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






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






3. DICOM imaging now includes compatibility via a database system that includes linage of the patient images with the patient's EMR. This database system is called what?






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






5. What was the earliest computer device called?






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






7. What are the two most common output devices?






8. What is high-pass filtering also called?






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






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






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






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






13. When was ENIAC invented?






14. Increased noise = _____ image contrast.






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






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






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






18. Computer equipment is called what?






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






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






21. A low contrast image has a ___ frequency.






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






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






24. A larger matrix provides ____ pixels.






25. Which type of information consists of collected facts?






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






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






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






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






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






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






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






33. A high contrast image has a ___ frequency.






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






35. 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.






36. What are the two ways detectors acquire information?






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. When was ENIAC invented?






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






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






41. What is required for collection of input information?






42. What is the name for a binary digit?






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






44. What does DICOM stand for?






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






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






47. Which type of information consists of collected facts?






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






49. Computer programs are called what?






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