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 name for an 8-bit word?






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






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






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






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






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






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






8. What are devices that process information?






9. What determines resolution?






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






11. Because electrical currents are understood as being either on or off - the binary system consists of information recorded as either a _ for off or a _ for on.






12. Changes in window width are sometimes called gray scale ____ or ____.






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






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






15. Window width and contrast have an ____ relationship.






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






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






18. The number of shades of gray is determined by what?






19. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?






20. What is high-pass filtering also called?






21. A low contrast image has a ___ frequency.






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






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






24. What is the 'heart' of every computer?






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






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






27. Which memory replaces new information with the old; can change?






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






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






30. Window width and contrast have an ____ relationship.






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






32. Computer programs are called what?






33. What can memory be transferred as?






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






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






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






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






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






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






40. What is high-pass filtering also called?






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






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






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






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






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






46. What is the 'heart' of every computer?






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






48. The quality of the data acquired from the IR is measured by what three data characteristics?






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






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