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






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






3. Computer programs are called what?






4. Computer equipment is called what?






5. Each pixel is capable of representing a wide range of what?






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






7. Computers operate from ____ ____ language.






8. What was the earliest computer device called?






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






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






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






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






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






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






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






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






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






18. 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.






19. Resolution is controlled by what?






20. 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?






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






22. What can memory be transferred as?






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






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






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






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






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






28. 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?






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






30. 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.






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






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






33. Which type of information consists of collected facts?






34. Fluoroscopic noise mostly comes from what?






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






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






37. What is the system of conductors that connects the various components of a computer system and permits the CPU to accept inputs from any point along the conductor?






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






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






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






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






42. Increased noise = _____ image contrast.






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






44. Which type of information consists of operating instructions?






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






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






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






48. Computerized digital images are described in terms of what






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






50. What are the two most common output devices?