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 permit input/output of information to or from the CPU?






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






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 name for an 8-bit word?






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






6. What are the two most common output devices?






7. What is high-pass filtering also called?






8. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?






9. What is required for collection of input information?






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






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






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






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






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






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






16. Computer programs are called what?






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






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






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






20. DICOM imaging now includes compatibility via a database system that includes linage of the patient images with the patient's EMR. This database system is called what?






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






22. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.






23. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.






24. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?






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






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






27. Which type of information consists of collected facts?






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






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






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






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






32. Resolution is controlled by what?






33. What is the name for a binary digit?






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






35. What modalities are array processors useful for?






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






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






38. What is the name for a binary digit?






39. A high contrast image has a ___ frequency.






40. DICOM imaging now includes compatibility via a database system that includes linage of the patient images with the patient's EMR. This database system is called what?






41. When was ENIAC invented?






42. What permit input/output of information to or from the CPU?






43. What is required for collection of input information?






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






45. What directs information to and from various parts of the computer?






46. What are devices that process information?






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






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






49. Window width and contrast have an ____ relationship.






50. Computers operate from ____ ____ language.