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






2. What is required for collection of input information?






3. 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?






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






5. Medical imaging is often achieved from information that has been processed by what?






6. 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?






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






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






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






10. What type of memory storage devices are required for large amounts of data?






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






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






13. What are the two most common output devices?






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






15. What are the two most common output devices?






16. What is the measure of the differences between the data values referred to as?






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






18. What are the two ways detectors acquire information?






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






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






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






22. A low contrast image has a ___ frequency.






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






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






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






26. What does DICOM stand for?






27. Noise is measured as what?






28. Fluoroscopic noise mostly comes from what?






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






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






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






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






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






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






35. What are the two types of information computers use?






36. Who or What is responsible for density changes on a digital image? On a manual image






37. What is high-pass filtering also called?






38. 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.






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






40. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?






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






42. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained






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






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






45. Medical imaging is often achieved from information that has been processed by what?






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






47. A low contrast image has a ___ frequency.






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






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






50. What is the system of conductors that connects the various components of a computer system and permits the CPU to accept inputs from any point along the conductor?