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 a square series of boxes that gives form to the image?






2. Which type of filter amplifies or deletes all but a selected range or band of frequencies and is useful in the elimination of characteristic emission peaks?






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






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






5. Computerized digital images are described in terms of what






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






7. What was the earliest computer device called?






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






9. Resolution is controlled by what?






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






11. 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.






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






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






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






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






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






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






18. Computers operate from ____ ____ language.






19. Medical imaging is often achieved from information that has been processed by what?






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






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






22. Modalities differ in bit depth that is available depending on the capabilities of what?






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






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






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






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






27. 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?






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






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






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






31. Window width and contrast have an ____ relationship.






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






33. What determines resolution?






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






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






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






37. A high contrast image has a ___ frequency.






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






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






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






41. What can memory be transferred as?






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






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






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






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






46. What is the primary limitation with the resolution on digital images?






47. Resolution is controlled by what?






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






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






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