer language?






45. 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?






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






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






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






49. What is required for collection of input information?






50. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.