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 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?






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






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






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






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






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






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






8. A high contrast image has a ___ frequency.






9. What is high-pass filtering also called?






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






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






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






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






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






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






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






17. Noise is ____ related to contrast.






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






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






20. What modalities are array processors useful for?






21. Which type of filter amplifies or deletes all but the high frequencies - appears to increase contrast - and is useful in vascular imaging or digital mammo.






22. Computer programs are called what?






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






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






25. Noise is ____ related to contrast.






26. What permit input/output of information to or from the CPU?






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






28. What does DICOM stand for?






29. What are devices that process information?






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






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






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






33. What is an image that has been converted into numerical values for transmission or processing?






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






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






36. 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.






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






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






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






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






41. If the window level increases - density will _____.






42. What determines resolution?






43. A larger matrix provides ____ pixels.






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






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






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






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






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






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






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