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 an image that has been converted into numerical values for transmission or processing?






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






4. 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?






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






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






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






8. Computer programs are called what?






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






10. A high contrast image has a ___ frequency.






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






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






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






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






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






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






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






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






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






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






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






22. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?






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






24. What determines resolution?






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






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






27. Which type of information consists of operating instructions?






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






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






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






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






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






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






34. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.






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






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






37. It is important that the radiographer understand anatomy from different perspectives due to the methods of digital processing and image information? What are the 3 perspectives?






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






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






40. 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?






41. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?






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






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






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






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






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






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






48. 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.






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






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







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