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. A high S/N indicates ___ noise in the image.






2. What are the two ways detectors acquire information?






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






4. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?






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






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






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






8. What modalities are array processors useful for?






9. The _____ the matrix size - the better the resolution.






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






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






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






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






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






15. Window width and contrast have an ____ relationship.






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






17. A low contrast image has a ___ frequency.






18. What determines resolution?






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






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






21. What are the two most common output devices?






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






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






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






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






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






27. Increased noise = _____ image contrast.






28. What is the name for a binary digit?






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






30. 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.






31. Window width and contrast have an ____ relationship.






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






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






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






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






36. Computerized digital images are described in terms of what






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






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






39. What can memory be transferred as?






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






41. Computer programs are called what?






42. A low contrast image has a ___ frequency.






43. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?






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






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






46. Fluoroscopic noise mostly comes from what?






47. 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?






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






49. Computer equipment is called what?






50. Which type of information consists of collected facts?