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






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






3. Resolution is controlled by what?






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






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






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






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






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






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






10. What input device do radiographers use on a normal basis?






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






12. Computers operate from ____ ____ language.






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






14. When was ENIAC invented?






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






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






17. When was ENIAC invented?






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






19. 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.






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






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






22. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.






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






24. A high contrast image has a ___ frequency.






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






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






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






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






29. What was the earliest computer device called?






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






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






32. What does DICOM stand for?






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






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






35. What determines resolution?






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






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






38. What is the name for a binary digit?






39. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?






40. Noise is measured as what?






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






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






43. What are the two ways detectors acquire information?






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






45. 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.






46. Increased noise = _____ image contrast.






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






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






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






50. What are devices that process information?