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. Noise is measured as what?






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






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






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






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






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






7. What are devices that process information?






8. 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?






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






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






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






12. Computer programs are called what?






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






14. Which type of information consists of collected facts?






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






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






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






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






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






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






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






22. What does DICOM stand for?






23. What is the digital standard for imaging that is designed to ensure that all equipment fro all manufacturers who choose to adhere to the standard are speaking the same computer language?






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






25. What is the digital standard for imaging that is designed to ensure that all equipment fro all manufacturers who choose to adhere to the standard are speaking the same computer language?






26. A high contrast image has a ___ frequency.






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






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






29. In what time period did mathematical theory and solid-state electronics come out?






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






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






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






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






34. What determines resolution?






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






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






37. Window width and contrast have an ____ relationship.






38. What can memory be transferred as?






39. Computers operate from ____ ____ language.






40. 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?






41. What does DICOM stand for?






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






43. Increased noise = _____ image contrast.






44. Noise is ____ related to contrast.






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






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






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






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






49. 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.






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