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 are the 3 classifications of digitized image filters?






2. 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.






3. What 3 things were required prior to digital computer applications in medical imaging?






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






5. When was ENIAC invented?






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






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






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






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






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






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






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






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






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






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






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






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






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






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






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






21. 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.






22. Computer equipment is called what?






23. Computerized digital images are described in terms of what






24. Which type of information consists of operating instructions?






25. Computers operate from ____ ____ language.






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






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






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






29. Increased noise = _____ image contrast.






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






31. What are the two ways detectors acquire information?






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






33. 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?






34. What provides specific instructions for calculations and sequential steps to be followed?






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






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






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






38. What was the earliest computer device called?






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






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






41. Which type of information consists of collected facts?






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






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






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






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






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






47. What is high-pass filtering also called?






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






49. What was the earliest computer device called?






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